A value that describes how heavy an object is and is related to the force of gravity is
2 answers:
The heaviness of an object with the relation to force of gravity, is described by the ‘weight’
<u>Explanation: </u>
The heaviness of the object is referred to the mass of the object. When the mass of the object is concerned it is taken in space or vacuum where force of gravity do not exist.
Therefore, to value the actual heaviness of the object, mass is multiplied by the component of force of gravity, is termed as weight.
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Answer:
The induced emf between two end is V
Explanation:
Given:
Length of rod m
Height m
Magnetic field T
For finding induced emf,
Where velocity of rod,
For finding the velocity of rod.
From kinematics equation,
Where initial velocity,
Put the velocity in above equation,
V
Therefore, the induced emf between two end is V
Answer:
Emec = 94050 [J]
Explanation:
In order to solve this problem, we must understand that all thermal energy is converted into mechanical energy.
The thermal energy can be calculated by means of the following expression.
where:
Q = heat [J]
Cp = specific heat of water = 4186 [J/kg*°C]
m = mass = 300 [g] = 0.3 [kg]
T_final = 95 [°C]
T_initial = 20 [°C]
Now we can calculate the heat, replacing the given values:
Since all this energy must come from the mechanical energy delivered by the exercise bike, and no energy is lost during the process, the mechanical energy must be equal to the thermal energy.