- #1
pureouchies4717
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made new topic
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Is Collaborative Homework Increasing Error Rates in Physics Assignments?
- Thread starter pureouchies4717
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AI Thread Summary
Collaborative homework in physics may lead to increased error rates due to discrepancies in numerical values used in assignments. Students often encounter rounding issues and variations in test questions that can contribute to confusion and incorrect answers. One participant noted that their teacher's test numbers are intentionally varied, which complicates accuracy. Working with a partner who has different numbers can further exacerbate these issues, resulting in incorrect solutions. Overall, the discussion highlights the challenges of collaborative homework in achieving precise outcomes in physics assignments.
- #2
Da-Force
- 66
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Dude, that's pretty much right LOL
The book usually rounds up a little bit.. When dealing with gravitational stuff past the surface, it gets messy when we want to be accurate.
My teacher always makes test with numbers not VERY close to what we always get but off by like + or - 1
The book usually rounds up a little bit.. When dealing with gravitational stuff past the surface, it gets messy when we want to be accurate.
My teacher always makes test with numbers not VERY close to what we always get but off by like + or - 1
- #3
pureouchies4717
- 98
- 0
haha, actually its wrong. i just got lucky. I am doing this homework with a friend (who has different numbers) and it came out to be a wrong answer. thanks for responding
Neglect gravity other than that of water; neglect friction.
F1=ρgsh=1000*10*1*(1+4)=50000 N;
F1=ρgsh=1000*10*0.1*4=4000 N;
F3=50000-4000=46000 N?
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook.
Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water.
I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system
$$M(t) = M_{C} + m(t)$$
$$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$
$$P_i = Mv + u \, dm$$
$$P_f = (M + dm)(v + dv)$$
$$\Delta P = M \, dv + (v - u) \, dm$$
$$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$
$$F = u \frac{dm}{dt} = \rho A u^2$$
from conservation of momentum , the cannon recoils with the same force which it applies.
$$\quad \frac{dm}{dt}...
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