Why are chemical changes considered "unseen"?

If a 1000-kg car was moving at 30 m/s, what would be its kinetic energy expressed in the unusual (for kinetic energy) units of calories? (1 cal = 4.186 J) a. 3.0 * 104 b. 9.0 * 105 c. 3.8 * 106 d. 1.1 * 105

Suppose a baseball and a marble are dropped att the same time from the same height. which ball would land first according to aristotle explain

What is the symbol for velocity

What is the difference between a parallel circuit and a series circuit

Which sentence avoids using a pronoun reference error? They say it's going to rain this weekend. It's going to rain this weekend. Pick your coat up off the floor and vacuum it. none of the above

Person with a mass of50 kg jumps up from the earth with an acceleration of 20 newtons. what is his acceleration?

The electron are accelrated to a speed of 2.40*10^7 in 1.8*10^-9, the force experinced by an electron?

You are given two positively charged particles, of equal magnitude, separated by a distance, "d". What will happen to the force field between the two particles when "d" is doubled?

Was ruthersfords model of an atom incorrect or incomplete

Which sphere is NOT a part of the cycling of oxygen through Earths systems?