Answer:
Explanation:
Amplitude is the distance between the neutral line and either extreme.
Wavelength is the distance from a point on one wave to the equivalent point on the next wave.
Answer:
an armature a permanent magnet brushes slip rings
Explanation:
Answer:
Uniform acceleration means that the object is accelerating at a constant rate. Since there is still acceleration, velocity is not constant. In fact, the velocity is increasing. This means that the object is moving faster and faster at a constant rate.
This graph is a displacement-time graph so its gradient would represent the velocity of the object. The velocity increases hence the gradient should increase (which means that the graph must be steeper and steeper with increasing time).
Constant gradient of a displacement-time graph would mean that there is no acceleration since gradient of the graph does not change so velocity is constant.
Note that it is the<em> </em><em>rate</em><em> </em><em>of</em><em> </em><em>change</em> of velocity that is constant during uniform acceleration, not velocity.
Answer:
m = 24146.34 kg
Explanation:
The heat of fusion is defined as the amount of heat required to melt a unit mass of a substance completely. Hence, it can be calculated by the following formula:
where,
m = mass of copper = ?
Q = Heat absorbed by rod = 4950000000 J
H = Heat of fusion of copper = 205000 J/kg
Therefore,
<u>m = 24146.34 kg</u>