1. Light bulbs produce useful energy in the form of light and waste energy in the form of heat. What kind of light bulb would you use to incubate eggs?
A) high-efficiency light bulbs because they produce more heat
B) High efficiency light bulbs because they produce more light
C) low efficiency light bulbs because they produce more heat
D) low efficiency light bulbs because they produce more light
Simple Machines and Efficiency Quick Check
1.Light bulbs produce useful energy in the form of light and waste energy in the form of heat. What kind of light bulb would you use to incubate eggs?
a. low-efficiency light bulbs, because they produce more heat
2.A machine has an efficiency of 15%. If the energy input is 300 joules, how much useful energy is generated?
a. 45 joules
3.A process generates 250 watts of useful energy and 600 watts of waste energy. What is the efficiency of the process?
a.29%
4.A wheel and axle on a bicycle are designed with an axle radius of 0.125 meters and a wheel radius of 0.5 meters. If a force of 800 newtons is applied to the axle, what is the maximum output force of the bike wheel?
a. 3,200 N
5.A crowbar is being used with an actual mechanical advantage of 8. If the input force is 400 newtons on the 0.3-meter-long end of the crowbar, what is the output force on the short end?
a.3,200 N
C is correct
E) None, because a hen would probably do a better job.
The correct answer is C) low efficiency light bulbs because they produce more heat. Low efficiency light bulbs, such as incandescent bulbs, generate a significant amount of heat as waste energy. This heat can be utilized for incubating eggs, as it provides a source of warmth necessary for the incubation process.
To answer this question, we need to consider the fact that light bulbs produce both light and heat. In order to incubate eggs, we want to provide a controlled amount of heat without excessive light that could potentially harm the eggs.
Therefore, the best choice would be C) low efficiency light bulbs because they produce more heat and less light. By using low efficiency light bulbs, we can ensure that the eggs receive the necessary heat for incubation while minimizing the amount of potentially harmful light.