In empty space, an object of mass 1 kg is moving along a straight line with a constant speed of 10 m/s. Hanging in space is a dust-mote of negligible mass. At a certain instant the object is 100 m from the dust-mote. However, as it continues along its path, it will pass within 1 m of the mote. What is the magnitude of the angular momentum of the object, as seen from the dustmote’s position?

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.