What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules?
1 answer:
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<h2>Answer: 136.363 m</h2>
Explanation:
We can find the wavelength of the radiation produced by the microwave oven by using the following given equation:
(1)
Clearing :
(2)
Knowing
(3)
This is the wavelength of the radiation produced by the microwave
Answer:
the tension in the string an instant before it broke = 34 N
Explanation:
Given that :
mass of the ball m = 300 g = 0.300 kg
length of the string r = 70 cm = 0.7 m
At highest point, law of conservation of energy can be expressed as :
The tension in the string is:
Thus, the tension in the string an instant before it broke = 34 N
Answer:Racquet force is twice of Player force
Explanation:
Given
ball arrives at a speed of
ball returned with speed of
average Force imparted by racquet on the ball is given by
where
time of contact of ball with racquet
When it land on the player hand its final velocity becomes zero and time of contact is same as of racquet
From 1 and 2 we get
Hence the magnitude of Force by racquet is twice the Force by player