Answer:
7) Electrical Energy used = 5000 J
8) Check below for answer and explanation
Explanation:
7) Let the Sound Energy Produced = SE
Electrical Energy = EE
Sound energy produced, SE = 1000 J
% of Electrical energy converted to sound = 20%
SE = 20% of EE
SE = (20/100) * EE
1000 = 0.2 EE
EE = 1000/0.2
EE = 5000 J
Electrical Energy used = 5000J
8) The vehicle's efficiency = 18%
Energy loss = 82%
The 82% energy loss in the vehicle can be due to the following reasons:
a) Heat generated by the exhaust of the vehicle
b) Noise generated by the vehicle
c) Frictional force in the engine
d) Combustion
The answer that best answer this question is A
Answer:
M.A = 8
Explanation:
Given the following data;
Circumference = 2cm
Number of threads = 4
To find the mechanical advantage (M.A);
But,
Pitch = 0.25
Substituting the values into the equation, we have;
M.A = 8
Therefore, the mechanical advantage of the screw is 8.
Answer:
Essentially, the hypothesis statement is a prediction for what you think will happen if you take a certain type of action to resolve a problem. The hypothesis usually identifies what is going to be changed and the action's potential outcome, as well as why you think the change will have that particular result.
Explanation: