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A hoist motor supplied by a 240 V source requires 12 A to lift an 800 kg load at a rate of 9.00 m/min. Determine the power input to the motor
A very tall flagpole, temporarily charged uniformly by lightning, What is the linear density of the charge on the flagpole
Here's a basketball problem: A 80.0 kg basketball player is running in the positive direction at 7.0 m/s. what is the resulting velocity of the 80.0 kg player
A 4.3-m-tall, 50-cm-diameter concrete column supports a 1.0×105{\rm kg} load. By how much is the column compressed
Water (? = 1.00E-3 Pa*s) is flowing through a horizontal pipe with a volume flow rate of 0.0149 m3/s. Calculate the radius of the horizontal pipe
A block of mass M=0.986kg is floating stationary in a beaker of water. A string connected to the bottom of the beaker holds the block in place. find the direction of the buoyant force acting on the b
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. calculate the total cross-sec
A jet of water squirts out horizontally from a hole near the bottom of the tank, What is the height, h, of the water level in the tank
A luminous object is 3.60m from a wall. You are to use a concave mirror to project an image of the object on the wall, How far should the mirror be from the wall
TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, What is the frequency for channel 4
An Earth satellite has a speed of 28100 km/hr when it is at its perigee, 281 km above Earth's surface. Find the apogee distance
A ladder weighs 150 N, is 5m long, and is leaning against a frictionless wall at an angle of 30* with the horizontal. Draw an extended freebody diagram of this situation
A tube is open only at one end. A certain harmonic produced by the tube has a frequency of 470 Hz. What is the length of the tube
A string that is fixed at both ends has a length of 2.68 m. When the string vibrates at a frequency of 83.9 Hz, What is the wavelength of the waves that travel on the string
A rural power line carries 1.7 A rms at 4700 V. A step down transformer reduces this to 235 V rms to supply a house. Find the turns ratio of the transformer
A candle is placed 13.38 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
An electron is accelerated from rest through a potential difference that has a magnitude of 2.90 × 107 V. FIND the relativistic kinetic energy (in joules) of the electron
A plane sinusoidal electromagnetic wave has a magnetic field amplitude of 5.00 x 10^-5 T. What is the electric field amplitude of the wave
In one such test, 150 turns of wire were wrapped around a 7.0-m-diameter cylindrical shark tank. find the magnetic field strength in the center of the tank
A standing observer perceives a train whistle to have a frequency of 300 Hz. compute the frequency of the sound waves emitted from the train
A railroad car of mass 2.46 multiply.gif 104 kg, is moving with a speed of 4.13 m/s. What is the speed of the four cars after the collision
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 2 m and let go. what is the maximum velocity of the mass
A sanding disk with rotational inertia 2.0 multiply.gif 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 8 N·m about the central axis of the disk. compute t
Two very narrow slits are illuminated by monochromatic coherent light in air that has wavelength 560 nm, What is the distance between the two slits
A certain gyroscope consists of uniform disk with a 50 cm radius mounted at the center of an axle that is 11 cm long and of negligible mass. what is the precession rate