Rapid variability in quasars indicates that the region in which the energy is generated must be small. you can show why this is true. suppose, for example, that the region in which the energy is generated is a transparent sphere 1 light-year in diameter. suppose that in 1 s this region brightens by a factor of 10 and remains bright for two years, after which it returns to its original luminosity. draw its light curve (a graph of its brightness over time) as viewed from earth.

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

How do you tell if someone actually cares about you? and just say they do?