When an element tends to lose its valence electrons in chemical reactions, it behaves more like a

A box is sliding along a frictionless surface and gets to a ramp. Disregarding friction, how fast should the box be going on the ground in order to slide up the ramp to a height of 2.5 meters, where it stops? (Use g = 9.8 m/s2.)

A skydiver jumps from a plane. Assuming she is not slowed by air resistance, what is her speed after falling 10m? (Round g to 10m/s2).

A cell is classified as eukaryotic if the cell A. has a cell wall. B. contains a nucleus. C. contains chloroplasts. D. lives in the absence of oxygen.

What three tests must all theories pass to be considered a proven theory?

A railway train 50 m long passes over a bridge 250 m long at the rate of 12 km/h. How long will it take completely pass over the bridge?

You did 150 joules of work lifting a 120 - N backpack. how high did you lift the backpack? how much did the backpack weigh in pounds

After the layers of sediment are deposited in one place, they are

A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the tank if it is 0.500-m wide by 0.900-m long, given that the density of gasoline is 6.8 x 102 kg/m3

Which statement best describes the kinetic theory of matter? Matter is made up of compounds that are in constant motion and have energy. Matter is made up of particles that seldom move and do not possess energy.

Why can we see our breath on a cold winter day