Rounded to the nearest whole number, how many protons are in an atom of krypton?

A 36

B 48

C 84

D 120

In which of the following situations has work been done? Select one: a. A weightlifter holds a 50kg barbell over his head for 3 minutes. b. A yoga instructor holds a handstand for 1 minute. c.

The law of conservation of matter states that during a chemical reaction, the amount of matter increases. decreases. disappears stays the same

4. How will you find the volume of an irregularly shaped object that would dissolve in water?

Energy is measured in Joules (J). Which other quantity is measured in Joules? a. work b. force c. power d. acceleration

How do you work out velocity using kinetic energy?

What is the concentration of H + ions at a pH = 7?

Suppose that Paul D. Trigger fires a bullet from a gun. Will the speed of the bullet leaving the muzzle will be the same as the speed of the recoiling gun? Explain.

A certain rock contains large jagged pieces of other rocks cemented by fine particles what type of rock is this explain

Could a nucleus that has one proton but no neutrons exist?

Which physical quantities has the unit kg·m·s-1?