A cross-country skier can complete a 7. 5 km race in 45 min. What is the skier’s average speed? km/h.

Aray diagram for a refracted light day is shown. what does the dashed line represent

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s. calculate eddy’s power rating