Orion made using a telescope are...

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.

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Which accurately compares concave and convex lenses?