For the different wires the values given are
For Wire A, Area=
, Resistivity=
, Length= 
, Heat=
, Voltage= V, Time= t, Wire B, Area=
, Resistivity=
, Length= 
, Heat=
So, / =
/
Therefore / = 
<h3>Heat</h3>
The type of energy that moves between two materials with varying temperatures is referred to by scientists as heat. Because the average translational kinetic energy per molecule in the two materials varies, an energy transfer takes place. Up until thermal equilibrium is attained, heat is transferred from the substance with the higher temperature to the material with the lower temperature. The joule, with 1 joule equalling 1 newton meter, is the SI unit of heat. Imagine the following situation to better comprehend what happens when this energy transfer takes place: Tiny rubber balls are bouncing all over two distinct containers that are full with them. The difference between the average ball speed in one container and the second container is substantial.
(a) Circular metal wires in electrical circuits may have different cross-sectional areas (different diameters) and different lengths. For a given applied voltage, how would the joule heat vary with these parameters
Learn more about heat here:
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Answer:
a
The speed of the quarterback backward is 
b
Known are
Unknown
Explanation:
From the question we are told that
The mass of the quarterback is 
The mass of the ball is 
The speed of the ball is 
The law of momentum conservation can be mathematically represented as
Now at initial both ball and quarterback are at rest and the negative sign signify that the quarterback moved backwards after throwing the ball
So
=> 
substituting values
The energy needed the raise the temperature of the block of silver is given by:
where m is the mass of the block, Cs the specific heat capacity of silver and
its increase in temperature.
Using the numbers of the problem, we find
Answer:
53.33 seconds
Explanation:
From the question;
- Power of the motor is 75 kW or 75000 W
- Depth or height is 150 m
- Volume of water is 400 m³
We are required to determine taken to raise the water from the given height.
We know that density of water is 1000 kg/m³
Therefore;
Mass of water = 400 m³ × 1000 kg/m³
= 4.0 × 10^5 kg
Thus, force required to raise the water;
= 4.0 × 10^5 kg × 10 N/kg
= 4.0 × 10^6 N
To determine the time;
we use the formula;
Time = work done ÷ power
= (4.0 × 10^6 N × 150 m) ÷ 75000 Joules/s
= 53.33 seconds
Therefore, time taken to raise the water is 53.33 seconds
Answer:
why should we do , do by your own , no sense
Explanation:
