Answer:
a)
b)
Explanation:
From the question we are told that:
Wavelength
Velocity
a)
Generally the equation for distance between her and the wall d is mathematically given by
Since
The First Anti node distance is
Therefore
b)
Generally the equation for her up-and-down motion is mathematically given by
Answer:
If the absorbed beam is monochromatic (one wavelength) then it excites the H atom to some state n.
When that state decays, some of the atoms may decay to state 1, others to state 2, and still others to state 3
The net energy emitted in such a case would depend on:
n -1, n - 2, n - 3 which would produce 3 different wavelengths
Answer:
75.56 m/s
Explanation:
The following data were obtained from the question:
Initial velocity (u) = 0 m/s
Time (t) = 7.71 s
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =..?
Thus, we can obtain the velocity (v) with which the pacifier hit the water as follow:
v = u + gt
v = 0 + (9.8 × 7.71)
v = 0 + 75.558
v = 75.558 ≈ 75.56 m/s
Therefore, velocity with which the pacifier hit the water is 75.56 m/s
Answer:
The correct answer is:
It asks about a cause-and-effect relationship between two variables (A)
Explanation:
Scientific investigations are aimed as developing a hypothesis and proving the validity or not of the hypothesis developed. In order for these hypotheses to be tested, experiments must be done, and the experiments are designed based on the identification of a cause-and-effect relationship existing between two variables to be tested, where the "cause" is varied to various degrees and the "effect" of the variation is recorded. Therefore, knowing the cause-and-effect relationship will guide the experimental design, which will be aimed at manipulating the causes to see how these manipulations affect the second variable.