Explain the difference between variables and controls in a scientific experiment. what is the purpose of a control?

A 0.14-kg pinecone is 16m above the ground. What is it's gravitational potential energy

When the surfaces of two semi-infinite solids at different uniform initial temperatures are brought into intimate contact with each other, the following statements are correct: The heat flux from one surface equals that into the other.

Which of the following is an example of an electromagnetic wave? A. ripples on a lake B. the honking of a car horn C. the light from a neon sign D. aftershocks from an earthquake

A boy is exerting a force of 70 N at a 50-degree angle on a lawn mower. He is accelerating at 1.8 m/s2. Round the answers to the nearest whole number. What is the mass of the lawn mower? kg What is the normal force exerted on the lawn mower? N

A particle is moving along a projectile path where the initial height is 96 feet with an initial speed of 16 feet per second. What is the maximum height of the particle?

1. Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series.

What is the study of motion of objects, and related concepts of force and energy

Sliding friction definition

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?