A rock falls off a cliff and hits the ground after three seconds. The rock's velocity is 29. 4 m/s when it hits the ground. What is its acceleration of the rock in the downward direction? 0. 31 ms2 3 ms2 9. 8 ms2 88. 2 ms2.

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

What will a positive and a negative charge do if they are separated from each other?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.