Which of the following statements about colloids is FALSE?
1 answer:
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Answer:
The electric field is
Explanation:
Given that,
Radius = 2.00 cm
Number of turns per unit length
Current
We need to calculate the induced emf
Where, n = number of turns per unit length
A = area of cross section
=rate of current
Formula of electric field is defined as,
Where, r = radius
Put the value of emf in equation (I)
....(II)
We need to calculate the rate of current
....(III)
On differentiating equation (III)
Now, put the value of rate of current in equation (II)
Hence, The electric field is
Gamma-rays, the explanation and information is found in the image below.
Answer:
Approximately to the right (assuming that both astronauts were originally stationary.)
Explanation:
If an object of mass is moving at a velocity of
, the momentum
of that object would be
.
Since momentum of this system (of the astronauts) conserved:
.
Assuming that both astronauts were originally stationary. The total initial momentum of the two astronauts would be since the velocity of both astronauts was
.
Therefore:
.
The final momentum of the first astronaut (,
to the left) would be
to the left.
Let denote the momentum of the astronaut in question. The total final momentum of the two astronauts, combined, would be
.
.
Hence, . In other words, the final momentum of the astronaut in question is the opposite of that of the first astronaut. Since momentum is a vector quantity, the momentum of the two astronauts magnitude (
) but opposite in direction (to the right versus to the left.)
Rearrange the equation to obtain an expression for velocity in terms of momentum and mass:
.
.
Hence, the velocity of the astronaut in question () would be
to the right.