Answer:
B. A large cross sectional area,
Explanation:
To permit a large flow of water in a pipe, the cross sectional area of the pipe must be significantly large. According to the flow rate equation:
V =
Where:
Q is the Volume flow rate and it is the volume of fluid that flows through the pipe
V is the velocity of the fluid in the pipe
A is the cross sectional area of the pipe.
From the equation, we see that for a larger amount of water to flow in a pipe, the cross-sectional area must be very large. In short, Q varies directly as A.
Answer:
O C. Light energy
Explanation:
it conducts energy in it and is an energy itself.
False
Explanation:
When we graph y as a function of x, the variable x is known as the independent variable and not dependent variable.
Variables are quantities are can take several values and are constantly changing.
- Scientists likes to make the x-axis take the independent variables
- The y-axis for the dependent variables.
- Independent variable are variables that can be tagged as the cause.
- Dependent variables are the effect of the changing independent variables.
- Dependent variables responds to changes in the independent variable and produces some sort of pattern.
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The elbow is considered to be a lever, which is a simple machine. Other levers apart from the elbow are jaw, ankle, knee, etc.
This means that it is false that the <span>elbow is an example of a compound machine found in the human body.</span>
Answer:
B. twice as much kinetic energy
Explanation:
Lets take the mass of the first marble =2 m
the mass of the second marble = m
We know that velocity of particle does not depends on their mass that is the velocity of both mass will be same after dropping from the roof.
We know that kinetic energy of a mass is given as
Kinetic energy for heavier mass
Kinetic energy for light mass
KE=2 KE '
Form above two equation we can say that ,the kinetic energy for the heavier mass is twice the lighter mass.
Therefore the answer will be B.