Electric charges that are different

A.) attract each other

B.) repel each other

C.) exist in pairs

D.) do not interact

Suppose air resistance does not exist, roughly what would be the velocity of a 10 lb object 5-seconds into free fall off of a 500-m building? How is this answer 50 m/s?

Describe the relationship between joules, meters, and newtons

Four identical metallic objects carry the following charges: + 1.51, + 6.28, - 4.69, and - 9.07C. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated.

5. A certain spring that obeys Hooke's Law stretches 30 cm when a load of 0.35 N is added to it. How much energy is stored in the spring when it is compressed 5.0 cm?

17. 1 micrometer (1 µm) equals: A. 10-^3 m B. 10-^6 m C. 10^3 m D. 10^6 m

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.