Answer:
a) 13.2kWh
b) 118800 cents
Explanation:
(a) To find the energy consumed during one month you use the following formula:
(1)
E: energy consumed
P: power of the tv (energy consumed per hour) = 110 W
t: time
The tv is on for four hours per day. You first calculate the number of hours, in which the tv is on, for one month:
Then, the tv is on 120 h on a month.
Next, you replace the values of P ant t in the equation (1) for E:
(b) If the price for kWh is 9 cents you have for the tv:
hence, the cost of the energy consumed by the tv is 118800 cents in on month
Answer:
Elastic potential energy, E = 200 J
Explanation:
It is given that,
Spring constant, K = 4 N/m
initial stretching in the spring, x = 5 m
Finally, it is stretched an additional 5 m i.e. x' = 5 m
Let E is the elastic energy in the spring after Varg stretches the spring. it is given by :
E = 200 J
So, the elastic energy in the spring after Varg stretches the spring is 200 J. hence, this is the required solution.