Questions tagged [homework]
The homework tag has no usage guidance.
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How to find the image of an object in case of a tilted spherical mirror?
Problem
A lens is used to obtain real image of a point(/small object) at $(75,0)$. This acts as the virtual object for a convex mirror of radius of curvature $100cm$ placed at $(50,0)$ tilted at $30°$ ...
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I was solving fluctuating load problems and the word "static" confused me
Here's a snippet of the question that was asked a couple of years ago in university exam:
A cantilever beam made of cold rolled steel for which ultimate tensile strength =540 MPa and Yield tensile ...
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Can't find correct reaction loads for statically indeterminate problem
been working on this problem all day and I feel as if I am going crazy. I am using SkyCiv to confirm the right answer and cannot get close to it, I have messed up both my attempts at superimposing and ...
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How to calculate internal convection loss in a sealed container?
Say I have a box with a 1m x 1m x 1m interior wall dimension.
The side walls and the floor are 10cm of styrofoam, with a thermal conductivity of 0.03 W/m K.
The top is 1cm thick opaque plastic with ...
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How do I derive the expression of boundary work in relation to a polytropic index?
I don't understand how to derive the formula,
How do I derive the expression of boundary work in relation to a polytropic index?
I used the Definition of boundary work for a polytropic index, the ...
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Energy conservation on SHM in springs
In the above spring block arrangements, the time period is asked for $K_1=2K$ left spring and $K_2=K$ right spring.
Now at equilibrium,
$$T=K_2x=Kx=mg$$
$$2T=K_1y=2Ky=2mg \implies x=y$$ for movable ...
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Hydrographic Survey Problem
I have been trying, but I can't figure out how I should solve this using the area velocity method. It is the only method as our professor taught us.
Any help would be appreciated.
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Cooling steel by putting it in water ; what is the final temperature
Below is a problem I made up and did. I am hoping that you will tell me that my solution is right.
Problem:
A $5$g piece of steel at $30$°C is placed in $400$ ml of water at
$20$°C. Assume that all ...
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How to draw a isometric view of the block in the picture below?
Can anyone give me some guidance with this question? I'm finding it a bit difficult.How is the object suppose to look like?
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How do I draw a circuit for a conducting loop inside a solenoid?
To solve a homework problem, I need to redraw the following diagram in circuit form.
The large blue circle represents the solenoid. Inside the solenoid, the two gray semicircles represent a wire loop,...
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Impact of decreasing weight from a part of body w.r.t tipping
If I decrease the weight from top portion of the body keeping all dimensions same, the center of mass shifts downwards, but does it makes it more stable against tipping from perpendicular forces ?
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Conical pulley system and transmission ratio (closed)
I tried asking this on other SE forum but i think this is the correct one:
Basically our teacher has sent us quite a lot of exercises but I can't get past this one which says: a pulley cone consists ...
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Derivation of deformation equation given thermal expansion
I'm working on a thermal expansion problem out of Beer & Johnston's Mechanics of Materials and I'm a bit confused by the underlying rationale of one of the steps in the solution process.
In the ...
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Calculating two diagonal forces
When I tried to calculate the force exerted on the rope 'a' I get that it is equal to 5N when the block has a force of 10N. Do I instead need to divide by 30 since the sum of the two angles is 30 ...
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Continuity / conservation of mass
Two different incompressible fluids a and b flow into a chamber through two circular ports of area 0.1 and 0.2 m2 respectively.
Fluid a is of density 1,200 kgm−3 and flows directly into the chamber ...
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