The upward force on an object falling through the air is?

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Answer 1

Answer: The thing that pushes the object up while it is falling is air. This force is known as "air resistance".

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A child holds up a silver spoon and is surprised to see her reflection there. Which interaction between light and matter explains this?A. When light hits something relatively flat, smooth, and shiny, it is transmitted by the surface, allowing nearby objects to be seen on the surface. B. When light hits something relatively flat, smooth, and shiny, it is refracted by the surface, allowing nearby objects to be seen on the surface. C. When light hits something relatively flat, smooth, and shiny, it bounces off the surface, allowing reflected objects to be seen on the surface. D. When light hits something relatively flat, smooth, and shiny, it is absorbed by the surface, allowing refracted objects to be seen on the surface.

A 2.00x10^6 hertz radio signal is sent a distance of 7.30x10^10 meters from earth to a spaceship orbiting Mars. How much time does it take for the radio signal to travel from earth to the spaceship

Answers

Answer:

It takes $2.43* 10^2$ for the radio signal to travel from earth to the spaceship.

Explanation:

Given:

The frequency of the radio signal = $2.00 * 10^6$ hertz

Distance = $7.30* 10^10$ meters

To Find:

The time taken for the radio signal to travel from the earth to the spaceship= ?

Solution:

we know that the time taken can be found by dividing the distance travelled by the speed at which the signal travels

$Time = (Distance)/(Speed)$

Here the speed of the radio signal is equal the the speed of light

Now substituting the values,

Time taken is

=> $Time = (7.30* 10^10)/(3 * 10^8)$

=> $Time = 2.43* 10^(10-8)$

=> $Time = 2.43* 10^2$

The time taken for the 2×10⁶ Hz radio signal to get to the spaceship from Earth is 243.33 s

What is speed?

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

How to determine the time

Speed of radio signal = 3×10⁸ m/s
Distance = 7.3×10¹⁰ m
Time =?

speed = distance / time

3×10⁸ = 7.3×10¹⁰ / time

Cross multiply

3×10⁸ × time = 7.3×10¹⁰

Divide both sides by 3×10⁸

Time = 7.3×10¹⁰ / 3×10⁸

Time = 243.33 s

Learn more about speed:

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A physical property that describes how something feels
Is called?

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It's called texture, meaning how something feels.

Why do faults often occur along plate boundaries?

Answers

Earthquakes can also occur far from the edges of plates, along faults. Faults are cracks in the earth where sections of a plate (or two plates) are moving in different directions. Faults are caused by all that bumping and sliding the plates do. They are more common near the edges of the plates.

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Identify the cause of foliation in rocks?

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When minerals are exposed to high pressure and temperatures, the individual minerals begin to realign themselves

Do I have to be good at math to be a physicist?

Answers

Yes, It does require some math skills.

How to do the equation p1v1 = p2v2 as an equation layed out like:P1V1=P2V2
equation
answer
for the question "A sealed of gas at 101,000 Pa is expanded, reducing the volume from 0.5m3 to 0.25m3."

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P1 and P2 are the pressures, and V1 and V2 are the volumes. So you take the first pressure and volume you are given and place them into the equation P1V1 so the first part of the equation would be 101000*0.5 = P2V2. You then rearrange the equation to find what you want, in this instance you would do 50500/0.25 = P2... therefore P2 = 2020000Pa or 2.02*10^6Pa

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