Short essay.
- Technology is changing many aspects of our society. Give two examples of technologies that threaten some aspect of society, explaining the threat and what solutions are proposed or implemented.
- Ultimately what seems to be the prevailing solutions to any technological problem? (In general terms, not specific to any one problem).
- Why is the “Amish approach” to the ills of technology not generally feasible or even desirable?
Problem: Work the problem clearly and logically from the information given to the answer.
- Calculate and compare the KE of 60g tennis ball at 150 mph with the KE of a 200 g softball thrown at 60 mph (miles per hour).
- If 1 kWh of electricity costs 20 cents, how much would the energy of the softball cost?
- if a round lightbulb (of any type produces 5 W of visible light, what will be the intensity 3 m away from it?
- A large powerplant produces about 1 GW of electricity. What is area of land (in square kilometers) receives 1GW of sunlight? (what is the intensity of sunlight)
- If the efficiency of solar cells is 20%, what are of land do you need to cover with solar cells to produce 1 GW of power?
