If a device uses 280 watts of power a day, about how many kilowatt-hours will it use in 30 days?

Answer:

Recoil speed = -100,000 m/s

Explanation:

First, this is an exercise that has relation with angular momentum.

So, you need to use the expressions for momentum.

Now, we can assume that Superman and the asteroid are initially at rest, so both moments are 0.

If superman hurls the asteroid, this means that  he should have an equal moment but in the opposite direction of the asteroid, therefore, he also have an opposite recoil moment.

The expression to use is the following:

innitial momentum = final momentum

The final momentum, is the combination of superman recoil moment, and the asteroid so:

0 = Mass * Velocity

Let M1 and V1 be the mass and velocity of superman, while M2 and V2 would be the asteroid, thus we have:

0 = M1 * V1 + M2 * V2

As the problem states, the asteroid is 1000 times more massive than superman, so we can say that M2 = 1000M1. Replacing in the above expression we finally have:

0 = M1 * V1 + 1000M1 * V2

M1 * V1 = -1000M1V2 -----> Simplify M1

V1 = -1000V2

V1 = -1000 * 100

V1 = -100,000 m/s

This would be the recoil speed of Superman.

Answer:

-100,000m/s

Explanation:

Answer: Gravity

Explanation:  The force that is generated by matter is the gravitational force, is the force that attracts the bits of matter to each other, and is described by the equation:

F = G*(m₁*m₂)/r^2

Where G is the gravitational constant, m₁ and m₂ are the masses of the bits of matter, and r is the distance between them.

The complete paragraph is:

Scientists think that a few hundred million years or so after the Big Bang, space cooled off enough for matter to form. This matter spread out around the universe with no structure. But each little bit of matter exerted the force of gravity on each other a little bit.

Answer:

well it depends of the distance, but u get your frequency and u times it by a round number if im correct

Explanation:

Answer:

50 N is the correct answer.