Which best identifies the requirements for work to be performed?

A) An object that has a force acting on it.

B) An object that is moving and has no net force

C) A force acting on a motionless object

D) A force that moves an object

A top box labeled X contains 2 circles with plus signs and 2 circles with minus signs. A bottom box labeled Y contains 4 circles with minus signs and 8 circles with plus signs. An arrow Z runs from the bottom box to the top box.

I know that this is a lot to ask for but I am really struggling with these and my teacher is sub-par, feel free to assist with as many or as few as you want, I really appreciate it. A cyclist accelerates down a hill from rest at 1.5 m/s2.

How do you determine the number of significant digits

Which element is a shiny element that conducts heat and electricity

Scientists who study the forces that make and shape planet earth are called

Sound waves can combine to become bigger or smaller true or false

Archimedes supposedly was asked to determine whether a crown made for the king consisted of pure gold (density of gold is 19.3 * 103 kg/m3). According to legend, he solved this problem by weighing the crown first in air and then in water.

What are at least three types of energy involving a microwave

1. At one time, people thought that heat was a substance called

How are magnet'so magnetic force and magnetic field different