Line spectra are obtained when individual elements are heated using a high-voltage electrical discharge. This heating causes excitation of the element and a subsequent emission of distinct lines of colored light are obtained. Each element has its own unique emission line spectrum; therefore, if any of the tested substances were the same, their spectra would match. However, this is not the case so none of the substances are the same.
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Answer:
Part a)
Part b)
Part c)
Explanation:
Velocity just before it strike the ground is given as
since there is no friction in horizontal direction so its speed in horizontal direction will remain same
Part a)
velocity in X direction
time taken by the skier to reach the ground is given as
now in the same time it will cover vertical distance
so magnitude of initial speed is given as
Part b)
Direction of velocity
Part c)
Now in order to find the height of the ramp we can find the vertical displacement
Hydrogen is the original fuel that keeps a star "burning" by nuclear fusion.
No hydrogen and the star will die unless it can start use helium to produce energy.
Answer:
The speed of the receiver is 0.074 m/s.
Explanation:
Given that,
Mass of the receiver, m = 96 kg
Mass of the ball, m' = 0.42 m/s
Initially the receiver is at rest, u = 0
Initial speed of the ball, u' = 17 m/s
We need to find the speed of the receiver after the collision. It is a case of conservation of momentum. Let V is the speed of the receiver.
V = 0.074 m/s
So, the speed of the receiver is 0.074 m/s. Hence, this is the required solution.
Answer:
Apples, empty bottles, balloons, etc.
Explanation:
The air is the cause of why these object are less dense than water.