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.

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?

Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero