A fourth seismic station is located 5000 kilo- meters from this epicenter. How long after
the P-waves did the S-waves arrive at the
fourth station?

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

Why should the wavelength scale of spectroscope be calibrated