About how far apart must you hold your hands for them to be separated by 2.8 nano-light-second (the distance light travels in 2.8 ns)? Assume that the speed of light is 2.998*10^8 m/s.

What is a carrier wave and how does it affect what you hear on the radio

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Which system of units is used by only a small number of countries in the world, including the u. s.