Mathematics High School

## Answers

**Answer 1**

Answer:

A. Va: 0i+550j, Vw: 50√2i+50√2j

B. 50√2i+50√2j+550j

C. 624.7mph and N6.5E

Step-by-step explanation:

A. For va, recall that it just has the y (i) component, which is just equal to its velocity.

for vw, there is an angle of 45 degrees, so to find the components do speed*sin(theta)

and speed *cos(theta)

Therefore,

Va: 0i+550j, Vw: 50√2i+50√2j

B. Simply add the I's and j's together to get your answers here, which gives

(0i+550j)+(50√2i+50√2j)

= 0i+50√2i+550j+50√2j

= 50√2i+50√2j+550j

C. Using Pythagoras theorem

a²+b² = c²

c² = (50√2i+50)² + (50√2j+550j)²

where a is i and b is j

For the angle, recall that it's just arctan(j/i)

when putting this into the calculator remember not to include the i and j in the arctan. This number should be 83.5 degrees, however this is not your final answer, compass bearings starting from the left in pre-calculus and other math courses, so subtract 83.5 from 90 to find your bearing.

90°-83.5° = 6.5

This gives, 624.7mph and N6.5E

## Related Questions

Determine whether each number could be the probability of an event. Explain your reasoning. 1.5

1

### Answers

Each number could be the probability of an event

Step-by-step explanation:

In words, this means that the probability of an event must be a number between 0 and 1 (inclusive). In words: The probability of an impossible event is 0. In words: The probability of an absolutely certain event is 1.

- All positive or all whole numbers can be probabilities.
- Numbers greater than one can be probabilities while numbers less than one cannot.
- States that anything that can be turned into a percent can represent a probability.
- Only probabilities related to a six-sided number cube will work.

The odds of an event is the ratio of the probability of an event to the probability of its complement. In other words, it is the ratio of favorable outcomes to unfavorable outcomes. We say the odds are "3 to 2," which means 3 favorable outcomes to every 2 unfavorable outcomes, and we write 3 : 2.

Divide the number of events by the number of possible outcomes. This will give us the probability of a single event occurring. In the case of rolling a 3 on a die, the number of events is 1 (there's only a single 3 on each die), and the number of outcomes is 6.

A steamboat can travel at an average speed of 11 miles per hour in still water. Traveling with the current the steamboat can travel 77 miles down the river in the same amount of time it takes to travel 44 miles upstream against the current. Find the speed of the current.

### Answers

Answer: the speed of the current is 3 mph

Step-by-step explanation:

Let x represent the speed of the river's current.

The speed of the steamboat in still water is 11 miles per hour.

Traveling with the current the steamboat can travel 77 miles downstream. The total speed downstream would be

(11 + x) mph

In the same amount of time, the steamboat travels 44 miles upstream against the current. The total speed upstream would be

(11 - x) mph.

Time = distance/speed

The time spent travelling downstream is

77/(11 + x)

The time spent travelling upstream is

44/(11 - x)

Since the time is the same, then

77/(11 + x) = 44/(11 - x)

Cross multiplying, it becomes

77(11 - x) = 44(11 + x)

847 - 77x = 484 + 44x

44x + 77x = 847 - 484

121x = 363

x = 363/121

x = 3

Suppose the time it takes a data collection operator to fill out an electronic form for a database is uniformly distributed between 1.3 and 2.1 minutes.(a) Determine the mean of X (in minutes) (Round your answer to 2 decimal places.)(b) Determine the variance of X (in minutes2) (Round your answer to 4 decimal places.)(c) What is the probability it will take less than two minutes to fill out the form? (Round your answer to 3 decimal places.)(d) What is the probability it will take more than 90 seconds to fill out the form? (Round your answer to 3 decimal places.)

