An isotope has the same number of but a different number of than other atoms of the same element.

Define power give its unit

What if the population of rabbits decrease, what would happen with foxes and owls?

Why do oil spills pose a long-term risk?

The Palo Verde Nuclear Power Plant cost about 6 times as much to build as compared to the Solana solar parabolic trough electicity generating facility. Does Palo Verde provide at least 6 times as much energy as Solana?

A rocket lift off the surface of earth with a constant acceleration of 20 m/sec^2. how fast will the rocket be going 1 min latter?

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars