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 13:30
This is how zirconium appears in the periodic table. rounded to the nearest whole number, how many electrons are in an atom of zirconium?
Answers: 2
Physics, 22.06.2019 07:20
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Physics, 22.06.2019 16:40
Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward
Answers: 1
Physics, 23.06.2019 00:30
1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted
Answers: 3
To prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when...
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