Why do cars tires need more air in the winter then in the summer?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above