Recent content by merlos

A. If two electrons are each 1.60×10−10 m from a proton, as shown in the figure, find the magnitude and of the net electrical force they will exert on the proton. B. Find the direction of the net electrical force electrons will exert on the proton. Enter your answer as an angle measured...

A train is traveling at 30.0 m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 Hz. a. What frequency (fapproach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first...

Okay, so the speed of sound v=345 m/s F1 = 345m/s / .36m =958 Hz F2 = 345m/s / .338m =1020.7 Hz so then beats/second = 1020.7-958?? =63 beats/second

Two tuning forks are producing sounds of wavelength 36.0 cm and 33.8 cm simultaneously. How many beats do you hear each second? I know that the # of beats/sec heard is equal to the difference of frequency 2 and 1. Frequency = 1/T = v/lambda. Don't feel that I have enough information

Electric toothbrushes can be effective in removing dental plaque. One model consists of a head 1.10 cm in diameter that rotates back and forth through a 70.0 degree angle 7600 times/min. The rim of the head contains a thin row of bristles. Part A: What is the average angular speed in...

calculating alpha?? A string is wrapped around a uniform solid cylinder of radius r, as shown in the figure. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block and cylinder each have mass m. Find the magnitude alpha of the angular...

So, I = (1/4)MR^2 + (1/3)ML^2 ?

In all the other parts ot the problem though I considered it a rod. Here's the problem: Find the moment of inertia about each of the following axes for a rod that is 0.280 cm in diameter and 1.70 m long, with a mass of 5.00×10−2 kg. A. About an axis perpendicular to the rod and passing...

The moment of inertia about an axis along the length of a rod is zero, correct?

1.) Momentum

1.) Kinetic energy 2.) Kinetic energy of block is transferred to the spring, where it's stored as potential energy

Combining Conservation Laws; where'd I go wrong? A 15.0 kg block is attached to a very light horizontal spring of force constant 350 N/m and is resting on a smooth horizontal table. Suddenly it is struck by a 3.00 kg stone traveling horizontally at 8.00 m/s to the right, whereupon the stone...

Having a difficult time determining which laws and equations to use? A 15.0 kg block is attached to a very light horizontal spring of force constant 350 N/m and is resting on a smooth horizontal table. Suddenly it is struck by a 3.00 kg stone traveling horizontally at 8.00m/s to the right...