If Luis pulls straight down on the end of a wrench that is tilted θ = 30∘ above the horizontal and is r = 29 cm long, what force must he apply to exert a torque of -17 N⋅m ?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.