Which material is the best conductor of thermal energy? O A. Metal O B. Rubber O C. Glass O D. Plastic

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?