4- What is the useful power output in watts and horsepower of a person who does...
36) (a) What is the average useful power output of a person who does 6.00 x 10^6 J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
1. A lawnmower does 6.9 MJ of work in an hour A. What's its power output, in watts? B. What's its power output, in horsepower? Your mass is 65 kg, and you're in an airplane where your gravitational potential energy is7.0 MJ, where the zero of potential is taken at sea level. What's the plane's altitude?
What is the power output in unit of Watts for a 69-kg woman who runs up a 49 m high flight of stairs in 10.6 s, starting from vi=1.6 m/s but having a final speed of vf=7.1 m/? Use g=10 m/s.
Calculate the energy cost of cycling at a power output of 200 Watts for a 21 year old female who weighs 65kg [4 marks] 2. Calculate relative VO2max for someone who as an absolute VO2max of 3.3 l/min and weighs 72kg? [3 marks]
Do 120 Joules of work in 2 minute, and your power output is a. 120 Watts. b. 2 Watts. c. 240 Watts. d. 1 Watt.
In one day, the average food intake for a person in the United States is about 2500 kilocalories (1 cal = 4.2 J). Assuming half of this energy goes into work (the other half goes into heat radiated by the body), what is the average power output (in watts) of a person for 24 hours?
if the power in the primary circuit of 4:1 transformer is 12 watts, what will be the power in the secondary of this transformer? a. 3 watts b. 4 watts c. 12 watts d. 48 watts
A point source emits sound waves with a power output of 100 watts. What is the sound level (in dB) at a distance of 10 m? 16-5
If a point source of sound has an output power of of 100 Watts and it emits the sound equally in all directions what is the intensity (powers per unit area) at distances 5,10,15, and 20 meters from the source. Does that follow inverse square law? Please provide detail of how to solve. Thank you!
sustainable energy Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2 a. What must the irradiance be to achieve a power output of 17 watts? b. Would you expect the open circuit voltage to increase or decrease? c. Would you expect the short circuit current to increase or decrease? Problem 2: If a PV array has a maximum power output of 10 watts under irradiance level of 600 W/m2...