### Answers

Answer:

my name is

Step-by-step explanation:

lucy lu

Suppose that X is the number of hours that a computer is used in a computer lab on campus. The table below is the probability distribution for X. What is the expected value of X, that is, what is the mean its distribution?X01234Probability0.20.20.40.150.05A. 0.8B. 1.0C. 1.65D. 2

### Answers

The expected value of X is Option C: E(X) = 1.65

Calculation of expected value:

We know that

Expected value of X, E(X) = ∑XP(X)

here

∑ = Summation

X = number of hours

P(X) = probability of a certain number of hours

So,

E(X) = (0× P(X=0)) + (1 ×P(X=1)) + (2 × P(X=2)) + (3 ×P(X=3)) + (4 ×P(X=4))

E(X) = (0 ×0.2) + (1 ×0.2) + (2 ×0.4) + (3 ×0.15) + (4 ×0.05)

E(X) = 0 + 0.2 + 0.8 + 0.45 + 0.20

= 1.65

Learn more about the mean here: brainly.com/question/14634922

Answer:

Option C: E(X) = 1.65

Step-by-step explanation:

Expected value of X, E(X) = ∑XP(X)

∑ = Summation

X = number of hours

P(X) = probability of a certain number of hours

E(X) = (0*P(X=0)) + (1*P(X=1)) + (2*P(X=2)) + (3*P(X=3)) + (4*P(X=4))

E(X) = (0*0.2) + (1*0.2) + (2*0.4) + (3*0.15) + (4*0.05)

E(X) = 0 + 0.2 + 0.8 + 0.45 + 0.20 = 1.65

E(X) = 1.65 - Option C

Plz help asap

Consider the functions f(x) = x2 + 10x – 5, g(x) = 8x + 1, and h(x) = 3x – 4. List the functions from least to greatest value when x = 3 and when x = 6. Then tell how you would explain to someone that you do not need to do any calculations to know the order of the functions when x = 15.

### Answers

Answer:

f(3) > g(3) > h(3)

f(6) > g(6) > h(6)

As x is increasing and all the functions behaving alike so

f(15) > g(15) > h(15)

Step-by-step explanation:

To check the incrasing order substitute values of x, firstly put x=3

we get,

f(3) = 34 , g(3) = 25 , h(3) = 5

thus

f(3) > g(3) > h(3)

Similarly,

f(6) = 91 , g(6) = 49 , h(6) = 14

f(6) > g(6) > h(6)

As x is increasing and all the functions behaving alike so

f(15) > g(15) > h(15)

Suppose you toss a fair, two-sided coin. List the sample space.

List one possible event.

Calculate the probability of that event.

### Answers

- The sample space is {H,T}.

- The one of the possible event is head

- The probability of that event is 50%.

Step-by-step explanation:

- Probability is a numerical description of an event to occur or how likely it is that a proposition is true.

- The set of all possible outcomes is called a sample space and the possible ordered outcomes are listed as elements in the set.

Suppose you toss a fair coin having two sides head and tail.

The sample space s = {H,T}

One of the possible events occur will be head ( or tail)

The probability of that event will be 50% because the tossed coin either shows the head or tail.

The student relations committee of a college consists of 2 administrators, 3 faculty members, and 5 students. Four administrators, 8 faculty members, and 20 students are eligible to serve. How many different committees are possible?

### Answers

Step-by-step explanation:

4 administrator are eligible and the student relations committee has only 2 administrator there are C (4,2) ways of choosing the administrators for the student relations committee

similarly for faculty members ways (8,3) and for students C (20,5)

the number of possible committee = 4!/2!2! × 8!/3!5! ×20!/5!15!

= 6 ×56 ×15504

= 5,209,344

Lin got a $50 gift card to an online music store. She uses the gift card to buy an album for $9.99. She also wants to use the gift card to buy some songs. Each song costs $1.29. Which of these inequalities describes this situation, where n is the number of songs Lin wants to buy?

### Answers

Answer: b)9.99+1.29n≤50

Step-by-step explanation:

Hi, this question is incomplete. To complete the question, the options are:

a)9.99+1.29n≥50

b)9.99+1.29n≤50

c)9.99−1.29n≥50

d)9.99−1.29n≤50

- So, to answer this question we have to analyze the information given:price of the album: $9.99

- cost of each song : $1.29

- gift card: $50

- number of songs : n

The correct option is b)9.99+1.29n≤50 , because the sum of the price of the album ($9.99) and the songs ($1.29 n) must be less or equal to the value of the gift card ($50).

Feel free to ask for more if needed or if you did not understand something.

