A student did an investigation to find ways to decrease the force needed to pull a weight up an inclined plane as shown below. What were the two methods she discovered to reduce the force?

Select the atomic models that belong to the same element

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

11) burning your hand when accidentally touching a hot plate is an example of which heat transfer? a. conduction b. convection c. radiation d. none of these