What are the two forces involved when a machine is used?

-friction and density

-potential and kinetic

-input and output

-gravity and friction

Indentify two cities on the map where measurements of the altitude of Polaris are within one degree of each other

An apple in a tree has a gravitational potential energy of 175J and a mass of 0.36g. how high from the ground is the apple

If an element has 3 electrons how many of them will be in the second energy level?

What evidence did Alfred Wegener use to support his theory of continental drift?

Which two layers of Earth are mainly composed of iron and nickel? inner core outer core lower mantle upper mantle crust

An object starts from rest and falls freely for 40. meters near the surface of planet P. If the time of fall is 4.0 seconds, what is the magnitude of the acceleration due to gravity on planet P?

Consider two metallic rods mounted on insulated supports. One is neutral, another positively charged. The charged rod is brought close to the neutral one (no touching!

Which term identifies the dark smooth areas on the surface of the moon? craters terrae maria regolith

1. work is a transfer of 2. a small 20-killogram canoe is floating downriver at a speed of 2 m/s. what is the caanoes kinetic energy?

If you are asked to determine an objects speed, what information must you have? A: distance and period of time B: distance and direction C: period of time and direction D: distance and change in position