The si units for acceleration are km/h
fill in the blank to complete each statement.
7. the rate at which the velocity of an object changes is the object's rate of
8. an airplane is accelerating at 8 m/s2. each second its speed increases by
m/s
9. an airplane is accelerating at 8 m/s. the distance the airplane travels each second is!
than the distance it traveled during the previous second
10. an amusement park ride falls straight down for 4 seconds. during this time, the ride
accelerates from a speed of 0 m/s to 40 m/s. the ride's rate of acceleration during the
4 seconds is
m/s?

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.