Recent content by Addem

The work to raise 1 kg a vertical distance of 3 m is 9.8*3 N, but my point is that not every quantity of water must be raised 3 m, unless we assume the hose begins empty and ends empty and runs for unit time I suppose. I may not be appreciating what you're getting at.

Homework Statement Water is pumped steadily out of a flooded basement at 5.0 m/s through a hose of radius 1.0 cm, passing through a window 3.0 m above the waterline.What is the pump’s power? Homework Equations Volume and mass flow rates are constant R_v = Av; \quad M_v = \rho A v...

In some odd coincidence I just finished watching a YouTube video in which the presenter says the pressure at the top is 0. I wasn't actually aware of that but I guess that makes good sense and answers the question! Thanks. :)

Homework Statement I took a stab at the following question in a book: "In one observation, the column in a mercury barometer has a measured height h of 740.35 mm.The tem- perature is -5.0 C, at which temperature the density of mercury r is 1.3608 10^4 kg/m^3 .The free-fall acceleration g at...

Crap I just realized in my calculation I didn't include the gravitational constant. If I just take the answer I have an multiply by 9.8 it comes out correct.

Homework Statement Two cylinders of base area 4cm2 hold fluid of density 1.30(103). In one the fluid has height .854 and the other has height 1.560. They are then joined and the fluids equalize in height--find the work done by gravity on the fluid. Homework Equations A version of...

In part three, the measurement for the gravitational constant is 9.8 using two significant digits. See what you get when you incorporate that.

Sorry, never mind, I found my mistake--I was decomposing the components of force in the wrong way at the contact point with the wall.

[EDIT: Never mind about this problem, I found my mistake.] 1. Homework Statement A uniform ladder of mass m and length L rests against a wall. The coefficients of static friction between the floor and the ladder and between the wall and the ladder are equal to each other (μ). What is the...

Oh wow, can't believe how simple my mistake was. Thanks for the hint, haruspex!

Homework Statement https://courses.edx.org/static/content-mit-mrev~2013_Summer/problems/MIT/rayyan/check_points/Pictures/BK85.png A horizontal uniform bar of mass 220 kg and length L = 3.0 m is placed on two supports, labeled A and B, located as shown in the diagram. A block of mass 30 kg is...

Alright, I think I solved this: https://drive.google.com/file/d/0B-HFS9bOMNAcZEtpTG5sUWlSSXM/edit?usp=sharing

I'm a bit confused about this. The applied force is purely horizontal, so as far as it acts on the plane, I would think it acts in the horizontal direction. Do you mean that, as the plane acts on the block, the action is purely perpendicular to the incline? So the force the plane applies to...

Trying to make it appear, but it doesn't seem to be working. I've added a link, maybe that will work.

Homework Statement The problem is described and drawn here: https://drive.google.com/file/d/0B-HFS9bOMNAcMjNacXlha0Z6cVk/edit?usp=sharing Edit: The picture seems not to be showing up, so the address is: https://drive.google.com/file/d/0B-HFS9bOMNAcMjNacXlha0Z6cVk/edit?usp=sharing...