Question
Solar Pool Heater
Solar Pool Heater
A pool owner is building a solar heater to keep her pool a comfortable 85°F. So far, she has a design that consists of piece of wood with black drip irrigation tubing coiled around and secured. This part of the design is shown in the picture.
The pool owner is making a few choices in the design of the solar heater. She is deciding whether to leave the wood plain or paint it, either white or black. She wants to choose the option that will help the solar heater warm the pool quickest. To make her decision, she cuts three pieces of wood that are one foot by one foot. Then, she paints one of them white and one of them black. She leaves the third piece of wood its original color. She places the three pieces of wood into the sunlight for 30 minutes and records their temperatures every five minutes. The table shows this data.
Wood Color Temperatures (in °F)
0 minutes 5 minutes 10 minutes 15 minutes 20 minutes 30 minutes
Plain Wood 75 75 76 76 77 77
White Paint 75 75 75 75 76 76
Black Paint 75 76 78 80 81 82
The second decision the pool owner would like to make is whether she should use 100 feet of drip irrigation tubing or 200 feet of drip irrigation tubing. She would also like to connect the design to a small programming device that will turn the water pump for the pool on and off based on the pool's temperature. When the pump is on, water will be pumped out of the pool and through the black tubing. Then, the water will flow back into the pool as it exits the tubing. When the pump is off, no water will be pumped out of the pool and through the black tubing. The pool owner needs to decide how to program the device so that the temperature of the pool is as close to 85°F as possible.
Multiple Choice Question
How does the irrigation tubing help to solve the problem?
A.
The irrigation tubing absorbs the radiant energy from the Sun and transfers it to the water by conduction.
B.
The irrigation tubing circulates the water, which heats the water through the friction created by the movement.
C.
The irrigation tubing absorbs the heat from the Sun through conduction and transfers it to the water by convection.
D.
The irrigation tubing spreads the water out, allowing the water to be heated directly by the Sun through convection.
Solar Pool Heater
A pool owner is building a solar heater to keep her pool a comfortable 85°F. So far, she has a design that consists of piece of wood with black drip irrigation tubing coiled around and secured. This part of the design is shown in the picture.
The pool owner is making a few choices in the design of the solar heater. She is deciding whether to leave the wood plain or paint it, either white or black. She wants to choose the option that will help the solar heater warm the pool quickest. To make her decision, she cuts three pieces of wood that are one foot by one foot. Then, she paints one of them white and one of them black. She leaves the third piece of wood its original color. She places the three pieces of wood into the sunlight for 30 minutes and records their temperatures every five minutes. The table shows this data.
Wood Color Temperatures (in °F)
0 minutes 5 minutes 10 minutes 15 minutes 20 minutes 30 minutes
Plain Wood 75 75 76 76 77 77
White Paint 75 75 75 75 76 76
Black Paint 75 76 78 80 81 82
The second decision the pool owner would like to make is whether she should use 100 feet of drip irrigation tubing or 200 feet of drip irrigation tubing. She would also like to connect the design to a small programming device that will turn the water pump for the pool on and off based on the pool's temperature. When the pump is on, water will be pumped out of the pool and through the black tubing. Then, the water will flow back into the pool as it exits the tubing. When the pump is off, no water will be pumped out of the pool and through the black tubing. The pool owner needs to decide how to program the device so that the temperature of the pool is as close to 85°F as possible.
Multiple Choice Question
How does the irrigation tubing help to solve the problem?
A.
The irrigation tubing absorbs the radiant energy from the Sun and transfers it to the water by conduction.
B.
The irrigation tubing circulates the water, which heats the water through the friction created by the movement.
C.
The irrigation tubing absorbs the heat from the Sun through conduction and transfers it to the water by convection.
D.
The irrigation tubing spreads the water out, allowing the water to be heated directly by the Sun through convection.
Answers
GPT-4o mini
The correct answer is:
**A. The irrigation tubing absorbs the radiant energy from the Sun and transfers it to the water by conduction.**
Explanation: The black tubing, when exposed to sunlight, absorbs radiant energy (heat) from the Sun due to its color (black absorbs more heat than lighter colors). The heat from the tubing is then transferred to the water that circulates through it by conduction, warming the water before it returns to the pool.
**A. The irrigation tubing absorbs the radiant energy from the Sun and transfers it to the water by conduction.**
Explanation: The black tubing, when exposed to sunlight, absorbs radiant energy (heat) from the Sun due to its color (black absorbs more heat than lighter colors). The heat from the tubing is then transferred to the water that circulates through it by conduction, warming the water before it returns to the pool.