Author Question: The most basic and irrefutable proof that energy cannot be created out of nothing or completely ... (Read 50 times)

azncindy619 · **on:** Jul 28, 2018

The most basic and irrefutable proof that energy cannot be created out of nothing or completely destroyed is that

a. Newton's laws of motion require it.
b. no proof is necessary. Energy is energy.
c. no experiments have ever proved the contrary.
d. the Sun would long since ceased to shine.
e. it would contradict Einstein's relativity.

Question 2

Determine the cost of operating an electric range for a year. Assume the cost of electricity is 0.08/kWh.

What will be an ideal response?

wtf444 · **Reply #1 on:** Jul 28, 2018

Answer to Question 1

C

Answer to Question 2

According to Table 8.7, a range with a large surface unit (the most common) uses
a total of 614 kWh + 197 kWh = 811 kWh every year. The net cost of cooking is 811
kWh x 0.08/kWh = 64.88.