5) 5) A 45.0 kg person steps on a scale in an elevator. The scale reads 460 N. What is the magnitude of
the acceleration of the elevator?
A) 46.9 m/s2
B) 0.206 m/s2
C) 0.422 m/s2
D) 4.91 m/s2
E) 9.81 m/s2

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.