Power: A typical incandescent light bulb consumes 75 W of power and has a mass of 30 g. You want to save electrical energy by dropping the bulb from a height great enough so that the kinetic energy of the bulb when it reaches the floor will be the same as the energy it took to keep the bulb on for 1.0 hour. From what height should you drop the bulb, assuming no air resistance and constant g?
Fill in the blank(s) with the appropriate word(s).
920 km
You might also like to view...
The best explanation for the activity at the center of the galaxy is a(n) ____
a. supercluster of O and B stars b. black hole with a mass several thousand times the Sun's c. giant atomic hydrogen cloud energized into a single, massive emission nebula d. black hole with a mass several million times the Sun's e. exotic object known as a "magnetar"
A mule is an example of an exception to which of the fundamental characteristics of life?
A) response to environment?mules cannot respond to changing environmental conditions and that is why they are stubborn B) evolutionary adaptation?because mules are sterile they cannot evolve and adapt C) growth and development-mules being sterile do not grow and develop like other life forms D) reproduction?a mule is sterile and cannot reproduce even though it is the product of reproduction between two closely related animals (a horse and a donkey)
List the three types of objects a star's core can collapse to, and give the mass limits for each
What will be an ideal response?
Including relativistic effects, doubling the speed of a object:
a. doubles its momentum. b. more than doubles its momentum. c. less than doubles its momentum. d. has no effect on its momentum.