Atable has several directional compasses, several lengths of wire, a battery, an ammeter, a light bulb, a battery holder and a rubber eraser.
a student is asked to create an electric motor. looking at the materials provided, what other materials would they need?
a) an armature
b) an iron nail.
reactivate
c) a permanent magnet
reactivate
d) an electric generator.

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.