Answer:

true

Step-by-step explanation:

A wet bicycle tire leaves a trace of water on the floor. The tire has a radius of 30 \text{ cm}30 cm30, start text, space, c, m, end text, and the bicycle wheel makes 333 full rotations before stopping. How long is the trace of water left on the floor? Round your answer to the nearest

### Answers

Answer:

186 cm

Step-by-step explanation:

Since the bicycle wheel is making a rotation and not a revolution, the bicycle wheel is at one point.

The length of the trace of water left on the floor is simply the circumference of the bicycle wheel

Circumference = 2πR

where R = radius of the bicycle wheel

and π = pie

Circumference = 2 × (22/7) × 30 = 188.57143 cm

Answer:

565

Step-by-step explanation:

have a great day

Adult tickets to space amusement parkcost x dollars. Children's tickets cost y dollars. The henson family bought 3 aduly and 1 child ticket for $163. The Garcia family boit 2 adult and 3 child tickets for $174. Write equations to represent the to represent the Hensons' cost and the Garcias' cost.

### Answers

Answer:

3x + 1y = $163

2x + 3y =$174

Step-by-step explanation:

Adult tickets to space amusement park cost x dollars children’s tickets cost y dollars.

Henson family bought 3 adults and 1 child's tickets for $163

x + y = 163

3x + 1y = 163

The Garcia family bought 2 adults and 3 child’s ticket for $174.

x + y = $174

2x + 3y = $174

Therefore the equations representing both families cost are

Henson family

3x + 1y = $163

Garcia family

2x + 3y = $174

Thanks to a new conservation program, a population with only 200 individuals at the beginning of the year is growing exponentially. The population has a per capita birth rate of 0.5 per year and a death rate of 0.2 per year. What is the growth rate during the year?

### Answers

Answer:

0.3 per year

Step-by-step explanation:

Number of newborn per year: 200*0.5 = 100

Number of death per year: 200*0.2= 40

So, the difference between birth and death = 100-40 = 60 (people)

and the growth rate during the year is: 60/200 = 0.3

Hope this answer will find you well.

At 1:30 marlon left his house to go to the beach a distance of 5.25 miles. He rode his skateboard until 2:15 and then walked the rest of the way. He arrived at the beach at 3:00. Marlon's speed on his skateboard is 2.5 times his walking speed. Find his speed when skateboarding and when walking.

### Answers

Answer: his speed when skateboarding 5 mph and when walking is 2 mph

Step-by-step explanation:

Marlon started riding his skateboard from his house at 1:30 until 2:15 when he started walking. This means that the time he spent riding his skateboard is

2:15 - 1:30 = 45 minutes

Converting 45 minutes to hours, it becomes

45/60 = 0.75 hour

He walked the rest of the way. He arrived at the beach at 3:00. This means that the time he spent walking is

3:00 - 2:15 = 45 minutes

Converting 45 minutes to hours, it becomes

45/60 = 0.75 hour

Let x represent Marlon's walking speed.

Marlon's speed on his skateboard is 2.5 times his walking speed. This means that his speed when skateboarding is 2.5x

Distance = speed × time

Distance covered while walking is

x × 0.75 = 0.75x

Distance covered while skateboarding is

2.5x × 0.75 = 1.875x

Since the total distance to the beach is 5.25 miles, then

0.75x + 1.875x = 5.25

2.625x = 5.25

x = 5.25/2.625

x = 2mph

His speed while skateboarding is

2.5x = 2.5 × 2 = 5mph

Part A Prove that when x > 1, a triangle with side lengths a = x2 − 1, b = 2x, and c = x2 + 1 is a right triangle. Use the Pythagorean theorem and the given side lengths to create an equation. Use the equation to show that this triangle follows the rule describing right triangles. Explain your steps.

### Answers

Step-by-step explanation:

Given : A triangle with side lengths

To find : Prove that when x > 1, it is a right triangle. Use the Pythagorean theorem and the given side lengths to create an equation. Use the equation to show that this triangle follows the rule describing right triangles. Explain your steps ?

Solution :

For right triangle the Pythagorean theorem is to be satisfied.

i.e.

Here,

Substitute the values,

LHS=RHS

It is a right triangle.

