Answer:
98.13m
Explanation:
Complete question
Daniel is 50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the building
CHECK THE ATTACHMENT
From the figure, using trigonometry
Tan(θ ) = opposite/adjacent
Where Angle (θ )= 63°
Opposite= X = height of the building
Adjacent= 50 m
Then substitute the values we have
Tan(63)= X/50
1.9626= X/50
X= 1.9626 × 50
X= 98.13m
Hence, the height of the building is 98.13m
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
What is the definition of law of conservation of energy
Answer:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.
Explanation:
Hope this helps!
Answer:
means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
Explanation: this is a shorter answer.
Answer:
6.0 s
Explanation:
Given:
u = 0 m/s
v = 15 m/s
a = 2.5 m/s²
Find: t
v = u + at
15 = 0 + (2.5) t
t = 6.0 s