Answer:
If you take the first example of the walk around the desk, it should be apparent that sometimes the distance is the same as the magnitude of the displacement. ... Since the displacement is measured along the shortest path between two points, its magnitude is always less than or equal to the distance.
Answer:
last is the answer.
increase the voltage in order to send energy faster.
Answer:
True
Explanation:
The team with the most points at the end of the game is the winner.
Answer:
Upthrust = 20 N
Explanation:
The question says that "A body weighs 100N in air and 80N when submerged in water. Calculate the upthrust acting on the body
?"
Upthrust is defined as the force when a body is submerged in liquid, then liquid applies a force on it.
ATQ,
Weight of body in air is 100 N
Weight of body in water is 80 N
Upthrust is equal to the weight of body in air minus weight of body in water.
Upthrust = 100 N - 80 N
Upthrust = 20 N
So, 20 N of upthrust is acting on the body.
- (a) Maximum emf: 90 V (2 sig. fig.)
- (b) Emf at π/32 s: 85 V.
- (c) t = 0.125 s.
<h3>Explanation</h3><h3>(a)</h3>
The maximum emf in the coil depends on
- the maximum flux linkage through the coil, and
- the angular velocity of the coil.
Maximum flux linkage in the coil:
.
Frequency of the rotation:
.
Angular velocity of the coil:
.
Maximum emf in the coil:
.
<h3>(b)</h3>
Emf varies over time. The trend of change in emf over time resembles the shape of either a sine wave or a cosine wave since the coil rotates at a constant angular speed. The question states that emf is "zero at t = 0." As a result, a sine wave will be the most appropriate here since
.
.
Make sure that your calculator is in the radian mode.
.
<h3>(c)</h3>
Consider the shape of a sine wave. The value of
varies between -1 and 1 as the value of
changes. The value of
at time
depends on the value of
.
reaches its first maximum for
when what's inside the sine function is equal to
.
In other words, the first maximum emf occurs when
,
where
,
and
.
.