In which era did the universe's clouds start to condense and the universe became transparent for the first time?

A 2.74 g coin, which has zero potential energy at the surface, is dropped into a 12.2 m well. After the coin comes to a stop in the mud, what is its potential energy with respect to the surface? A. 0.544 J B. - 0.328 J C. 0.356 J D. - 0.165 J

A car travels at a velocity of 8m/s for 16s. How far did it travel?

How many neutrons does element X have if its atomic number is 59 and its mass number is 164?

What s a defining feature of a system?

A very long solid cylinder is made from a material in which the net charge density is constant. The electric field within the cylinder is proportional to: A) r 3 B) r 2 C) r D) constant E) 1/r

Why would a long series of gradual ramps be better than one short, steep ramp for moving heavy blocks of stone?

Why are some liquids more viscous than others?

If a person weighs 125 lbs, 8oz., how many mg does s/he weigh

An iron rod is: A:a good conductor of heat and electricity, but not magnetic B: magnetic and a good conductor of heat, but is an insulator of electricity C: magnetic and a good conductor of heat and electricity D: not magnetic and an insulator of

Which stage are there homologous chromosomes lines up down the middle of the cell