2.25 amperes
Ohms law dictates that electrical voltage = current times resistance. Since you are given voltage and not the current, you will be dividing voltage by the resistance.
9.0V ÷ 4.0ohms = 2.25 amps
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This is A, true, because no matter what you do, it will have a reaction that happens.
Answer: 20.73 m/s
Explanation:
The centripetal force is given by the following equation:
(1)
Where:
is the centripetal force
is the mass of the car
is the centripetal acceleration
Isolating :
(2)
(3)
(4)
Now, there is a relation between the centripetal acceleration and the tangential velocity:
(5)
Where is the tangential velocity and is the radius of the circular path, which can be found if we know its length :
(6)
(7)
(8)
(9)
Substituting (4) and (8) in (5)
(5)
Finding :
Explanation:
Sum the moments about the hinge H. Assume anticlockwise is positive and clockwise is negative.
∑τ = Iα
(20 N) (500 mm) − F (120 mm) = 0
F = 83 N
Pressure = force / area
P = 83 N / 0.0036 m²
P = 23,000 Pa
Answer:
a coil rotating in a magnetic field to change its flux