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A wave in the ocean has amplitude of 3 m. Winds pick up suddenly, increasing the wave's amplitude to 6 m. How does this change in amplitude affect the wave's frequency and the amount of energy it t
A non-conducting rod with a uniformly distributed charge +Q. The rod forms a 10/21 of circle with radius R and produces an electric field of magnitude Earc at its center of curvature P. If the arc
A 16.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 81.5 N and is directed at an angle of 30.0° above the horizontal. Determi
The glider is pushed in 10.2 cm and released. A student with a stopwatch finds that 12 oscillations take 14.5 s. What is the spring constant?
A 55.0 kg pole vaulter running at 8.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the
What is the force of air resistance on a 100kg sky-diver who is falling with a constant acceleration of 4m/s/s?
A 1.00 g cork ball with charge 2.00 uC is suspended vertically on a 5.00 m long, light string in the presence of a uniform, downward-directed electric field of magnitude E = 1.00 x 10^5 N/C. If th
For what values x will the sound this person hears be (a) Maximally reinforced, (b) cancelled? Limit your solution to the cases where x is less then or equal to 1.5 m.
A bat flies toward a wall, emitting a steady sound of frequency 2.00kHz . This bat hears its own sound plus the sound reflected by the wall. How fast should the bat fly in order to hear a beat freq
A 340 piano slides 3.8 down a 32 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure ). The effective coefficient of kinetic friction is
From a height of 35.0 m, a 1.25 kg bird dives (from rest) into a small fish tank containing 50.0 kg of water. What is the maximum rise in temperature of the water.
A charge -342e is uniformly distributed along a circular arc of radius 4.10 cm, which subtends an angle of 68o. What is the linear charge density along the arc?
A spring is hung from the ceiling. A 0.550 kg block is then attached to the free end of the spring. When released from rest, the block drops 0.130 m before momentarily coming to rest.
An Electron gun emits a beam of 12.0 kev electrons toward the screen. How far horizontally is the deflected by the Earth's magnetic field if the electron gun is 20cm from the screen.
A ball rolls horizontally off the edge of a tabletop that is 0.72 m high. It strikes the floor 2.80 m away from the edge of the table. What is the initial (horizontal) velocity of the ball? Ignore
Heat capacity of copper is .092 calories per gram per degree Celsius. Show that the amount of heat needed to raise the temp of a 10-gram piece of copper from 0 degree Celsius to 100 degree Celsius i
An electric dipole is formed from pm 1.0;{rm nC} charges spaced 3.00 mm apart. The dipole is at the origin, oriented along the y-axis. What is the electric field strength at the points
A 29 kg chair initially at rest on a horizontal floor requires a 365 N horizontal force to set it in motion. Once the chair is in motion, a 325 N horizontal force keeps it moving at a constant velo
A 523 kg bear grasping a vertical tree slides down at constant velocity. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on the bear? Answer in units of N.
A 15 g lead bullet is tested by firing it into a fixed block of wood with a mass of 1.05 kg. The block and the embedded bullet together absorb all the heat generated. After thermal equilibrium has
A pendulum has a length L = 1.49 m. It hangs straight down in a jet plane about to take off as shown by the dotted line in the figure. The jet accelerates uniformly, and during that time, the pendu
A spring has a spring constant, k, of 443 N/m. How much must this spring be stretched to store 27 J of potential energy?
Two trains are traveling toward each other at 30.9 m/s relative to the ground. What frequency will be heard if the wind direction is reversed?
The magnitude of a uniform electric field between the two plates is about 2 × 105 N/C. If the distance between these plates is 0.1 cm, find the potential difference between the plates.