30 POINTS! (Question is located in picture under graph)
2 answers:
Answer:
B) The unit of the variable on the y-axis is incorrect.
Explanation:
The question to this exercise is in the picture. It is '' What makes the above graph incorrect? ''
Let's analize each option :
A) The variables are plotted along incorrect axes. This is wrong because actually the graph is well-plotted. In a displacement versus time graph we put the time variable in the x-axis and the displacement variable in the y-axis.
B) The unit of the variable on the y-axis is incorrect. This is true. In the graph we can see that when the units of displacement are units of lengths such as meters or miles for example. Therefore, the B) is a correct option
C) The scale for each axis is not appropriate for the data. This is wrong. Because of the scale for each axis we are able to see the five data points which are (1,2) ; (2,4) ; (3,6) ; (4,8) and (5,10)
D) The data points have not been plotted clearly. This is wrong. All data points are well-plotted signposted with a point at the intersection of the dashed coordinated lines. For example, the point (1,2) is at the intersection of two lines : one dashed line perpedicular to the x-axis at 1 and one dashed line perpendicular to the y-axis at 2
E) The data points have not been plotted accurately. This is wrong. The data points have been plotted accurately at the intersection of the coordinated dashed lines.
Finally, the only correct option is B)
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Highest energy photon absorbed:
Explanation:
An atom is said to be (positively) ionised when it absorbs a photon, and as a consequence, an electron becomes energetic enough to escape the atom, leaving an excess of positive charge behind.
In order for the electron to escape, the energy of the absorbed photon must be exactly equal to the (negative) energy of the level in which the electron lies.
For an hydrogen atom, the energy levels are given by
where this energy is measured in electronvolts, and n is the number of the energy level.
Since the energy is negative, this means that the electron which requires most energy is the one lying in the ground state (n=1). Therefore, for an electron in the ground state, the most energy that can be absorbed from the incoming photon is
Converting into Joules, this is equal to
Learn more about hydrogen atom:
#LearnwithBrainly
Answer with Explanation:
We are given that mass of block=0.0600 kg
Initial speed of block=0.63 m/s
Distance of block from the hole when the block is revolved=0.47 m
Final speed=3.29 m/s
Distance of block from the hole when the block is revolved=
a.We have to find the tension in the cord in the original situation when the block has speed =
Because tension is equal to centripetal force
Substitute the values
b.
c.Work don=Final K.E-Initial K.E