What are forces? (Check all that apply) -Push or pull

-An action that has the ability to change potion

-Actions that can increase or decrease the speed of a moving object

-Actions that can change the direction in which an object is moving

-Gravity

-Electromagnetic

-Strong Nuclear Force

-Weak Force

-Matter

How would doubling the made of an object change the objects potential energy

Positrons are spontaneously emitted from the nuclei of

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.