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Rina8888 [55]
3 years ago
5

What is heat? I need help

Physics
1 answer:
emmasim [6.3K]3 years ago
4 0
Something hot like a fire , an eye of a stove , and the sun
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Calculate the period (T) of uniform circular motion if the velocity is 40.0 m/s and centripetal acceleration is 20.0 m/s2.
kirill [66]
T is the time for a whole round.

centripetal acceleration = V^2/R,

20 = 40^2 / R, find R = 40^2/20 = 40*40/20 = 80 m, right?

Now, one round is L = 2*pi*R = 2*pi*80 = 160*pi

And T = L/v (distance/speed) = 160*pi/40 = 4*pi seconds, or ~ 12.57 s
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3 years ago
Two satellites are orbiting earth at different altitudes. Which satellite orbits at a higher speed v around earth?
aniked [119]

Answer:

Low satellite has high orbital velocity

Explanation:

let v be the orbital speed of the satellite orbiting at a height h is given by

v=\sqrt{\frac{GM}{R+h}}

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here we observe that more be the height lesser be the orbital velocity.

So, a satellite which is at low height has high orbital velocity.

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An engineer is working on a new kind of wire product that is about the size of a bacterium cell. Which kind of technology is the
solong [7]

Microtechnology i hope this will help

4 0
3 years ago
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Which of the following is likely to have the lowest viscosity? hot oil room temperature oil room temperature water below room te
Zanzabum
The answer should be hot oil

5 0
3 years ago
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4. Which of the following would be a good reference point to describe the motion of a dog?
saul85 [17]

ANOTHER RUNNING DOG

Explanation:

In the given question it is to find a suitable reference point to describe  the motion of dog. Here I could suggest that it is better to compare the dog with  another running dog to create the relative speed difference to get a reliable motion variation.

Because the motion of dog is in the linear with respect to the another dog and to the acceleration produced by the dog in the required interval is easy to calculate with respect to  another dog which is already in motion.

Hence, I suggest that Motion of dog can be analysed better by analyse the motion variation of dog with  another dog running.

4 0
3 years ago
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