Physics, 28.06.2019 02:10 kittenalexis68
To prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. when the water turns to ice during the night, heat is released into the plants, thereby giving them a measure of protection against the falling temperature. suppose a grower sprays 6.90 kg of water at 0°c onto a fruit tree. (a) how much heat is released by the water when it freezes? (b)how much would the temperature of a 122-kg tree rise if it absorbed the heat released in part (a)? assume that the specific heat capacity of the tree is 2.5 x 10^3 j/(kg c°) and that no phase change occurs within the tree itself.
Answers: 3
Physics, 21.06.2019 21:30
Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?
Answers: 2
Physics, 22.06.2019 06:30
=force × distance a. work b. velocity c. pressure d. momentum
Answers: 1
Physics, 22.06.2019 16:40
The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
Answers: 3
Physics, 23.06.2019 09:00
When the acceleration of a mass on a spring is zero, the velocity is at a (fill in the blank) . when the velocity of a mass on a spring is zero, the acceleration is at a (fill in the blank) .
Answers: 1
To prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when...
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