Factor the following: x2−16x+64 (x−4)2 (x+8)^2

(x−4)(x−8)

(x+2)(x+8)

(x−8)^2

### Answers

Answer:

why wont u just go to quizlet for the answer of look it up on calculator soup it is a great place for those kinds of answers

Step-by-step explanation:

Sid used geometry software to draw a circle of a radius 4 units on a fgrid. He estimated the area of the circle by ciunting the squares that were mostly inside the circle and got an answer of 52 sq units. Fund the percent error in sids estimation to the nearest hundreth using the key π on your calculator..

### Answers

Answer:

Therefore, the error is 52-50.27=1.73.

Step-by-step explanation:

We know that Sid used geometry software to draw a circle of a radius 4 units on a fgrid. He estimated the area of the circle by ciunting the squares that were mostly inside the circle and got an answer of 52 sq units.

We use the formula:

Therefore, the error is 52-50.27=1.73.

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line between 2 and 3 p.m. Each was given a stop watch to record the time they spent in line. The times recorded were as follows (in minutes) 118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118

What is the first quartile?

A. 100.8

B. 119.8

C. 128.8

D. 112

E. 122.5

### Answers

Answer:

(D) 112

Step-by-step explanation:

First step: Arrange all the numbers from in ascending order that is from smallest to largest.

In Ascending order the set becomes:

45,99,108,116,118,118,118,119,120,121,124,130,148.

Second step: Find the median of the set of numbers.

Median is the middle number.

The median is 118. The median is also called the second quartile(Q2).

Third step: Now we consider all the numbers to the Left of the median(Q2). The numbers are listed below:

45,99,108,116,118,118.

Now we will find the median of these numbers.

The total numbers are 6 which is an even number.

To find the median of an even number, we add the two middle numbers and divide them by 2.

The two middle numbers are 108 and 116.

Therefore 108+116 = 224.

224/2 =112.

Therefore 112 becomes the first quartile (Q1).

Suppose that X is the number of bears spotted by tourists to Banff, Canada. The table below is the probability distribution for X. What is the expected value of X, that is, what is the mean of its distribution? X 0 1 2 3 4

Probability 0.2 0.1 0.4 0.15 0.15

### Answers

The Expected value of X = 1.95

Calculation of expected value:

We know that

Expected value of X, E(X) = ∑XP(X)

here

∑ = Summation

X = number of bears spotted

P(X) = probability of a certain number of bears spotted

Now

E(X) = (0 × P(X=0)) + (1 × P(X=1)) + (2 × P(X=2)) + (3 × P(X=3)) + (4 × P(X=4))

E(X) = (0 × 0.2) + (1 × 0.1) + (2 × 0.4) + (3 × 0.15) + (4 × 0.15)

E(X) = 0 + 0.1 + 0.8 + 0.45 + 0.60

= 1.95

Learn more about the probability here: brainly.com/question/20306112

Answer:

Expected value of X = 1.95

Step-by-step explanation:

Expected value of X, E(X) = ∑XP(X)

∑ = Summation

X = number of bears spotted

P(X) = probability of a certain number of bears spotted

E(X) = (0*P(X=0)) + (1*P(X=1)) + (2*P(X=2)) + (3*P(X=3)) + (4*P(X=4))

E(X) = (0*0.2) + (1*0.1) + (2*0.4) + (3*0.15) + (4*0.15)

E(X) = 0 + 0.1 + 0.8 + 0.45 + 0.60 = 1.95

Which statements are true regarding the sides and angles

of the triangle? Select three options.

### Answers

Answer:

What are the options?

Step-by-step explanation:

A population of 60 foxes in a wildlife preserve triples in size every 15 years. The function y = 60 times 3^x, where x is the number of 15-year periods, models the population growth. How many foxes will there be after 30 years? After 30 years there will be __________foxes. (Type a whole number.)

### Answers

Answer: After 30 years there will be 540

Step-by-step explanation:

The function that models the the population growth of the foxes in the wildlife reserve is expressed as

y = 60 times 3^x,

Where

x represents the number of 15-year periods.

