When using science to investigate physical phenomena, which characteristic of the event must exist?

How far is the sun away from earth

Two sacks contain the same number of identical apples and are separated by a distance r. The two sacks exert a gravitational force on each other that is opposite in direction but with the same magnitude, F.

What affect does distance have on the force of gravity

B. Jerome plays middle linebacker for South's varsity football team. In a game against cross-town rival North, he delivered a hit to North's 82-kg running back, changing his eastward velocity of 5.6 m/s into a westward velocity of 2.5 m/s.

Put the steps in order from 1 to 4 to describe how sound waves travel. Energy is passed from particle to particle. Energy reaches the ear, which allows for hearing. A sound wave is produced when an object vibrates.

A 3,00 kg truck moving at + 10 m/s hits a 1,000 kg parked car in which moves off at + 15 m/s what is the velocity of the truck

Joe noted that the temperature in his aquarium dropped overnight. He concluded that thermal energy moved from the aquarium to the air around it. Does this validate or invalidate the Law of Conservation of energy?

Which of the following describes the magnetic field produced by a current carrying wire? Assume the wire is normal to the page, and that current is flowing into the page. A.) The magnetic field is directly into the page. B.

Name three acids and three bases and list an industrial or household use of each

Electric eels and electric fish generate large potential differences that are used to stun enemies and prey. These potentials are produced by cells that each can generate 0.10 V. We can reasonably model such cells as charged capacitors.