Which of the following best describes absorption of a wave? a. as a wave reaches the interface between two different media, its direction of motion changes, and it remains in the first medium. b. as a wave moves from one medium into another in which its speed is different, the wave changes direction. c. as a wave moves from one medium to another, the energy of the wave is converted to other forms of energy. d. as a wave moves around a corner or through an opening, its direction of motion changes.

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false

According to the second law of thermodynamics, what is true of entropy in all natural systems? a.it will always decrease. b.it will always increase. c.it will always remain the same. d.it is impossible to measure. e.it will always equal zero.

4.at 0 ºc, some amount of energy is required to change 1 kg of water from a solid into a liquid. if you had a 2 kg piece of ice, what effect would this have on the amount of thermal energy required to change the water from a solid to a liquid? it would require more energy to change solid water into liquid water because there are more molecules in this larger piece of ice. it would still require the same amount of energy to change solid water into liquid water because the entire piece of ice would still gain the same amount of energy in each case. it would require energy to be removed from the 2 kg piece of ice. the larger piece of ice already has more total energy than the smaller piece of ice, so energy must be removed for the ice to become liquid. it would require less energy to change solid water into liquid water because the energy would spread through the ice more quickly and the ice already has a larger total amount of energy because it is larger than a 1 kg piece of ice.