What structure do all of these elements have in common? Boron, Carbon, Nitrogen, Oxygen, Flourine.

A) number of protons

B) numbers of electrons

C) number of energy levels

D) number of valence electrons

What is the atomic mass of carbon-14?

What requires a physical medium in which to travel?

What kind of force pulls a system back to equilibrium

In a vacuum light, waves and radio waves have the same A) frequency B) period C) speed D) wavelength

A charge of 9.0 x 10-5C is placed in an electric field with a strength of 4.0 x 104 N. What is the electrical force acting on the charge?

Is momentum conserved in the collision?

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

In a laboratory, you determine that the density of a certain solid is 5.23*10-6kg/mm3. Convert this density into kilograms per cubic meters.

List the solar objects in correct order from the Sun. Venus Earth Mercury Saturn Neptune Mars Jupiter Asteroid Belt The Sun Uranus

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. The area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?