Calculate the energy needed to heat 4 kg of water from 25°C to 45°C.

heat =

80 Kcal

100 Kcal

180 Kcal

280 Kcal

A gust of wind blows an apple from a tree. As the apple falls, the force of gravity on the apple is 9.39 N downward, and the force of the wind on the apple is 1.54 N to the right. What is the magnitude of the net external force on the apple?

Match each term to its definition. element compound ion isotopes cation anion A. substance made of just one type of atoms B. a positively charged ion resulting from the loss of electrons C.

If white light illuminates a diffraction grating having 790 lines/mm, over what range of angles does the visible m = 1 spectrum extend?

Josh is much bigger than taylor. after the push, which of the two is moving faster?

Only a small amount of the energy used in an incandescent light bulb (regular bulbs commonly used in households) is actually converted into light. What happens to the rest of the energy

Determine the magnitude of the acceleration for the speeding up phase.

A battery is used to?

A person riding on the roof of a freight train throws a ball forward. (a) If we ignore air drag and relative to the ground, is the ball moving faster or slower when the train is moving than when it is standing still?

Lemonade powder is stirred into water until it dissolves. Which are true statements? Check all that apply. A. Lemonade is the solute. B. Water is the solvent. C. Lemonade is the solvent. D. Water is the solute.

A skateboarder is accelerating forward. How would his acceleration change if he had more mass? A. His acceleration would decrease. B. His acceleration would be zero. C. acceleration would stay the same. D. acceleration would increase.