Describe how the horizontal distance of a projectile is affected as the projectile’s angle of launch is increased from 25 degrees to 30 degrees.

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)