Recent content by kamhogo

Note to everybody reading this post: please disregard all the nonsense I wrote above. :)

Right. Thanks!

Oh I get it. The two graphs represent a static situation (quadratic) and a dynamic one (linear). Senseless to try and combine them.I meant that as the rod gets twisted, the particles that make it up are no longer arranged in the same way so it is not really the same rod at the location of the...

Sorry about that. The rod is horizontal and normal to the plane of the disc, attached at it's centre. Weights are attached at the rim of the disc but not at the same height as its centre, lower rather (measure not taken). When you hang a weight, the disc rotates (its rim is graduated in mm) but...

Homework Statement We had this elementary experiment in class. An aluminium rod is fixed at one end and at the other end you have a disk. You hand increasingly heavy weights on the disk and measure how much the rod shears (twists). We were asked to make a graph of the shear torque vs. angle of...

So I just tried placing the pivot at the upper hinge and I think I got it: Torque of Fg = 0.45m*294N*sin90°=132.3 Nm Torque of Fg is opposed by Torque of R2, so Torque R2 = 132.3 Nm, lever arm = 1.5m, so R2 = 88.2 N = R1Thanks a lot :)

1. Homework Statement The door has a mass of 30 kg, is 200 cm long and 90 cm wide. The hinges are installed at 25 cm from the bottom (R2) and 25 cm from the top (R1). What are is the magnitude of the force exerted by each hinge on the door? The door is in a state of static equilibrium...

Homework Statement A 60 mL syringe filled with air is connected to a pressure sensor. The latter reads 100kPa. You then push on the piston until it stops moving. You now have 30 mL and the pressure sensor reads 200kPa. What force is used to keep the syringe rubber at the 30 mL mark...

Hum, on second look it looks more like (2/3)(100*10^-6m). Which gives Vneutron = 2.1*10^2 m/s; which is the correct answer! Thanks a lot!

Homework Statement An experiment was performed in which neutrons were shot through two slits spaced 0.10 mm apart and detected 3.5 m behind the slits. The following figure shows the detector output. Notice the 100 μm scale on the figure. To two significant figures, what was the speed of the...

But then in the last step I get : (5.8946*10^(-7)) / cos (0.5*pi) = infinity...

So 120*pi*t = 1.570796327 t = 0.004167 s ...?? And why in radians?

Homework Statement A 40-turn, 4.0-cm-diameter coil with R = 0.40Ω surrounds a 3.0-cm-diameter solenoid. The solenoid is 20 cm long and has 200 turns. The 60 Hz current through the solenoid is I = Io sin (2Πft). What is Io if the maximum current in the coil is 0.20A? Homework Equations Ncoil =...