3. A South African sharp-nosed frog set a record for a triple jump by travel- ing a distance of 10.3 m. Suppose the frog starts from the origin of a coor-
dinate system and lands at a point whose coordinale on the y-axis is equal
lo -6.10 m. What angle does the vector of displacement make with the
negalive -axis? Calculate the x-sais coordinate of the fog.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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)

Why do atoms emit energy of only specific wavelengths