How can two compounds with the same chemical composition have different densities?

Over a short interval the coordinate of a car in the meters isgiven by x (t) = 27t - 4.0 t3 where time t is in seconds, at the end of 1.0s the acceleration of the car is 1. 27 m/s2 2. 4.0 m/s2 3. - 4.0 m/s2 4. - 12 m/s2 5. - 24 m/s2

Water can absorb and store a large amount of heat while increasing only a few degrees in temperature. why?

Justin and his friends are on the football team. they consider skateboarders at their school to be an out-group. what does this mean?

For each of the following cases, indicate whether the net work done is positive, negative, or zero. (a) gravity acting on a falling ball (b) girl accelerating a wagon from rest (c) a skydiver falling at terminal velocity through the air (d) friction

A load of mass 5kg is raised through a height of 2m. (g=10mls)

Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.

a man is standing on the edge of a 20.0m high cliff. he throws a rock vertically with an initial velocity of 10.0m/s. how high does the rock go?

The slope of a velocity time graph over any interval of time gives the during that interval

if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?