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To help prevent frost damage, fruit growers sometimes protecttheir crop by spraying it with water when overnight temperaturesare expected to go below the freezing mark. When the water turns toice during the night, heat is released into the plants, therebygiving them a measure of protection against the fallingtemperature. Suppose a grower sprays 8.88 kg of water at 0°Conto a fruit tree.
(a) How much heat is released by the water when it freezes?
(b) How much wouldthe temperature of a 148-kg tree rise if it absorbed the heatreleased in part (a)? Assume that the specific heat capacity of thetree is 2.5 x 103 J/(kg C°) and that no phase changeoccurs within the tree itself.
A home run is hit in such a way that the baseball just clearsa wall 21 m high, located 130 m from home plate. The ball is hit atan angle of 35° to the horizontal, and air resistance is negligible.
question1a 8kg mass moves in a circular path of 4m radius on a frictionless horizontal table. it is attached to a
q1. what effect will increase in temperature from 25 degree celsius to 32 degree celsius of the metal metre stick have
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. How many times does the diaphragm move back and forth
What is the phase difference in a Young's double slit experiment where the intensity is half that of the central maximum
A battery with \Epslion 12.0 V delivers a termal voltage of 11.2 V to a 45.0 V to a 45.0 \Omega load resistor. Calculate The value of the battery's internal resisance
Albert pushes a 6-kg box across a level floor. He pushes with a force of 43 newtons, and observes that the box accelerates in the direction of his push, What must be the net force acting on the box
In an experiment to measure the index of refraction of human skin, it was found that if a beam of unpolarized light was hone on a skin sample from air at an incident angle of 54.7. what is the index of the refraction of this skin sample
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
you stand on a frictionless platform tha tis rotating with anangular speed of 1.5 rev/s. your arms are outstretched, what is the resulting angular speed of the platform
A 16-kg rotating disk of radius 0.26m has an angular momentum of 0.30KGg * m^2/s, What is the angular speed of the disk
A steel cable with a total length of 22.6 m and total mass of 68 kg is connected to two poles. Calculate the wavelength of the resulting wave on the cable
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