Byrd has a mug of coffee at a temperature of 93°C. He sets the mug on a counter in a room with an air temperature of 25°C. What is most likely to happen to the temperature of the coffee?
Type Answer HERE:
The temperature of the coffee will decrease.
Byrd has a mug of coffee at a temperature of 93°C. He sets the mug on a counter in a room with an air temperature of 25°C. What is most likely to happen to the temperature of the coffee?
Type Answer HERE:
a. The hot coffee will transfer thermal energy into the air, and the energy transfer will continue until the coffee is at room temperature.
b. The air will transfer thermal energy into the coffee, and the energy transfer will continue until the coffee is at room temperature.
c. The hot coffee will transfer thermal energy into the air and will continue to transfer energy until they are both 93℃.
d. The air will transfer thermal energy into the coffee and will continue to transfer energy until they are both 93℃.
a. The hot coffee will transfer thermal energy into the air, and the energy transfer will continue until the coffee is at room temperature.
9. A student drops a ball from three different heights, as shown. For each drop, she calculates what the kinetic energy of the ball would be when it hits the ground. The table shows her data.
The student says that a ball dropped from a height of 3.0 meters would have less than 96 joules of kinetic energy when it hits the ground. Is she correct and why?
Type Answer HERE:
a. She is correct because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.
b. She is correct because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.
c. She is incorrect because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.
d. She is incorrect because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.
c. She is incorrect because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.
The above graph is a phase change diagram for water. At points B and D the water is going through a phase change. During the phase changes, what is happening to the temperature and the heat energy?
Type Answer HERE:
During the phase changes at points B and D, the temperature remains constant while the heat energy is being used to change the state of the water.
11. Use the following image to answer the questions:
The above graph is a phase change diagram for water. At points B and D the water is going through a phase change. During the phase changes, what is happening to the temperature and the heat energy?
Type Answer HERE:
a. The temperature and the heat energy are increasing during a phase change.
b. The temperature remains constant and the heat energy is increasing during a phase change.
c. The temperature is increasing and the heat energy remains constant during a phase change.
d. The temperature and the heat energy remain constant during a phase change.