Answer:
The direction of the displacement is in North-West.
Explanation:
Resultant displacement D is
Here the direction is
Then the direction is North-west.
Substance Specific Heat (1 kg"K"
2 answers:
Aluminium has the highest amount of specific heat, so the engineer should consider Aluminium to absorb the most heat generated by the motor.
Explanation:
The capacity of heat absorbed by any metal can be calculated using the formulation of product of its specific heat with the mass and change in temperature.
So as the absorption capacity of any metal is directly proportional to the specific heat of the metal. The more the specific heat of the metal, the more amount of heat it can absorb. As specific heat is the amount of heat energy required to raise the temperature of an object by 1°C. So the greater the specific heat, the greater amount of heat energy will be absorbed by that metal.
Among the given options, aluminium has the highest amount of specific heat, so the engineer should consider Aluminium to absorb the most heat generated by the motor.
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The work done by Joe is 0 J.
<u>Explanation</u>:
When a force is applied to an object, there will be a movement because of the applied force to a certain distance. This transfer of energy when a force is applied to an object that tends to move the object is known as work done.
The energy is transferred from one state to another and the stored energy is equal to the work done.
W = F . D
where F represents the force in newton,
D represents the distance or displacement of an object.
Force = 0 N, D = 20 cm = 0.20 m
W = 0 0.20 = 0 J.
Hence the work done by Joe is 0 J.