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When temperature is expected to drop below freezing, a farmer places large tubs of w water in an unheated food storage shed. Write two or three sentences explaining why the farmer uses this technique to protect the produce from freezing.
Hint.
Remember that liquid water has more potential energy than ice
A 2.20 kg mass on a spring has displacement as a function of time given by the equation x(t)= (7.40 cm) cos [4.16 rad/s) t - 2.42 rad]. Find the time for one complete vibration
A 60-kg object on a frictionless horizontal surface oscillating on a spring that has a force constant equal to 1.5 kN/m has a total mechanical energy of 0.70 J. What is the amplitude of the motion
A baseball (m = 145 g) approaches a bat horizontally at a speed of 40.5 m/s (91 mi/h) and is hit straight back at a speed of 45.9 m/s, what is the average force exerted on the ball by the bat
What determines whether a gas obeys Bose or Fermi distributions?
A proton and an electron are held apart a distance of one meter, Calculate the electric force F between them and Show the electric force vector on each of them
Three identical resistors are linked in parallel. The equivalent resistance increases by 700 Ω when one resistor is connected and removed in series with the remaining two, which are still in parallel. Discover the resistance of each resistor.
A uniform thin rod of length 0.50 m and mass 4.0 kg can rotate in a horizontal plane about a vertical axis through its centre. what is the bullet's speed just before impact
a rock is tossed straight up with a speed of 20ms when it returns it falls into a hole 10m deep.what is the rocks
60 cm3 of gasoline are mixed with 64 cm3 of water. What is the average density of the mixture
The maximum strength of the earth's magnetic field is about 7.0 x 10-5 T near the south magnetic pole. What is the minimum number of turns (area per turn = 0.021 m2) that the coil must have to produce an rms voltage of 170 V
A tank whose bottom is a mirror is filled with water to a depth of 15.0 centimeter. Determine the apparent depth of the image of the fish
In nuclear power plant, the reactor produces steam at 518 celcius and the cooling tower eliminates waste heat into the atmosphere at 27 celcius. what is the rate of release of waste heat
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