To calculate wind chill, enter the current ambient temperature in degrees Fahrenheit (°F) and enter the speed of the wind in miles per hour
To solve this problem it is necessary to apply the concepts related to energy conservation. Therefore, the work done will initially be equivalent to the change in kinematic energy. And this kinematic energy will be equivalent to the sum of energy (work) carried out by force and friction. In this way we have to
Now,
For each one we have
Then at the equation of equilibrium of energy we have,
Therefore the work done by friction on the chair is -833.7J
Answer:
Explanation:
From the equation we are told that:
Velocity of French sub
Velocity of U.S. sub at
French Wave Frequency
Velocity of wave
Generally the equation for Signal's frequency as detected by the U.S. is mathematically given by
Doppler effect
Answer:
Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy. While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation.
Explanation:
Answer:
7350 J
Explanation:
The gravitational potential energy of the rock sitting on the edge of the cliff is given by:
where
m is the mass of the rock
g is the gravitational acceleration
h is the height of the cliff
In this problem, we have
m = 50 kg
g = 9.8 m/s^2
h = 15 m
Substituting numbers into the formula, we find: