What power is needed to lift a 49-kg person a vertical distance of 5.0 m in 20.0 s?

Meteors can be found in the

What happens to the rock structure during each of type of change?

What two types of evidence are used to classify orgianisms?

What is a difference between a divergent boundary and a convergent boundary

A subway train is traveling north at a speed of 35 km/h while a passenger walks south through the train at a speed of 2 km/h. From the passenger's frame of reference, how fast is she traveling in relation to the train?

I can't figure this out, I could use an explanation too! A speeding truck travels in the positive x direction. It hits a car traveling in the positive y direction. The vehicles are deformed and travel together at an angle θ with the positive x-axis.

Based on your knowledge of the electromagnetic spectrum, why are radio waves considered harmless while ultraviolet waves and x-rays considered harmful?

What is great summary in physical science?

Does ice melt faster in water or air

Why are stars changing colurs by blinking?