1. An electric heater used to boil small amounts of water consistsof a 15-Ω coil that is immersed directly in the water. Itoperates from a 120-V socket. How much times is required for this heater to raise the temperA 100g granite cube slides down a frictionless 38 degreeincline. At the bottom, just after it exits onto a horizontaltable, the granite collides with a 250g steel cube at rest. How high above the table should the granite cube be released to givethe steel cube a speed of 170cm/s? (Answer in cm)
2. A 11.0kg box slides 4.0m down a frictionless 30 degree incline, then collides with a spring whose spring constant is 180N/m.
a) What is the maximum compression of the spring inmeters?
b) At what compression of the spring in centimeters does the box have its maximum speed?ature of 0.5 kg of water from 13degrees Celcius to the normal boiling point?