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3 years ago

A 75 kg pilot flies a plane in a loop. At the top of the loop, where the plane is completely

Physics

1 answer:

erica [24]3 years ago

6 0

Answer:

1.47 km

Explanation:

When the pilot hangs freely in the seat and does not push against the seat belt, his centripetal acceleration would counter balance gravitational acceleration g = 9.81m/s2 = a

We can calculate the radius of the loop using velocity v = 120m/s and a

$a = \frac{v^2}{r}$

$r = \frac{v^2}{a} = \frac{120^2}{9.81} = 1467.89 m$ or 1.46 km

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A source of sound is kept in a jar in a vacuum. Air is slowly introduced in to the jar. What happens to the sound coming out of

timama [110]

The loudness of the sound increases gradually as the air is slowly introduced in to the jar. This is because sound needs a physical medium and in a vacuum there is none. The air provides that medium and as it is introduced, the transfer of sound energy increases

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3 years ago

Which of the following does NOT support the geologic evidence used to date the earth?

Zanzabum

Answer:

comparing the anatomy of organisms

Explanation:

Basically, Rocks are the solid evidence used to date the earth.

Due to the changing in the genetic make up of organisms,the anatomy of organisms is not a reliable evidence to date the earth.

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3 years ago

What happens to temperature during condensation?

Alla [95]

CONDENSATION is the process by which water vapor (gas) in the atmosphere turns into water (liquid state). It is the opposite of EVAPORATION.Cool temperatures are essential for condensation to happen, because as long as the temperature in the atmosphere is high, it can hold the water vapor and delay condensation. So the temperature in condensation rises.

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3 years ago

Five different students in Mr. Garcia's class have done an experiment once, and each one got similar results. What should the st

trapecia [35]

Repeat the experiment

Explanation:

To increase the validity of the results obtained from the single experiment, the students should be encouraged to repeat the experiments more number of times as much as possible.

In an experiment, scientist always try to limit errors by making precise and accurate observation. A single observation does not really represent a precise and accurate finding. When an experiment is repeated as often as possible, the reliability of the conclusion drawn from the hypothesis testing will improve and the results can be accepted to be valid.

A single observation/experiment is not valid enough.

Learn more:

Experiments brainly.com/question/5096428

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7 0

3 years ago

Read 2 more answers

A circular loop of wire lies in the plane of the paper. An increasing magnetic field points out of the paper. What is the direct

elixir [45]

Answer:

Option (D)

Clockwise

Explanation:

Using Lenz's Law the current is induced in such a direction so that the magnetic field created due to the current induced opposes the increasing external magnetic field. For this case,when the field is increasing the magnetic flux increases and current is induced in clockwise direction (by lenz law as the induced field due to induced current has influence in opposite direction,thereby it reduces flux).

If the field is being decreasing,current would have been induced counter-clockwise so as to oppose the decreasing flux(as then the induced flux would be in same direction.)

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3 years ago