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Results tagged with homework-and-exercises
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user 264243
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
0
votes
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Why a large force is required to rotate a wheel at 60 rpm than that required to rotate it at...
I am assuming that i have a wheel of say 1 m radius. And it requires 10 hp(horsepower) to operate.
I found out that
hp= (Torque x rpm)/5252
So i am considering the case for rpm 60 and rpm 1500
for rp …
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0
votes
1
answer
167
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Is there any way by which one can increase the output height in hydraulic lift?
For example:
If the lift cylinder were $25 \text { cm }$ in diameter and the small cylinder were $1.25 \text { cm }$ in diameter, then the ratio of the areas is $400$, so the hydraulic press arrangem …
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votes
1
answer
2k
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When the alternator is made to rotate in opposite direction will it effect the electricity g...
Suppose that point c (i.e middle of the wheel as shown in the figure) is connected to the alternator.
for the first one minute the wheel is made to rotate in the direction A(i.e in clockwise directi …
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2
answers
1k
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Will the metal block will sink or float in the following case?
We know that $\text{density}= \frac{\text{mass}}{\text{volume}}$, and density of water is $1000\, \text{kg/m}^3$.
If I want to float a $100 \,\text{kg}$ metal block then using the above formula of den …
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-2
votes
1
answer
71
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What is relation between weight and height in hydraulic lift? [closed]
I am trying to lift a 10kg weight using 1kg weight as shown in diagram.
block A is 1kg and block B is 10kg will the lighter block be able to lift the heavier block. Also what will bw the height by …
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0
votes
1
answer
37
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Am i right in determining the pressure being applied to the below side of the plate? [closed]
In the image shown below the an iron plate is dividing the cylinder into two halves with 15 meter and 1 meter respectively.
The area of the cylinder is 0.196 m(sq).The liquid inside the cylinder is wa …
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0
votes
1
answer
1k
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How to make the weight float on water? [closed]
The height of the cylinder is $3 \text { m }$ and the diameter is $45 \text { cm }$. The cylinder is filled with water. The block is of weight $30\ \text { kg }$ with dimensions $30\text { cm} \times …
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3
answers
658
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I want to know how law of conservation of energy holds in the generation of electricity in d... [closed]
Basically law of conservation states that input energy is equal to the output energy. But i was wondering that in case of generating electricity in dams no input energy is required. As the dam only co …
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