A 2.48-Ω resistor is connected across a 9.00-V battery. The voltage between the terminals of the battery is observed to be only 7.78 V. Find the internal resistance of the battery.

If steel is more dense that lake water, why can a boat float

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.