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4 years ago

Please, please, please help me!!!!!!

Physics

1 answer:

grin007 [14]4 years ago

6 0

The force exerted by the 25 Kg mass on the 42 Kg mass is equal to the force that the 42 Kg mass exerts on the 25 Kg mass, and that force is inversely proportional to the square of the distances between their centers of mass.

In short, Your Answer would be Option C

Hope this helps!

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Is the alien theory a scientific claim? Why or why not?

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I'm not sure what the alien Theory says or if there really is such a theory. If the theory says that aliens definitely exist and that they have visited Earth in the past then the theory is totally and completely without any kind of support. It's not scientific in any way because there is no evidence for such a claim. It may be thought to be probable but no solid evidence has ever been presented.

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3 years ago

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A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counter

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Answer:

D &B

Explanation:

Using Fleming right hand rule that States that if the fore-finger, middle finger and the thumb of left hand are stretched mutually perpendicular to each other, such that fore-finger points in the direction of magnetic field, the middle finger points in the direction of the motion of positive charge, then the thumb points to the direction of the force

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4 years ago

Suppose you are in a moving car and the motor stops running. You step on the brakes and slow the car to half speed. If you relea

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Answer:

See the answer below

Explanation:

If you step on the brake of a car while driving, the frictional force between the tires of the car and the surface of the road increases in opposition to the motion of the car. Consequently, the car slows down.

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3 years ago

George Washington Gale Ferris, Jr., a civil engineering graduate from Rensselaer Polytechnic Institute, built the original Ferri

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Answer:

$KE = 4217 J$

Explanation:

As we know that the wheel is rotated at constant angular speed

so here we can say that the angular speed is given as

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{2 \times 60}$

$\omega = 0.052 rad/s$

now the moment of inertia of all passengers is given as

$I = 36(60)(\frac{76}{2})^2$

$I = 3119040 kg m^2$

now work done by machine must be equal to kinetic energy of the system

so we will have

$KE = \frac{1}{2}I\omega^2$

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$KE = 4217 J$

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3 years ago

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T = 29.5° C. To determine how far you are aw

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Answer:

<em>The canyon is approximately 314 meters away</em>

Explanation:

<u>Speed of Sound</u>

If we emit sounds in an open space where a large obstacle (like a mountain) is expected to return the sounds, then it will travel forth and back at a given speed for a certain time. We can assume the speed of sound is constant, so we could know the approximate distance of the mountain (or canyon in our case) by the known formula.

$x=v_st$