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lana [24]
3 years ago
6

A airplane travels 3260 kilometers in 4 hours. What is the airplane average speed?

Physics
1 answer:
zavuch27 [327]3 years ago
4 0
I'm pretty sure that it's 815.
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oee [108]

Answer:

D) The ball exerts a force on the wall and the wall exerts a force back.

Explanation:

Newton's third law of motion states that:

"When an object A exerts a force on another object B, then object B exerts an equal and opposite force on object A"

In this problem, we can identify (for instance) object A with tha ball and object B with the wall. Therefore, if we apply Newton's third law, we get:

The ball (object A) exerts a force on the wall (object B), therefore the wall (object B) exerts an equal and opposite force on the ball (object A). So, option D is the correct one.

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3 years ago
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Answer:

2.4 m

Explanation:

Consider the motion along the vertical direction

y_{o} = initial position of ball above the ground = 4.5 m

t = time taken by the ball to hit the smokestack = 0.65 s

v_{oy} = initial velocity of the ball along vertical direction

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y = position of ball at the time of hitting the smokestack

Using the kinematics equation

y = y_{o} + v_{oy} t + (0.5) a_{y} t^{2}

inserting the above values

y = 4.5 + (0) (0.65) + (0.5) (- 9.8) (0.65)^{2} \\y = 2.4 m

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3 years ago
a block that is 80 degrees is places next to a 20 degree block. the warmer block heats the cooler block by the process of... A)c
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Answer: option B: conduction.

Conduction is the heat transfer that happens between two bodies in direct contact, due to the collision of the molecules, atoms and electrons within the body (microscopical level).
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Answer:

Most stars in the Milky Way's halo are <u>very old</u>

<u>very oldThere is no recycling of gas in the halo, so halo stars are quite old.</u>

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