What are the characteristics of an index fossil?

a. limited to a short span of geologic time but widely distributed

b. geographically limited

c. found only in shale

d. preserved as a mold

e. large enough to see without a hand lens

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit