One positive effect of recycling aluminum cans
to manufacture new beverage containers is
(1) conserving earth’s resources
(2) creating acid rain
(3) warming earth’s atmosphere
(4) increasing the ozone layer

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_