A stationary Hot Wheels toy car on top of a ramp has a total of 0.15 J of gravitational potential energy and 0 J of kinetic energy. Assuming there is no loss of heat energy due
to friction, how much kinetic energy will the car have when it reaches the bottom of the
ramp?
o cannot calculate kinetic energy without the mass and velocity of the car
O 0.10 )
0.15)
OJ

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?