PLEASE HELP ;w; What is the difference in energy expended to do work between a crane lifting a 100-N block 6 m above the ground versus a crane lifting a 100-N block 11 m above the ground?

0 J

5 J

100 J

500 J

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

What are two different ways you could find the value of a? explain these methods.

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