The initial number of foxes in the wildlife is 60

Since the population the foxes in the wildlife preserve triples in size every 15 years, in 30 years,

x = 30/15 = 2

Therefore,

y = 60 × 3²

y = 540 foxes

Can SOMEONE HELP ME 100 POINTS

-15=22x+7 what is X

### Answers

Answer:

Step-by-step explanation:

Step 1: Subtract 7 from both sides

Step 2: Divide both sides by 22

Answer:

Answer:

x=-1

Step-by-step explanation:

-15 = 22x + 7

-7 -7

----------------------

-22+22x

x=-1

## FAQs

### What is the actual speed and direction of the 747 relative to the ground? ›

To find the direction, we can use the arctangent function: **θ=arctan(650100)≈81.2∘ north of east**. So, the actual speed of the 747 relative to the ground is approximately 661.4 mph, and its direction is approximately 81.2 degrees north of east.

**What is the rotation speed of a Boeing 747? ›**

A typical takeoff or rotation speed of a Boeing 747-400 model—which was the biggest selling of the 747 variants—is around **160 knots**. The Boeing 747-8 Intercontinental, the most recent 747 passenger variant, has a typical cruise speed of Mach 0.86 while flying at an altitude of 35,000 feet, according to Boeing.

**What is the propulsion system of a Boeing 747? ›**

The 747 is a four-engined jet aircraft, initially powered by **Pratt & Whitney JT9D turbofan engines, then General Electric CF6 and Rolls-Royce RB211 engines for the original variants**.

**What is the cruise speed and altitude of a Boeing 747? ›**

Aircraft type | Speed in km/u* | Altitude in ft* |
---|---|---|

Boeing 747 | 920 | 35,105 |

Boeing 737 | 850 | 35,000 |

Boeing 777 | 905 | 35,000 |

Boeing 787 Dreamliner | 907 | 40,026 |

**How do you find the ground speed and direction of a plane? ›**

Ground speed can be determined by **the vector sum of the aircraft's true airspeed and the current wind speed and direction**; a headwind subtracts from the ground speed, while a tailwind adds to it. Winds at other angles to the heading will have components of either headwind or tailwind as well as a crosswind component.

**How do you calculate flight speed? ›**

To calculate the speed, **divide the distance by the time**. Example: A package delivery drone flies 22.5 km in 15 minutes.

**What is the acceleration of a 747 jumbo jet? ›**

The 747 goes from its approximate takeoff speed of 200 mph (89.4 meters per second) to 0 mph in 27 seconds. Using the definition of acceleration, this means the brake-only stopping 747 has acceleration magnitude of **3.31 m/s ^{2}**. So, let's assume that the aircraft starts at 20 mph (8.94 m/s).

**What is the minimum speed for a 747? ›**

Different airplanes will require different speeds to take off. In order for a plane to take off, it must be going fast enough for the wings to generate enough lift to overcome the force of weight. A Boeing 747 under standard conditions must be going **296kph (184 mph)** to take off.

**What is the rotation angle of a 747-400? ›**

I was surprised that despite it's length, the Boeing 747-400 Jumbo Jet has a rotation angle of **10 degrees**.

**What is the thrust of a Boeing 747 engine? ›**

Boeing's first 747 jumbo had much bigger engines which produced about **45,000lbs** of thrust. The most recent model, the 747-8, has engines that produce 66,000lbs of thrust.

### What is a propulsion system and how is it used to move an aircraft and a spacecraft? ›

A propulsion system is **a machine that produces thrust to push an object forward**. On airplanes, thrust is usually generated through some application of Newton's third law of action and reaction. A gas, or working fluid, is accelerated by the engine, and the reaction to this acceleration produces a force on the engine.

**What is the propulsion system of an aircraft? ›**

A propulsion system for an aircraft, which is **air-breathing**, consists of a mechanical power source (i.e., an engine of some kind) and a propulsor capable of doing work on the air to increase its momentum and so convert this engine power into a propulsive force, e.g., by utilizing a propeller, jet engine, etc., as shown ...

**How do you calculate cruise speed of an aircraft? ›**

Simply subtract Vx from Vy and add the difference back to Vy, i.e. **Vy + (Vy – Vx)**. For example, if Vx is 64 knots and Vy is 76 knots, the calculation would be 76 – 64 = 12 followed by 76 + 12 = 88. So in this example, Vcc would be 88 knots.

