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

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Select the correct answer from each drop-down menu. compared to its surroundings, the concentration of solutes is low inside a cell. so, the cell is with respect to its surroundings. a particular solute in this cell uses energy for its transport from the cell to its surroundings. this type of transport is called

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?