Answer:
The claim is false and violate the zeroth law of thermodynamics.
Explanation:
Zeroth law of thermodynamics refers to thermal equilibrium among elements. It states that elements which different temperatures will reach the same temperature at the endgame if they are close enough to interact each other. This temperaure is called <em>equilibrium temperature and it is always a intermediate value between the element with highest temperature and the element with the lowest one. So there is no way </em> a cup of cold coffee on a table can warm up to 80°C picking up energy from the surrounding air at 25°C because the cup can only reach a temperature closer to the surrounding air temperature which will be the equilimbrium temperature for that case.
Answer:
Velocity of ball B after impact is and ball A is
Explanation:
= Initial velocity of ball A
= Initial velocity of ball B = 0
= Final velocity of ball A
= Final velocity of ball B
= Coefficient of restitution = 0.8
From the conservation of momentum along the normal we have
Coefficient of restitution is given by
Adding the above two equations we get
From the conservation of momentum along the plane of contact we have
Velocity of ball B after impact is and ball A is .
Generator Hz comes in because competing frequencies in a machine might cause instability and equipment damage. Thus, option B is correct.
<h3>
What is the role of hertz in the alternator?</h3>
This alternator will produce 30 cycles of voltage in a second if it has two poles. The frequency would thus be defined as 30 cycles per second, or 30 Hertz. The alternator's rotating speed and frequency are directly inversely related.
When compared to a two-pole alternator, a four-pole alternator produces two cycles of voltage in a second (or one hertz of frequency). The number of poles in an alternator has a direct relationship to its frequency.
RPM is a common unit of measurement for engine power (rpm). The ability of an engine to deliver power is indicated by frequency, which is a significant number.
Therefore, Tech B says that hertz is the amount of current flow produced by an alternator.
Learn more about hertz here:
brainly.com/question/16538159
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Answer:
Weight of block is 191.424 Kg
Explanation:
The volume of rectangular block = cubic meter
1/5th of its volume being out of water which means water of volume nearly 4/5 th of the volume of rectangular block is replaced
Volume of replaced water = cubic meter
Weight of replaced water = weight of rectangular block = Kg/M3
= 191.424 Kg
Answer:
Explanation:
= Outside temperature =
= Temperature of room =
= Heat loss = 135000 kJ/h =
Coefficient of performance of heat pump
Input power
The minimum power required to drive this heat pump is .