Critical mass is the ___ of material required to produce a chain reaction.

A.) minimum amount

B.) atomic mass

C.) precise amount

D.) maximum amount

A motorcycle and rider have a total mass equal to 300kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of - 5 m/s. what is the net force on the motorcycle?

An engine has excessive valve guide wear. Technician A says to ream the guide and install a new valve with an oversized stem. Technician B says to knurl the valve stem and reinstall it in the guide. Who is right? 1. Technician A only. 2.

What is the asthenosphere made out of? a. Solid Rock b. Liquid Rock c. Liquid Iron d. Solid Iron

The number of protons in the nucleus of an atom determines the species of the atom, i. e., the element to which the atom belongs. An atom has the same number of protons and neutrons. But the electron number cannot be used instead because A.

How many zebras automatically survive the first interaction with the lions in Generation 1? A. 10 B. 20 C. 30 D. 50 if the population is 30 prey to 20 predators

What is the Z number of an atom with 9 protons, 8 neutrons, and 7 electrons? 7 8 9 16 17

What is the most dense crust

V is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?

A compound consisting of atoms of small atomic mass is more likely to require

Wave can be described as A. a continuous transmission of energy from one location to the next B. The disturbance of particles in an area C. The transmission of energy through individual particles D. The motion of particles in a medium