An engine has an ideal efficiency of 37%, and the cold reservoir is 15°C. What is the temperature of the hot reservoir? Convert the efficiency to a decimal before solving. Round the answer to the nearest
tenth.
457.1 K
O 301.47K
275.09K
498.78K

An astronomer at the equator measures the doppler shift of sunlight at sunset. from this, she calculates that earth’s tangential velocity at the equator is 465 m/s. the centripetal acceleration at the equator is 3.41  10 2 m/s 2 . use this data to calculate earth’s radius.

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?