An object moving north with an initial velocity of 14 m/s accelerates 5 m/s2 for 20 seconds. what is the final velocity of the object?
a. 39 m/s
b. 90 m/s
c. 114 m/s
d. 414 m/s

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?