Answer:
The difference in the amount of energy transferred by the two bulbs is 1200 J.
Explanation:
The energy transferred by the two lightbulbs can be calculated with the given equation:

Where P is the power and t is the time
For the 60 W lightbulb:

For the 100 W lightbulb:

Hence, the difference in the amount of energy transferred is:

Therefore, the difference in the amount of energy transferred by the two bulbs is 1200 J.
I hope it helps you!
This is simple question and easy to understand.
so first you use a formula to calculate frequency of the wave.
v _ stands for velocity a.k.a speed
f_ stands for frequency which you have to find.
(pronounced lemda)_ stands for wavelength.
Then you gonna place all your values according to you have in the formula as shown then solve for f.
Finally, you use the time formula
where
T_ is period a.k.a time which equal to the reciprocal of frequency or equal to 1/f.
Simply input your values according to the formula and you your answer as 0.5s
To solve this problem we will apply the concept related to frequency, by which it is defined as the relationship between the speed of the wave and the wavelength. Since the frequency is the inverse of the period, this relationship will also be reversed. That is to say,

Here,
v = Velocity
= Wavelength
Now the period is defined as,

Therefore

Replacing we have that,


Therefore the period of the wave is 
Answer:
8.40 m/s
Explanation:
Slope of the plot is 0.119
Slope of a plot is given by the change in y direction divided by the change in x direction
Here, the y axis represents inverse wavelength and the x axis represents frequency.
f = Frequency (Hz, assumed)
v = Phase velocity (m/s, assumed)
λ = Wavelength (m, assumed)
So, slope

Now,


The speed of sound travelling in the tube is 8.40 m/s
Answer: The expected population that wants flexible working hours in ranging from 58% to 62 %.
Explanation:
Percentage of sample respondents agreed for flexible working hours = 60%
The margin of the error = ± 2%
The expected population that wants flexible working hours in ranging from:
lower range
upper range
that is 58% to 62 %.
The expected population that wants flexible working hours in ranging from 58% to 62 %.