A 4500-kg spaceship is in a circular orbit 160 km above the surface of Earth. It needs to be moved into a higher circular orbit of 360 km to link up with the space station at that altitude. In this problem you can take the mass of the Earth to be 5.97 × 1024 kg.

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

Blank liquids and gases exert a buoyant force on objects placed in them

The material that keeps its new shape after it is stretched is called?