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ivanzaharov [21]
1 year ago
13

Four rivers have the same volume of water flow over time but fall from the different heights to power hydroelectric dams. which

dam would provide most hydroelectric power?
A. dam c: fall height of 135 feet
B. dam B: fall height of 75 feet
C. dam A: fall height of 175 feet
D. dam D: fall height of 100 feet
Physics
1 answer:
sveticcg [70]1 year ago
3 0

Answer:

I thibknits 175

Explanation: It's the furthest

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To view an interactive solution to a problem that is similar to this one, select Interactive Solution 7.24. A 0.0129-kg bullet i
ipn [44]

Answer:

t=0.42s

Explanation:

Here you have an inelastic collision. By the conservation of the momentum you have:

m_1v_1+m_2v_2=(m_1+m_2)v

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m2: wooden block mass

v1: velocity of the bullet

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By noticing that after the collision, both objects reach the same height from where the wooden block was dropped, you can assume that v is equal to the negative of v2. In other words:

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Where you assumed that the negative direction is upward. By replacing and doing v2 the subject of the formula you get:

-(0.0129kg)(767m/s)+(1.17kg)v_2=(1.1829kg)(-v_2)\\\\v_2=4.20m/s

Now, with this information you can use the equation for the final speed of an accelerated motion and doing t the subject of the formula. IN other words:

v_2=v_o+gt\\\\t=\frac{v_2-v_o}{g}=\frac{4.2m/s-0m/s}{9.8m/s^2}=0.42s

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4 0
3 years ago
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Explanation:

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