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3 years ago

I need help on #18. Thanks! :)

Physics

1 answer:

serg [7]3 years ago

4 0

There are two kinds of electrical charge.
We call them 'positive' and 'negative' ... I guess nobody ever thought of better names.

One basic law of electric charges is:

Two of the same kind of charge repel each other.
One of each kind of charge attract each other.

Electrons all carry a negative charge.
So two electrons carry the SAME kind of charge, and so repel each other.

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On a smooth horizontal floor, an object slides into a spring which is attached to another mass that is initially stationary. Whe

HACTEHA [7]

Answer:

E) momentum and mechanical energy

Explanation:

In the context, an object is attached to the another mass with a spring which is initially at a rest position. Now when the spring is compressed, the two masses moves with the same speed. Now since the both the masses combines with the spring to move together they are considered as one system and in this case the momentum and the kinetic energy will be conserved.

The kinetic energy and momentum of the system after collision and the kinetic energy and momentum of the two masses before collision will be constant.

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3 years ago

Which formulas have been correctly rearranged to solve for radius? Check all that apply. r = GM central/v^2 r =fcm/v^2 r =ac/v^2

jek_recluse [69]

The orbital radius is: $r=\frac{GM}{v^2}$

Explanation:

The problem is asking to find the radius of the orbit of a satellite around a planet, given the orbital speed of the satellite.

For a satellite in orbit around a planet, the gravitational force provides the required centripetal force to keep it in circular motion, therefore we can write:

$\frac{GMm}{r^2}=m\frac{v^2}{r}$

where

G is the gravitational constant

M is the mass of the planet

m is the mass of the satellite

r is the radius of the orbit

v is the speed of the satellite

Re-arranging the equation, we find:

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

Learn more about circular motion:

brainly.com/question/2562955

brainly.com/question/6372960

#LearnwithBrainly

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3 years ago

Read 2 more answers

If earth had no landmasses, then the idealized zonal precipitation pattern would have _______.

inysia [295]

If the planet earth has no land masses, the idealized zonal precipitation pattern would likely have regions that are wet in the equator and there will be more of mid-latitudes if the earth has no land masses at all and it does not exist.

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4 years ago

Why do people eat bo oty

IRINA_888 [86]

Answer: I don't know my dude

Explanation:

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3 years ago

Beginning 145 miles directly south of the city of Hartville, a car travels due west. If the car is travelling at a speed of 42 m

ziro4ka [17]

Answer:

The rate of change of the distance is 14.89.