Answer:
Friction 100 j
Explanation:
Friction causes the inequality between PE and KE
100 J
Answer:
The power radiated by the hawk is 0.452 Watt.
Explanation:
Given that,
Frequency = 50 Hz
Distance r=60 m
Level = 70 dB
We need to calculate the intensity
Using formula of intensity
Put the value into the formula
We need to calculate the power radiated by the hawk
Using formula of power
Put the value into the formula
Hence, The power radiated by the hawk is 0.452 Watt.
Answer:
Speed. I am speed.
Explanation:
The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. A single lap should be completed each time you hear this sound. Remember to run in a straight line, and run as long as possible.
The power required is 1.6 kW.
Answer:
Explanation:
Power is defined as the amount of work done on any object for a given time interval. In other words, power is the amount of force required to move an object in a given period of time.
Power = Work done / time taken for that work done.
Here the force is given as 800 N and the displacement is given as 2.5 m, while the time required for the displacement is given as 1.22 seconds.
So the power will be ratio of the product of force acting on the weightlifter, displacement of the weight to the time taken for that displacement.
Power = (800×2.5)/1.22 =1639 W
So the power required is 1.6 kW.