Well, first of all, 10³⁰ kg is its mass, not its weight.
-- Density of anything is (its mass) divided by (its volume).
-- You know the white dwarf's mass.
-- The volume of any sphere is (4/3) (pi) (radius)³
-- The radius is 1/2 of the diameter.
-- Now you have the ball. Run with it.
I did it quickly and got (1.91 x 10¹²) kilogram/meter³ .
That may be wrong. You have to check it. And even
if it's correct, you probably want to express density in
units of gram/cm³ the way everybody always does.
Answer:
Explanation:
Given:
- mass of solid cylinder,
- diameter of cylinder,
- mass of bucket of water,
<em>When the bucket is released to fall in the well, it fall under the acceleration due to gravity.</em>
We have formula for angular acceleration as:
where:
g = acceleration due to gravity
r = radius of the cylinder
Answer:
kinetic energy is the answer
Answer:
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Explanation:
Answer:
At 400 m the potential energy of the mountain climber doubled the initial value.
Explanation:
Given;
initial height of the mountain climber = 200 m
final height of the mountain climber, = 400 m
The potential energy of the mountain climber is calculated as;
Potential energy, P.E = mgh
At 200 m, P.E₁ = mg x 200 = 200mg
At 400 m, P.E₂ = mg x 400 = 400mg
Then, at 400 m, P.E₂ = 2 x 200mg = 2 x P.E₁
Therefore, at 400 m the potential energy of the mountain climber doubled the initial value.
