Type of current moving one way

Energy is a physical quantity with properties somewhat similar to what other quantity?

Water is sold on half-liter bottles. What is the mass, in kg and in g, of the water in such a full bottle?

When 30 V is applied across a resistor it generates 600 W of heat: what is the magnitude of its resistance?

An atom of hydrogen consists of one proton and one electron, which are separated by a distance of 5.3 x 10^-11 m. What is the magnitude of the electric force? A) 8.2 x 10^-8 N B) 2.9 x 10^-27 N C) 3.6 x 10^-47 N D) 7.7 N

A boy is pulling a wagon with the force of 5N. A girl is pushing on the same wagon in the same direction with a force of 3N. What is the new force acting on this wagon?

A positively charged object will attract an object that has A. a negative charge B. a smaller positive charge C. no charge D. a larger positive charge

Whats the usefulness or inconvenience of frictional force by turning a door knob?

How does the direction of acceleration compare with the direction of the net force that produces it

17. Elaine connects an ammeter to a lamp, which is connected to a battery. She records the current. She connects another battery in series to the circuit and records the ammeter reading again. She repeats this step two more times.

If you have two different sized velocity vectors representing two objects moving in the same direction, then what can you conclude?