Explanation:
<h2>[16]</h2>
Here,
We have to find the equivalent resistance of the circuit.
Here, 
and 
are connected in series, so their combined resistance will be given by,
Now, the combined resistance of and is connected in parallel combination with 
, so their combined resistance will be given by,
Reciprocating both sides,
Now, the combined resistance of , and is connected in series combination with 
. So, equivalent resistance will be given by,
Henceforth, Option A is correct.
<h2>_________________________________</h2>
<h2>[17]</h2>
Here, we have to find the amount of flow of current in the circuit. By using ohm's law,
V = IR
3 = I × 3.33
3 ÷ 3.33 = I
0.90 Ampere = I
Henceforth, Option B is correct.
<h2>____________________________</h2>
<h2>
Answer:</h2>
1.99 x 10⁶C
<h2>
Explanation:</h2>
The electrical energy (
) stored in the battery will give the car some kinetic energy (
) which will cause the car to move from rest to some other point.
i.e
= ------------------(i)
<em>But;</em>
= 
x Q x V; -------------------(ii)
Where;
Q = charge on the battery
V = potential difference or voltage of the battery = 12.0V
<em>Also</em>
= ( x m x v²) - ( x m x u²) -----------------(iii)
Where;
m = mass of the car = 956kg
v = final velocity of the car = 158m/s
u = initial velocity of the car = 0 [since the car starts from rest]
<em>Substitute equations (ii) and (iii) into equation (i) as follows;</em>
x Q x V = ( x m x v²) - ( x m x u²) -----------------(iv)
<em>Substitute all necessary values into equation (iv) as follows;</em>
x Q x 12.0 = ( x 956 x 158²) - ( x 956 x 0²)
x Q x 12.0 = ( x 956 x 158²) - (0)
x Q x 12.0 = ( x 956 x 158²)
x Q x 12.0 = 11932792
6Q = 11932792
<em>Solve for Q;</em>
Q = 11932792 / 6
Q = 1988798.67 C
Q = 1.99 x 10⁶C
Therefore, the amount of charge the batteries must have is 1.99 x 10⁶C
Explanation:
kinetic energy is energy that it possesses due to its motion.
Answer:
False
Explanation:
The tension in the chain must be equal to the frictional force acting on the car, not to its weight.
In fact, we have 4 forces acting on the car
- Its weight: downward
- The normal reaction of the road on the car: upward --> this force balances the weight, so the net force along the vertical direction is zero
- The tension in the chain: forward
- The frictional force between the road's surface and the tires of the car: backward
We can consider the horizontal motion only: we are said that the car is moving at constant velocity, so the horizontal acceleration is zero. According to Newton's second law:
zero acceleration means that the resultant of the forces on the car is zero. But there are only 2 forces acting on the car in the horizontal direction: the tension in the chain (forward) and the frictional force (backward). Since their resultant must be zero, it means that the two forces must be equal and opposite: therefore, the tension in the chain must be equal to the frictional force.
Stack temperatures typically range from 350 to 450 degrees Fahrenheit. A 2.5% efficiency loss occurs for every 100 degrees over that temperature. The majority of buildings schedule annual boiler cleanings at regular intervals, but if you see those figures rise, it's time for a cleaning.
Excess air is required to completely burn the fuel since the air and fuel cannot combine exactly in a burner. Additionally, any leaks in the heater will draw air into the firebox that doesn't pass through the burners since the furnace or boiler firebox operates at a little negative gauge pressure. Fuels that are gaseous, like natural gas, burn more readily than fuels that are liquid or solid. Depending on the fuel type, different surplus air requirements will apply.
Learn more about temperature here-
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