**What is the maximum flight level of a 747? ›**

Boeing widebodies

Lufthansa previously bragged that its 747-400 could reach the highest altitude in its fleet, with a maximum service ceiling of **44,947 ft (13,610 m)**. The German flag carrier also flies the modern 747-8, which has a service ceiling of 43,100 ft (13,137 m).

**What is the average speed of a jumbo jet? ›**

At takeoff, the average speed of a commercial airplane is anywhere between 160 and 180 mph (140 to 156 knots).

**What is the formula of speed with direction? ›**

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation **r = d/Δt**.

**What is the formula for speed and direction of an object? ›**

The average velocity of an object moving in a constant direction is calculated with the formula: **velocity = distance time** . The SI unit for velocity is m/s, plus the direction the object is traveling.

**What is the formula for ground speed of an aircraft? ›**

The vector addition of airspeed and wind speed gives the ground speed of an aircraft: **v _{g} = √(v_{a}^{2} + v_{w}^{2} - (2v_{a}v_{w} cos θ)**. Thus, for a given airspeed, the ground speed becomes greater than airspeed when the angle between airspeed and wind speed is lower.

**What is the formula for aviation calculations? ›**

To find the distance flown in a given time, **multiply GS by time**. The distance flown in 1 hour 45 minutes at a GS of 120 knots is 120 × 1.75 or 210 NM. To find the GS, divide the distance flown by the time required. If an aircraft flies 270 NM in 3 hours, the GS is 270 ÷ 3 = 90 knots.

**What is the air pressure of Boeing 747? ›**

At 10,300 m (34,000 ft) cabin pressure was **843 hPa** and changed 8 hPa for every 300 m (1000 ft) change in aircraft altitude (r(2) = 0.993; P < 0.001). Lowest cabin pressure was 792 hPa at 12 200 m (40,000 ft) but during only 2% of flight time was cabin pressure less than 800 hPa.

### How to calculate acceleration? ›

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation **a = Δv/Δt**. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

**What is the minimum takeoff length for a 747? ›**

The chart notes that if a Boeing 747-400 had an operational landing weight of 475,000 lbs (215,456 kg) and wanted to land at a runway located at sea level, then the suggested runway length would be a little over 1,500 meters, or roughly **5,000 feet**.

**What is the acceleration speed of a plane? ›**

Planes accelerate **between 115 mph and 160 mph** (185 km/h – 257 km/h or 100 -140 knots) on the runway. But, the exact acceleration depends on the plane's model, outside temperature, and other factors. Generally speaking, commercial planes require the most acceleration to take off, while small planes require the least.

**What is the formula for rotating degrees? ›**

Here are the rotation rules: **90° clockwise rotation: (x,y) becomes (y,-x)** 90° counterclockwise rotation: (x,y) becomes (-y,x) 180° clockwise and counterclockwise rotation: (x, y) becomes (-x,-y)

**How do you calculate flight angle? ›**

If we know the distance flown and the altitude change, we can calculate the glide angle using trigonometry. **The tangent (tan) of the glide angle (a) is equal to the change in height (h) divided by the distance flown (d)**.

**What is the angle rotation formula? ›**

The angle of rotation between the two points or vertices is the number of central angles times the measure of a single central angle: **angle of rotation =m×α = m × α** .

**What is the formula for thrust in aircraft? ›**

Thrust Calculation

The net thrust (F_{N}) of an engine is given by: **F N = ( m ˙ a i r + m ˙ f u e l ) v e − m ˙ a i r v**. Most types of jet engine have an air intake, which provides the bulk of the fluid exiting the exhaust.

**How many horsepower is a 747? ›**

...

Characteristic | Lockheed 1049G | Boeing 747 |
---|---|---|

Power per engine, hp | 1 646 | 14 984 |

Dry engine weight, lb | 3 675 | 8 600 |

Power to weight ratio | 0.45 | 1.74 |

**Is 747 supersonic? ›**

The 747-100, for instance, was tested up to Mach 0.99, almost breaking the sound barrier. Other 747s, such as Air Force One, have approached the sound barrier but never crossed it. As such, **it's unclear if we will ever know if Evergreen's 747-100 really went supersonic**.

