Electric charges that are different

A.) attract each other

B.) repel each other

C.) exist in pairs

D.) do not interact

What is the time lapse between seeing a lightning strike and hearing the thunder if the lightning flash is 47 km away? The speed of light waves in air is 3 * 108 m/s and the speed of sound waves in air is 333 m/s.

A 250 mL sample of nitrogen (N2) has a pressure of 745 mm Hg at 30 C. What is the mass of nitrogen?

A trolley of mass 1000 kg moving at 10 m/s collides and hooks onto another identical trolley at rest. What is the velocity of both the trolleys together?

What units for time must be used in calculating power

Which style of painting is the Peale family known for? A. abstract B. representational C. nonrepresentational

Which of Newton's laws accounts for the following statement? "A force cannot act alone."

Determine the maximum weight of the bucket that the wire system can support so that no single wire develops a tension exceeding 100 lb.

two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?

NaCI is__ an acid a base a salt

A rocky space object of varying size