b. point D
c. point B
d. point C
B.The pressure of the water decreases.
C.The flow rate of the water decreases.
D.The density of the water increases.
The flow rate of the water decreases as the cross section is decreases. So, the correct option is C.
Bernoulli’s principle states that the total mechanical energy of a moving fluid, which includes the gravitational potential energy of height, the energy associated with fluid pressure, and the kinetic energy of fluid motion, remains constant.
The formula for Bernoulli’s principle is given as follows:
From the equation of continuity for incompressible fluids which is Bernoulli's equation
a v = constant
where, a is the area and v is the velocity.
Pressure is inversely proportional to the velocity.
From the image we can see that area of cross-section at A is greater than at B,
thus,
which means velocity of water will increase at B and water pressure will decrease.
Hence, the correct option is C, i.e. the flow rate of water decreases.
Learn more about Bernoulli's equation, here:
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C. The flow rate of the water decreases
Answer: kinetic energy will reduce
Explanation: kinetic energy is a function of temperature the higher the temperature the more the kinetic energy of the molecules in the substance
The lower the temperature the lower the kinetic energy