Answer:
8 V
Explanation:
There is no resistance between the left legs of voltmeters 2 and 3 and there is no resistance between the right legs of voltmeters 2 and 3. They are measuring the same voltage.
Answer:
A
Explanation:
occurs when a magnetic feild and an elctric conductor move relative to one another
Answer:
A= Q/4 B=0 C=Q/4
Explanation:
The initial condition, is as follows:
A=Q B=0 C=0
When A is brought to contact with B, as both spheres are conductors, charge distribute evenly between the two spheres, so after this, the charges on the spheres are as follows:
A= Q/2 B=Q/2 C=0
If B touches C, while C is grounded, this supplies a infinite source of sink of charge, so both spheres lose any charge.
At this stage, the charge distribution is as follows:
A = Q/2 B=0 C=0
Assuming C is not grounded, when finally touches A, the charge on A distributes evenly between A and C, so the final situation is as follows:
A = Q/4 B=0 C=Q/4
Answer: The Doppler effect is when the frequency of a sound or light wave is increased or decreased as the observer moves away or toward the source. This is why the pitch of sirens seems to change when they get closer and when they get further.
Answer:
v = 12.3 m / s
Explanation:
This is an exercise in kinetics in one dimension
v² = v₀² + 2 a x
In this exercise they tell us that the initial velocity is (v₀ = 13 m / s), the acceleration is a = -0.95 m / s2 and the distance x = 9.2 m
we substitute
v = √ (13 2 - 2 0.95 9.2)
v = 12.3 m / s
note that as the acceleration is negative the vehicle is stopping