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lions [1.4K]
3 years ago
13

Which change will always result in an increase in the gravitational force between two objects?

Physics
2 answers:
Anika [276]3 years ago
8 0
The change that will always result in an increase in the gravitational force between two objects is increasing the masses of the objects and decreasing the distance between the objects.
nikdorinn [45]3 years ago
6 0
(a) and (b) can increase the gravitational attraction between two objects
IF you pick the increase and decrease just so, but not always.

(d) will always decrease the gravitational force between them.

(c) is the only choice that will always increase the gravitational force between them, no matter how much the increase and the decrease are.
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The kinetic energy of a rocket is increased by a factor of eight after its engines are fired, whereas its total mass is reduced
Rudik [331]

The momentum increases by a factor of 2

Explanation:

We can solve this problem by rewriting the momentum of the rocket in terms of the kinetic energy and the mass.

The kinetic energy of the rocket is:

K=\frac{1}{2}mv^2 (1)

where

m is the mass

v is the velocity

The momentum of the rocket is

p=mv (2)

From eq.(1) we get

v=\sqrt{\frac{2K}{m}}

and substituting into (2),

p=\sqrt{2mK}

Now in this problem we have:

- The kinetic energy of the rocket is increased by a factor 8:

K' = 8K

- The mass is reduced by half:

m'=\frac{m}{2}

Substituting, we find the new momentum:

p'=\sqrt{2(\frac{m}{2}(8K)}=\sqrt{4(2mK)}=2\sqrt{2mK}=2p

So, the momentum increases by a factor of 2.

Learn more about momentum and kinetic energy:

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4 0
3 years ago
A typical wall outlet voltage is 120 volts in the United States. Personal MP3 players require much smaller voltages, typically 2
butalik [34]

Answer:        

Number of turns in secondary will be 7

Explanation:

We have given primary voltage V_p=120volt

Number of turns in the primary is N_p=3575

Secondary voltage is given V_s=235mV=0.235volt

We have to find the number of turns in secondary

We know that \frac{N_p}{N_s}=\frac{V_p}{V_s}

So \frac{3575}{N_s}=\frac{120}{0.235}

N_s=6.60

As the number of turns can not be in decimal so number of turns will be 7

6 0
3 years ago
Which best describes a difference between laser light and regular light?
Mashcka [7]

Answer:

B

Explanation:

6 0
2 years ago
In order to move a object must have energy.<br><br> True or false and why
andriy [413]

Answer:

True

Explanation:

4 0
2 years ago
Hurry need an answer
notsponge [240]

Answer:

i think b

Explanation:

6 0
3 years ago
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