Which element has 7 valence electrons? A. nitogen (N) B. neon (Ne) C. lithium (Li) D. chlorine (CI)

Choose the 200 kg refrigerator. Set the applied force to 400 N (to the right). Be sure friction is turned off. What is the net force acting on the refrigerator?

If a cheetah can run with an average velocity of 90 km/h, how far can it travel in 30 seconds? O A. 60 km O B. 4 km O C. 0.4 km O D. 0.75 km

Which lists these metals in order from most reactive to least reactive? calcium, magnesium, strontium

What best describes an impulse acting on an object

How is potential energy unique?

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must it now head so that its resultant displacement will be 125 km directly east of Guam?

What is the molecular geometry of a methane (CH4) molecule?

Why do scientist use radioactive decay to figure out how old stuff is

The power of a machine measures A. its rate of doing work. B. its strength. C. the force it produces. D. the work it does.