How many additional valence electrons does fluorine need to have a full

valence shell?

A. One

B. Two

C. Eight

D. Seven

Light with a wavelength of 600 nm is incident on a gemstone made of cubic zirconia (ᡦ = 2.18) from air. The light makes an angle of 30° with the surface of the gem before entering it. The refracted ray makes an angle of 30° with the normal.

The ice in his drink has a mass of 6 g and a volume of 20 cm3. what is the density of the ice?

As an object falls freely toward earth, the object's momentum is 1. decreses 2. inceases 3. remains the same,

Which materials produce greater or fewer vibrations on a roller coaster?

What unit must be used what measuring mass?

A person gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. The cart travels forward along the floor, gradually slowing as it moves.

A driver, traveling at 22.0 m/s, slows down her 2.00 x 103 kg car to stop for a red light. What work is done by the friction force against the wheels?

If the masses of an object increase and their distance from each other stays the same the force of gravity decreases increases stays the same increases then decreases

What is Avogadro's number? A. 5.002 Ã - 1020 B. 2.3 Ã - 1021 C. 6.02 Ã - 1013 D. 6.02 Ã - 1023

Mathew, a farmer, cultivates monocultures of wheat. What negative effect will monoculture farming have on Mathew's land? A. crop productivity will decrease B. greenhouse gases will generated C. nutrients will not be recycled back into the soil D.