- 6. Three identical small Styrofoam balls (m=1.86g) are suspended from a fixed point by three nonconducting threads, each with a length of 53.7cm and with negligible mass.At equilibrium the three balls form an equilateral triangle with sides of 31 .6cm. What is the common charge q carried by each ball? square square Incorrect. Tries 1/11 Previous Tries
- A revolutionary war cannon, with a mass of 2040 kg, fires a 16.2 kg ball horizontally. The cannonball has a speed of 112m/s after it has left the barrel.. The cannon carriage is on a flat platform and is free to roll horizoni tally. What is the speed of the cannon immedi- ately after it was fired? Answer in units of m/s Answer in units of m/s
- The temperature drops from 0^circ C to -10^circ C If one person's body loses 200W/m^2 of heat, how much total heat is lost in 2 hours? (Hint: Energy=Powertimes Time)
- 8. Car A has a mass of 1000 kg and a speed of 30m/s. Car B has a mass of 3000 kg and a speed 10m/s The momentum of car A has __ car B. (1 Point) less momentum than more momentum than the same momentum as 9. If a 1000-kg car has a speed of 30m/s its momentum is (1 Point) [4 450,000kg^ast m/s 30,000kg^ast m/s 33.3kg^ast m/s 30,000N/s
- Multiple Choice 1 point How did Herschel discover infrared light? He observed radioactive material that glowed and was , able to take a picture of the inside of his wife's hand He used a prism to divide light into all the visible colors of the rainbow He was measuring the temperatures of visible light and included a thermometer beyond the red light end of the spectrum. He noticed that the thermometer had a temperature and inferred that there was some kind of invisible light there. He observed light with special glasses that allowed him to see in the dark
