A car traveled 84 km in 1 hour, 92 km in the next hour and then 122 km in the next 2 hours before arriving at its destination. What was the car’s average speed? a. 298 km/h
b. 63.5 km/h
c. 208 km/h
d. 74.5 km/h

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?