Answer:
66.7%
Explanation:
There are 6 pulleys, so the mechanical advantage is 6.
The theoretical force needed to overcome 1200 N is therefore:
1200 N / 6 = 200 N
The actual force is 300 N. So the efficiency is:
200 N / 300 N × 100% = 66.7%
Answer:
B) Adding many new features to the model makes it more likely to over fit the training set.
Explanation:
Increasing number of features without increasing the amount of training data, increase over fitting in the model because features may be irrelevant and increase the redundant information in the model.
I think that numbers one, three, and four are true
This is kind of an awkward situation.
A, B, and C are definitely false:
A ... gasoline is not a renewable resource
B ... hydroelectric dams don't use wind for anything; windmills do
C ... fossil fuels are not renewable resources
So that leaves D, but D is partly absurd too.
Natural gas burning does not produce gases to turn the turbines. Natural gas is burned to produce HEAT, just like on the stove in my kitchen. The heat is used to boil water, and the steam from the boiling water is what turns the turbines to generate electrical energy.
But I guess you gotta pick <em>choice-D</em> as the answer.
Answer:
C- Light
Explanation:
Light waves are electromagnetic waves. Visible light is one of the many types of electromagnetic waves. The others are mechanical waves.