How many valence electrons are in an atom of fluorine

A. Two

B. Seven

C. Nine

D. Seventeen

Why do we say "work done" and "energy change"

A cubic meter is equal to the volume of? a. a cube that measures one cm3 on each side b. a dude that measures one cm in each side c. a cube that measures one meter on each side. d. a cube that measures one mL on each side

What statement about the salinity of ocean water is true? A.) The salinity of seawater decrease as one moves from the surface to the depths of the ocean. B.) The salinity of surface ocean water does not change from latitude to latitude. C.

Describe what causes day and night

A system does 300 J of work at the same time that 1000 J of energy is transferred to the system as heat. What is the change in the system's internal energy?

To stretch a certain nonlinear spring by an amount x requires a force F given by F = 40 x - 6 x 2, where F is in Newtons and x is in meters.

A wave passes through an opening in a barrier. The amount of diffraction experienced by the wave depends on the size of the opening and the wave's (1) amplitude (3) velocity (2) wavelength (4) phase

Balanced - Forces acting on an object are balanced if the ... If forced on an object are balanced then the object cannot be ...

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100