While playing her guitar , karen plucks one string with increasin levels of force. what effect does this have on the sound produced?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block