5. On the periodic table, which families are in the first period?

a

An expert archer tried to shoot an arrow into a target lying at the bottom of a shallow pool. Even though the water did not change the direction of the arrow, the archer missed the mark by several inches.

Solar cells are used to a. photograph sunspots. b. convert sunlight into electricity. c. convert sunlight and carbon dioxide into sugars. d. convert electricity into solar energy.

Which of the following is a vector quantity? a. displacement b. luminosity (brightness) c. mass d. temperature

A homing device left its home to deliver a message. On takeoff, the device encountered a tailwind of 14 mph and made the delivery in 5 minutes. The return trip into the wind took 10 minutes. How fast could the device fly in still air?

A certain metal having a work function of 5.4 eV is illuminated with light of frequency 2.7 x 1015Hz. Determine the stopping potential (in V) that is required to stop the most energetic ejected electrons.

Explain why you poured the water into water before you identify the smell?

The force you exert on machine is called the?

22 What will NOT pollute the groundwater? F Motor oil spillage G Compost production H Injected radioactive waste J Lawn fertilizers

What is the oxidation state of a hydrogen atom bound to an iron atom.?

What evidence can you present for the possibility of time travel?