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3 years ago

What effect would decreasing the distance between objects have on their gravitational attraction to each other?

2 answers:

8 0

Decreasing the distance between objects will result in a greater gravitational attraction between each other. This is because the distance is inversely related to the gravitational attraction. For instance, in the same way, if the distance between two objects was increased, then their gravitational attraction to each other would decrease.

Lady_Fox [76]3 years ago

5 0

Decreasing the distance between two objects having a considerable mass would increase the attraction on gravitation. The reverse is true that if you separate or inrease the objects distance would substantially decrease their gravitational attraction. Most object in our planet is held by its gravitational force towards it's center.

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CaHeK987 [17]

It is A or D but I believe A

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3 years ago

Discuss how does a Van de Graaff generator works?

Svetllana [295]

Answer:

How does a Van de Graaff generator works?

A Van de Graaff generator pulls electrons from the Earth, moves them along a belt and stores them on the large sphere. These electrons repel each other and try to get as far away from each other as possible, spreading out on the surface of the sphere. ... It provides a convenient path for electrons to move to the ground.

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scienceworld.ca

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3 years ago

A bullet fired horizontally hits the ground in 0.5 sec. If it had been fired with a much higher speed in the same direction, and

stira [4]

Answer:

3. 0.5 sec.

Explanation:

A bullet fired horizontally follows a projectile motion, which consists of two independent motions:

- A horizontal motion with constant speed

- A vertical motion with constant acceleration, g = 9.8 m/s^2, towards the ground

The time taken for the bullet to reach the ground can be calculated just by considering the vertical motion:

$y(t) = h + v_{0y} t - \frac{1}{2}gt^2$

where y is the vertical position at time t, h is the initial height, and $v_{0y}$ is the initial vertical velocity of the bullet.

Since the bullet is fired horizontally, $v_{0y}=0$ . So the equation becomes

$y(t) = h - \frac{1}{2}gt^2$

And the time that the bullet takes to reach the ground can be found by requiring y=0 and solving for t:

$t=\sqrt{\frac{2h}{g}}$

As we can see, in this equation there is no dependance on the initial speed of the bullet: therefore, if the bullet is fired still horizontally but with a different speed, it will still take the same time (0.5 s) to reach the ground.

4 0

3 years ago

If you heat a thin, circular ring in the oven, does the rings hole get larger or smaller?

KiRa [710]

Unless the ring by design will have restriction for any outward expansion. The hole will get larger / bigger as you heat this up. The more you heat an object the more it expands, thus the larger the hole gets. The only case is when outward expansion is restricted, the expansion will be inward as it is the only direction the ring can expand to.

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3 years ago

Explain why it is important to create measurable goals.

ANTONII [103]

Answer:

it is important to create measurable goals bc :

To determine the point at which the goal has been achieved.
It can also help improve motivation allowing an individual to track the progress towards the goal.

hope it helps!

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3 years ago

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