Which statements correctly describe the effect of distance in determining the gravitational force and the electrical force? check all that apply.

the gravitational force has an infinite reach.

the electrical force has an infinite reach.

the gravitational force is inversely proportional to the distance.

the electrical force is inversely proportional to the distance.

the gravitational force is inversely proportional to the square of the distance.

the electrical force is inversely proportional to the square of the distance.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?