Answer:
13830.74 W
Explanation:
Applying
P = W/t.................... Equation 1
Where P = Power produce in the engine, W = Work done by the engine, t = time.
But,
W = F×d................... Equation 2
Where F = force, d = distance.
Substitute equation 2 into equation 1
P = (F×d)/t...................... Equation 3
From the question,
Given: F = 2230 N, d = 58.3 m, t = 9.4 s
Substitute these values into equation 3
P = (2230×58.3)/9.4
P = 130009/9.4
P = 13830.74 W
The resistance of the circuit is 
Explanation:
We can solve the problem by applying Ohm's law, which gives us the relationship between current, potential difference and resistance in a circuit:
where
V is the potential difference
R is the resistance
I is the current
For the circuit in this problem,
V = 12.6 V
I = 25.4 A
Re-arranging the equation, we can solve for the resistance:
Learn more about current and potential difference here:
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Some of these frictions depend on the Pressure, temperature of atmosphere.
Static Friction: This is the friction force when two objects in contact are not moving relative to each other. This friction is higher than kinetic friction.
Kinetic or Dynamic friction: this the friction force opposing the motion of objects, when two objects in contact are in motion relative to each other. It is less than the static friction. The two surfaces are rubbing against each other as they move.
Rolling friction: This is the friction when two objects are in contact and one object is rolling over the other - like a wheel on a road. The point of contact appears as stationary. The rolling friction is very less compared to static friction & dynamic friction.
Lubricated friction: this is the friction between two solid surfaces in contact with a layer of lubricant fluid flowing in between them. This friction is the least.
Fluid friction - viscosity : this is friction between two adjacent layers that are moving relative to each other at different speeds in a fluid. This is not high.
Internal friction: when an object is compressed and forced to deform, like in a piece of rubber, there is friction between the layers, that opposes this deformation.
Skin friction is the friction that opposes movement of a fluid across a solid surface. This is also called drag. When a coin is dropped in water, there is a friction called drag on the coin. Same is the case when a ball is thrown, a drag is experienced by the ball due to the drag of air.
In option A there are two resistors in which two terminals of resistors are connected with the terminals of battery so here they are connected in parallel.
In option B all resistors and battery is connected in a single loop so it is a series combination of all.
In option C all three resistors are connected by their terminals to a single battery so here all three resistor are in parallel with the battery.
In option D only one resistor is connected in series with a battery as one single loop is there.
So in the above all cases two resistors are in parallel with battery in option A
