Which of the following is an explanation of how the natural world works, based on experimentation?

An analysis

A law

An opinion

A theory

An electron experiences a force of 100 N when it is moving through an electric field. Calculate the electric field strength.

What two simple machines are found in a bike?

Why would a person choose to tie a helium-filled balloon to a child's wrist instead of simply having the child hold on to it? A. Helium is less dense than air, so it will float above air if the child lets go of the balloon. B.

How do you find period when you have frequency

An object is moving velocity 23m/s. It accelerates to a velocity of 85m/s over a time of 8.3s. What acceleration did it experience?

a boy stands 80m in front of a tall cliff and produces sound by clapping two planks together. A girl standing next to him time the return of the echo at 0.5. how fast does sound wave travel in this place

Can you change your mass without changing your weight?

As soon as parachute of a falling soldier opens, how will the accleration change?

Which type of energy is stored energy? A. Potential B. Kinetic C. Magnetic D. Mechanical

Which of these situations would NOT qualify as a perfectly inelastic collision? A. A frog that jumps onto and sits on a lily pad. B. A bowling ball that knocks pins out of its way as it rolls down a lane C.