Electromagnetic waves travel through space at a speed of a. 3,000,000 kilometers per second b. 3,000 kilometers per second c. 300,000 kilometers per second d. 30,000 kilometers per second

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

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false