A child on roller skates pushes off against the wall with a force of 40N. How far must the child push themselves away from the wall (starting from rest), so that his final kinetic energy is 275J?

Why does a smaller car get better gas mileage than a bigger one?

The capacitance of A conductor is affected by the presence of A second conductor that is uncharged and isolated electrically. Why?

Metamorphic rocks with a banned appearance due to the alignment of minerals are

Energy firm the sun is transferred to earth trough convection

Which of the following relationships is correct? a. Relative humidity increases: a decrease in temperature without a change in the amount of water vapor in the atmosphere. b.

Based on the number of valence electrons, what is the correct formula when nitrogen bonds to hydrogen? A) NH2 B) NH3 C) NH4 D) N2H

Choose the correct statement about the currents through the elements. Choose the correct statement about the currents through the elements. The currents in series-connected elements are not the same and depend on a current or a voltage source.

5 potential causes of infertility

Suppose you place a ball in the middle of a wagon, and then accelerate the wagon forward. Describe the motion of the ball relative to the ground. - Describe its motion relative to the wagon.

Water is poured into a container that has a leak. The mass 'm' of the water is given as a function of time 't' by, m=5t^0.8 - 3t + 20, with t>=0, mass in grams and t in seconds a. at what time is the water mass greatest, and b.