Question#7:a) A television uses 1500J of electric energy to produce 1100J 1 point
that's converted to sound and light. The TV has an efficiency of
- 73.3%
- 26.6%
- 136.3%
Question#7:b)In this TV,
% is wasted energy
- 73.3%
- 26.6%
- 36.3%

a.73.3%

b.26.6%

Explanation:

a. The efficiency is the energy output, divided by the energy input, and expressed as a percentage.

#Given the energy input as 1500J and the subsequent output as 1100J, the TV's efficiency is calculated as:

Hence, the TV has an efficiency of 33.3%

b. From a above, we know that the TV has an output of 1100J and input of 1500J.

-We therefore calculate it's wastage as the difference between output and input:

Wastage=Energy Input-Energy Output=1500J-1400J=400J

Hence, the TV has wasted of 26.6%

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation: