In temperate climates like Illinois, how many times do lakes "turnover"? Question 12 options: once - in summer twice - in spring and fall twice - in summer and winter once - in fall Question 13 (1 point) Listen While cooking on the stove, you leave a spoon in the pot while it is simmering. When you grab the spoon, it is very hot. This is an example of which of the following? Question 13 options: conduction turnover convection radiation Question 14 (1 point) Listen You spend a couple hours suntanning in your backyard. What form of heat transfer does this describe? Question 14 options: conduction coppertonection convection radiation Question 15 (1 point) Listen Which type of engine provides adequate mixing of air and fuel and requires a spark for combustion? Question 15 options: gasoline diesel neither Question 16 (1 point) Listen As you travel to higher elevations, air pressure is decreased. As pressure decreases, the boiling temperature of water decreases. How does bringing water to a boil to cook mac 'n cheese in the mountains compare to on the beach along the ocean? Question 16 options: Water boils faster in the mountains Water boils faster at sea level Water boils at the same temperature in both locations Question 17 (1 point) Listen Every object emits what type of radiation? Question 17 options: microwave xray ultraviolet infrared Question 18 (1 point) Listen Which of the following best describes how regenerative braking works in hybrid cars? Question 18 options: When the car accelerates, the brakes capture kinetic energy to charge the batteries. Electric motors are run backwards to assist in braking, using the energy (that is typically lost to heat) to charge batteries. The brakes create heat that raises the temperature of the batteries to increase their internal energy. Increased air resistance spins electric generators beneath the vehicle to generate higher top speed. Question 19 (1 point) Listen Which of the following is TRUE regarding residential geothermal heating and cooling? Question 19 options: In the summer, heat is absorbed in the house above ground and released in the colder ground. In the winter, cold is removed in the house above ground and released into the warmer ground below. In the summer, cold is absorbed from below ground and released in the house above ground. In the winter, heat is absorbed in the house above ground and released in the colder ground. Question 20 (1 point) Listen From a purely physics perspective, what is the function of clothing? Question 20 options: Clothing decreases the rate at which cold transfers from the surrounding air to your warmer body. Clothing traps cold near your body to increase heat transfer through convection from surrounding air to your body. Clothing increases convective heat transfer from your warm body to the cooler surrounding air. Clothing traps heat near your body that is otherwise transferred through convection from your warm body to cooler surroundings.