A complete circuit contains two parallel connected devices and a generator for providing the electromotive force. The resistance
of the first device is 1208 ohMs the resistance of the second device is 408 ohMs and the voltage developed by the generator is 40 V. What is the magnitude of the current flowing through the first device
We are asked to solve and determine the magnitude of the current flowing through the first device. In order for us to have a better understanding of the problem, we can refer to the attached picture which contains electric circuit diagram. Since it the problem we are already given with an electromotive source or the voltage supply and since the two resistance is in parallel, it would clearly mean that the voltage drop in each resistance is just the same. The resistance 1 uses the 40 volts at the same time the resistance 2 uses 40 volts also. Solving further for the current, we can apply Ohm's law which V = IR where "V" represents the voltage, the "I" represents the current and "R" represents the resistance.
Such as the solution in obtaining current is shown below: I = V / R, substitute values we have it I = 40 volts / 1208 ohms I = 0.0331 Amperes
Therefore, the current flowing in the first device is 0.033 Amperes or 33 milliAmperes.
To solve this problem we must use the principle of conservation of momentum which tells us that the initial momentum of a body plus the momentum added to that body will be equal to the final momentum of the body.
<span>Surface ocean currents are generally wind-driven. However, the rotation of the Earth affects the way the waters move through currents. Without rotation, currents may not exist.</span>
Violet light is electromagnetic radiation with wavelengths of 410 nanometers and red light has a wavelength of 680 nanometers. The nanometer is a unit of distance in the metric scale and is abbreviated as nm. One nanometer (nm) equals one thousand millionths of a meter (m) or 1 nm = 10-9 m.
In absence of friction, the change in kinetic energy of the combined mass of the monkey and the sled, must be equal (with opposite sign), to the change in gravitational potential energy:
ΔK = -ΔU
When friction is not negligible, the change in mechanical energy, must be equal to the work done by non-conservative forces (kinetic friction in this case):
ΔK + ΔU = Wnc (1)
As the monkey + sled reach to the maximum distance up the incline, they will come momentarily to a stop, so the final kinetic energy is 0.
The change in gravitational energy, can be written as follows:
The sum of these two quantities, must be equal to the work done by the friction force, along the distance d up the incline:
The normal force, always normal to the surface, must be equal and opposite to the component of the weight normal to the incline:
Replacing in the equation for Wnc:
We can return to the equation (1) and solve for d:
