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You are given a wooden rod 70 cm long and asked to drill a small diameter hole in it so that when pivoted about the the hole the period of the pendulum will be a minimum. How far from the center should you drill the hole?
(in cm)
By means of a rope whose mass is negligible, two blocks are suspended over a pulley, find the mass of the pulley
A object-spring system oscillates with an amplitude of 2.8 cm. If the spring constant is 205 N/m and object has a mass of 0.50 kg, evaluate the maximum acceleration of the object
An ice skater slides (without pushing) across a frozen pond for 25.0 m before coming to a stop. If the coefficient of kinetic friction is 0.050, how fast was the skater initially moving
A real battery is not just an emf. We can model a real 1.5v battery as a 1.5v emf in series with a resistor known as the "internal resistance", What is the potential difference between the terminals of the battery
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet). what is the angle of refraction for each wavelength
The pressure in a traveling sound wave is given by the following equation. p = (2.1 Pa) sin ?[(1.40 m-1)x - (280 s-1)t], Find the pressure amplitude and Find the wavelength
A 745 N window washer is standing on a scaffold supported by a vertical rope at each end. What is the tension in the rope on the left
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
A massless pulley is pulled upward with a force = 140 N. A rope passes over the pulley with a mass, M1 = 5 kg at one end, What is the acceleration of the two masses
Three charges are positioned on a line. Q1= -2uC, Q2= +5uC, Q3= +3uC. The distance between Q1 and Q2 is a=0.25m. Find the direction of the electric force acting on the charge
A uniform 1.7-kg rod that is 0.97 m long is suspended at rest from the ceiling by two springs, one at each end. Both springs hang straight down from the ceiling. The springs have identical lengths when they are unstretched. Their spring constants are..
A professional golfer is examining a video of a practice swing. The high-speed footage shows that his club is in contact with the ball (which was initially at rest on the tee) for only 0.471 milliseconds, and the radar gun clocks the speed of the ..
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