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4 years ago

What will keep the gravitational force between two objects unchanged?

Physics

1 answer:

Luden [163]4 years ago

6 0

The gravitational force between two objects is determined by

-- the product of their masses, and

-- the distance between their centers.

If you want to keep the gravitational force between two objects unchanged, then you can make changes to the mass of one object, the mass of the other object, and the distance between them, BUT you have to be very careful to always keep the quantity

(one mass) x (the other mass) / (the distance)²

the same, unchanged number. This means that if you change one thing, you'll have to change something else to keep that expression constant.

For example: If one of the masses suddenly somehow becomes 4 times as great, then you can EITHER change the other mass to 1/4 of its original mass, OR move the two objects twice as far apart.

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A submerged submarine alters its _____ to rise or fall in the water.

Dima020 [189]

Are there any answer choices?
Submarines use buoyancy by filling ballast tanks up with water. When they are filled with water, they are more dense than the surrounding water, so they are able to sink. If they want to rise, they fill these tanks up with air so that the density is less than the water it surrounds.
Hope this helps! :)

3 0

4 years ago

Read 2 more answers

If the sun had twice the mace how would that affect the gravitational force of the sun

daser333 [38]

Answer: Gravity is the force that keeps planets in orbit around the Sun. Gravity alone holds us to Earth's surface.

Planets have measurable properties, such as size, mass, density, and composition. A planet's size and mass determines its gravitational pull.

A planet's mass and size determines how strong its gravitational pull is.

Models can help us experiment with the motions of objects in space, which are determined by the gravitational pull between them.

Explanation:

5 0

3 years ago

2. An airplane traveling north at 220. meters per second encounters a 50.0-meters-per-second crosswind

Alex777 [14]

The resultant speed of the plane is (3) 226 m/s

Why?

We can calculate the resultant speed of the plane by using the Pythagorean Theorem since both speeds are perpendicular (forming a right triangle).

So, calculating we have:

$ResultantSpeed=\sqrt{VerticalSpeed^{2}+HorizontalSpeed^{2}}\\\\ResultantSpeed=\sqrt{(220\frac{m}{s})^{2}+50\frac{m}{s})^{2}$

$ResulntantSpeed=\sqrt{48400\frac{m^{2} }{s^{2} }+2500\frac{m^{2} }{s^{2} } } \\\\ResultantSpeed=\sqrt{50900\frac{m^{2} }{s^{2} }}=226\frac{m}{s}$

Hence, we have that the resultant speed of the plane is (3) 226 m/s

Have a nice day!

5 0

3 years ago

A high-speed drill rotating ccw at 2400 rpm comes to a halt in 2.5 s. What is the magnitude of the drill’s angular acceleration?

WARRIOR [948]

Answer:

The magnitude of the drills angular acceleration is $-32\pi s^{-2}$ .

The drill makes 50 revolutions before it stops.

Explanation:

The revolutions that the drill makes in 1 second is

$\dfrac{2400\:rev}{60s} =40\:rev/s$

And the angular velocity is

$\omega= \dfrac{40 (2\pi )}{1s}$ (one revolution is $2\pi$ radians)

$\boxed{\omega =80\pi\:s^{-1}}$

Now, the drill comes to a halt in 2.5 s, which means the magnitude of it's angular acceleration is

$a= \dfrac{\Delta \omega}{\Delta s}$

$a=\dfrac{80\pi-0 }{0-2.5s}$

$\boxed{a=-32\pi \:s^{-2}}$

In other words, the magnitude of the angular acceleration is $-32\pi\: s^{-2}.$

Now, we find the angular displacement of the drill which is given by the equation

$\theta = \omega t +\dfrac{1}{2} \alpha t^2$

putting in $\omega = 80\pi s^{-1}$ , $\alpha = -32\pi s^{-2}$ , and $t=2.5s$ , we get:

$\theta = (80\pi s^{-1} *2.5s)+\dfrac{1}{2} (-32\pi s^{-2})(2.5s)^2$

$\theta = 100\pi$

which is

$\dfrac{100\pi }{2\pi } =50\:rev$ (one revolution is $2\pi$ radians)

50 revolutions.

In other words ,the drill makes 50 revolutions before it stops.

3 0

3 years ago

When a river flows into an ocean, it slows down and deposits materials in its alluvial fan/delta

nikklg [1K]

When a river flows into an ocean, it slows down and deposits materials in its delta

8 0

3 years ago