**What are the two 2 types of jet propulsion? ›**

There are two general types of jet propulsion **air-breathing and nonair-breathing engines**.

### What is the difference between propulsion and thrust? ›

Thrust provides the forward motion needed to sustain lift and counteract drag. It is also used to accelerate, gain altitude, and sometimes to maneuver. **Propulsion is the act of moving or pushing an object forward**.

**What is the most common propulsion system in modern aircraft? ›**

The most widely used form of propulsion system for modern aircraft is the **gas turbine engine**. Turbine engines come in a variety of forms.

**How does a jet engine work? ›**

Jet engines, which are also called gas turbines, work by **sucking air into the front of the engine using a fan**. From there, the engine compresses the air, mixes fuel with it, ignites the fuel/air mixture, and shoots it out the back of the engine, creating thrust.

**How does the cooling system of the aircraft turbine engine works? ›**

**The turbine blades are cooled by engine bleed air**. Air from the compressor stages of the engine is bled and fed to the blades to cool them. There are holes drilled on the blades through which the air is passed. In early jet engines, only Low Pressure (LP) air is passed through the blades.

**What is the speed of the plane relative to the ground? ›**

The velocity of the plane with respect to the ground is **equal to the velocity of the plane with respect to the air plus the velocity of the air with respect to the ground**.

**Is the actual speed of the aircraft over the ground? ›**

**Ground speed** is the actual speed that an aircraft travels over the ground and is also referred to as "shadow speed." Ground speed combines the aircraft's airspeed and the wind speed relative to the aircraft's direction of flight.

**What is air speed relative to the ground? ›**

Airspeed is the vector difference between the ground speed and the wind speed. **On a perfectly still day, the airspeed is equal to the ground speed**. But if the wind is blowing in the same direction that the aircraft is moving, the airspeed will be less than the ground speed.

**What is the actual ground speed of the aircraft? ›**

Ground speed: It is the time one takes to cover a certain distance over the ground. For example, at cruise altitude, aeroplanes might have a ground speed of **300–600 knots (555-1,110 kmph)**. However, the wind can alter the speed at which the aircraft passes over the ground.

**How do you calculate wind speed on an aircraft? ›**

From the aircraft, we can not directly measure the wind speed, but must compute the wind speed from the ground speed and airspeed. **Wind speed is the vector difference between the airspeed and the ground speed**. On a perfectly still day the wind speed is zero and the airspeed is equal to the ground speed.

**What must you know in order to calculate the speed of an object? ›**

The equation for speed is simple: **distance divided by time**. You take the distance traveled (for example 3 meters), and divide it by the time (three seconds) to get the speed (one meter per second).

### What is the vertical speed of a 747 descent? ›

This means you should begin your descent 105 nautical miles from your destination, maintaining a speed of 250 KIAS (about 45 percent N1) and a descent rate of **1,500 to 2,000 feet per minute**, with thrust set at idle.

**What is the difference between true airspeed and airspeed? ›**

Indicated Airspeed is the speed shown on the airspeed indicator. Calibrated Airspeed is indicated airspeed corrected for position installation error. Equivalent Airspeed is calibrated airspeed corrected for compressibility. **True Airspeed is equivalent airspeed corrected for temperature and pressure altitude**.

**What is the rule of thumb for true airspeed? ›**

A very simple rule of thumb is to **add 2% to the calibrated airspeed for every 1000 ft of altitude**.

**What is the speed at which an aircraft is moving relative to the surrounding air? ›**

**Indicated Airspeed** and True Airspeed

The speed indicated on an ASI is known as the Indicated Airspeed (IAS). It is the speed of the aircraft relative to the body of air through which it is flying.

**What is the formula for velocity relative to the ground? ›**

It is the vector sum of the velocity v_{PT} of the passenger relative to the train and the velocity v_{TG} of the train relative to the ground:**v _{PG} = v_{PT}+v_{TG}**. Each velocity symbol in Equation 3.7 contains a two-letter subscript.

**What is the measurement of an aircraft from the ground? ›**

**Absolute altitude** refers to the actual distance the aircraft is flying in relation to the ground and is expressed in “feet above ground level.” This type of altitude is generally determined using a radar altimeter, which measures how long it takes radar signals to reach the ground and reflect up to the plane.