Answer:
the change in momentum is 2.52 N·s
the constant force on the ball while in contact with the players foot is 126 N
Explanation:
p=momentum
m=mass
v=change in velocity
p=(0.42)(6)
p=2.52
The answer is refraction. When a wave from one medium enters another medium, its direction changes due to the change of speed (phase velocity changes but frequency remains the same). The wave slows down when it enters a denser medium from the one it came from hence its path seems to bend.
(a)
Use “saturated refrigerant-134a pressure tableâ€, to find $ , h , and of refrigerant-134a, at 320kPa (P) .
= 251.93kJ/kg
) =0.93026 kJ/kg-K
=0.063681 m/kg
we solve ,
= 282.62 kj/kg
= 127.25 kJ/kg
We use this formula for finding
= 38.8 kw
(b)
Find the COP of the heat pump () .
() =
= (282.62 -127.25) / (282.62-251.93)
= 5.06
What is evaporator pressures ?
Valves for regulating evaporator pressure
Although the compressor suction pressure may be lower, evaporator pressure regulation (EPR) valves can be employed in the suction line to prevent the evaporator pressure from dropping below a set or controlled value.
An EPR valve is used for the following tasks:
1. Prevent potential damage to a liquid chilling evaporator from the liquid freezing.
2. Prevent frost from accumulating on an air-cooling evaporator when it is near freezing point or when operation cannot be interrupted by a brief failure.
3. Permit the operation of two or more evaporators with the same compressor at various load temperatures.
4. Vary the evaporator pressure in accordance with a fluctuating load that is managed by the load temperature.
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Salt is a compound, with the chemical name "Sodium chloride"
and the chemical formula NaCl.
Each molecule of salt is an atom of sodium electrically bound to
an atom of chlorine.
The chemical properties of salt are completely different from the
chemical properties of either element in its molecule. In fact,
sodium and chlorine are both toxic and corrosive, i.e., poison,
but as long as the salt is still salt, you can safely eat it !
There's nothing physical or mechanical, like spinning or filtering,
that you can do to salt to separate the sodium from the chlorine.
That takes electrical or chemical processes, and once you separate
them, you wind up with two substances that are both dangerous.
If you put salt into a jar with some sand and shake it up, then you
have a mixture. The salt is still salt and the sand is still sand, and
they can be separated quite easily.
If you put some salt in some water, and stir it up so that the salt
dissolves, then you have a salt solution. Some of the salt
molecules actually come apart in it, and there are sodium ions
and chlorine ions in the water. When that happens, the water
begins to conduct electric current very nicely, and if you DO
pass current through it, you get sodium collecting at the end
of one wire, and chlorine collecting at the other wire. But if you
just let it set there in the sun, or heat the solution on the stove,
then once the water evaporates, you have plain old salt again
in the jar.
From the wording of the question, I'm suspecting that you have ...
... either a piece of equipment or else a computer program named "myDAQ",
... an inductor to play with and measure, either in your hand or on the screen.
I have none of these advantages.
In fact, nobody reading this on Brainly has.
It's like if I asked you to write an equation that can be solved to find the total amount of money in all five of my pockets right now.