Scientist have been able to determine the composition of earth's layers by: a) studying photographs taken from satellites. b) drilling down and bringing up samples to study. c) shooting x-rays into the planet. d) making inferences based on data from seismic waves.

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages