The captain told the passengers that the plane is flying at 450 miles per hour this information describes the planeVelocity
Speed
Acceleration
Direction

Answers

Answer 1

Answer:

Answer:

The correct answer is speed.

Explanation:

Time rate of change in distance is called as speed. On the other hand, time rate of change in displacement is called velocity. The captain told time rate of change in distance (450 miles/hour) because he did not mention the direction. Hence, 450 miles/hour describes the speed of the plane. We do not identify any relation of this information with direction and acceleration.

Answer 2

Answer: speed, why velocity has direction acceleration Is a change in speed and it doesn't give a direction so it's speed

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B.
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Answers

Answer is D.the distance between the focal point and the center of the lens.

Answer:

it is B i took the test and got it wrong when someone said it was A

Explanation:

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What is radiation? Transfer of heat through objects touching the source. Transfer of heat through direct physical contact. Transfer of heat through electromagnetic waves. Transfer of heat through the movement of particles.

Answers

Answer:

Transfer of heat through electromagnetic waves

Answer:

Transfer of heat through electromagnetic waves.

I got it right in a test

F=ma make m the subject

Answers

Answer:

M=f/a

Explanation:

F=m x a

÷a both sides

F÷a = m

M=f/a

4. A 1500 kg car is rolling at 2.0 m/s. You would like to stop the car by firing a 10 kg blob ofsticky clay at it. How fast should you fire the clay?

Answers

The clay must be 300 m/s fast in other to stop the car.

For the car to stop, The momentum of the car must be equal to the momentum of the clay.

Formula:

MV = mv................. Equation 1

Where:

M = mass of the car
V = Velocity of the car
m = mass of the clay
v = velocity of the clay

Make v the subject of the equation.

v = MV/m................... Equation 2

From the question,

Given:

M = 1500 kg
V = 2 m/s
m = 10 kg

Substitute these values into equation 2

v = 1500(2)/10
v = 300 m/s.

Hence, The clay must be 300 m/s fast in other to stop the car.

Learn more about momentum here: brainly.com/question/7973509

Final answer:

To stop the car rolling at 2.0 m/s with a blob of clay, you should fire the blob of clay at a speed of 300 m/s. This is based on the principle of conservation of momentum.

Explanation:

The question involves a principle of Physics called the law of conservation of momentum. The law states that the total momentum of a system remains constant if no external forces act on it. Here, the car and the clay are the two objects in the system.

At the start, only the car has momentum, which can be calculated with the equation: momentum = mass x velocity => momentum of car = 1500 kg x 2 m/s = 3000 kg m/s.

After the clay is fired at the car, the total momentum of the system (car + clay) still remains 3000 kg m/s, but now the momentum is shared between them. We want to stop the car, so it will now have no momentum, meaning all momentum must be with the clay.

The equation again turns to momentum = mass x velocity => velocity = momentum/mass => velocity of clay = 3000 kg m/s / 10 kg = 300 m/s.

You should fire the clay at 300 m/s to stop the car.

Learn more about the Law of Conservation of Momentum here:

brainly.com/question/33316833

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