ACTIVITY 2. Solve the problems below. 1. In an experiment, five trials were done to determine the range of a projectile. The measurements are as
follows: 206.5cm, 208.1cm, 210.9cm, 203.2cm and 205.7cm. Find a) mean b) standard deviation c) variance
d) measurement of the range of the projectile.
2. During an experiment, the students were asked to measure the period of a pendulum. The measurements
are as follows: 2.16s, 2.33s, 2.40s, 2.515, 2.28s and 2.02s. Determine the a) mean b) standard deviation c)
variance d) measurement of the period of pendulum.

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)

En un laboratorio, nakisha mezcla una solución de hidróxido de sodio con un indicador llamado fenolftaleína. cuando se combinan, crean una solución de color rosa. nakisha se pregunta si la mezcla de otras soluciones con fenolftaleína también creará este color rosa. ? cómo podría nakisha utilizar el proceso de investigación científica para determinar si la mezcla de otras soluciones con fenolftaleína también creará un color rosa? marque las que correspondan.

If a 250-g mass is hung on two identical springs, hung side by side , and both support the 250-g mass, how much will each spring stretch?