Motion of an Iron Block in Water

AI Thread Summary
The discussion revolves around calculating the mass of water in a vessel containing an iron block and its interaction with a spring. An iron block with a mass of 1 kg is submerged in 10 liters of water, and the user attempts to calculate the mass of displaced water using the iron's density. There is confusion regarding the calculations, particularly in determining the correct mass of water after accounting for the iron block's volume. The conversation shifts off-topic with irrelevant comments about color and personal inquiries. The main focus remains on the physics problem involving the iron block and water displacement.
mattmannmf
Messages
170
Reaction score
0
An iron block of the mass 1 kg is suspended on a spring of the spring constant 130 N/m , and merged into a vessel with 10 liters of water. The mass is displaced by 10 cm from its equilibrium position, and released.

a. What is the mass of water in the container in kg?

I think iron density is 7860... so i solved for volume which is 1/7860=block..then figured out the mass in water by using volume* density of water (1000)= .127. then subtracted that to find the new mass... but it isn't correct, not sure what I am doing wrong
 
Physics news on Phys.org
Surreal.
And what color was the bear?
 
ummm...i really don't think color matters in this type of problem (if so its not THAT advance...)
 
mattmannmf said:
ummm...i really don't think color matters in this type of problem (if so its not THAT advance...)

How old are you?

A woman without a man is like a fish without a bicycle.
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top