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A lightweight ball hangs by a thread. When a charged rod is held near, the ball moves toward the rod, touches the rod, then quickly "flies away" from rod. Explain this behavior in two-three sentences.
The front and rear sprockets on a bicycle have radii of 8.67 and 5.55cm, respectively. Calculate the linear speed (in cm/s) of the chain as it moves between the sprockets
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
A 200, 47.0 cm-diameter turntables rotate on frictionless bearings at 70. A 24.0 block sits at the center of the turntable. A compressed spring shoots the block radically outward along the frictionless groove in the surface of turntable.
A certain automobile manufacturer claims that its deluxe sports car will accelerate from rest to a speed of 44.5 m/s in 8.45 s. Determine the average acceleration of the car
The linear density of the A string on a violin is 9.69 x10-4 kg/m. A wave on the string has a frequency of 323 Hz and a wavelength of 40.7 cm. What is the tension in the string?
a 22 turn circular coil of radius 4.60cm and resistance 1.00 ohms is placed in a magnetic field directed perpendicular
The potential energy of a particle moving in the x-y plane is U=a/(x^2+y^2)^1/2, where a is a constant. What is the force on the particle
After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. Calculate the average density of the white dwarf
Two large flat planes are separated by a distance d. the plates are connected to a battery. Write an expression for the capacitance
A stick with a mass of m and a length of L is pivoted about one end so it can rotate without friction about a horizontal axis. As it swings through the vertical, determine the change in gravitational potential energy that has occurred. Use g for the..
suppose we excite a two-loop standing wave in a rope using tension of 1.14 n. what tension n should we apply to the
A laser-beam is fired through the air into a solid block of diamond (don't ask where we got it, it's a secret). What is the angle of refraction within the diamond
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