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What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 5.38 m/s when going down a slope for 4.73 s
Calculate the magnitude and direction of the magnetic field produced by the moving belt at a point just above its surface.
An airplane needs to reach a velocity of 446 km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight?
The trajectories of protons are controlled by bending magnets that produce a magnetic field of 4.80 T. What is the magnetic-field energy in a 10.0 cm^3 volume of space where B= 4.80 T?
A particular organ pipe can resonate at 213 hz, 355 hz, and 497 hz, but not at any other frequencies in between. What is the fundamental frequency of this pipe?
Determine the magnitude of the electric field at the surface of a lead-198 nucleus, which contains 82 protons and 116 neutrons. Assume the lead nucleus has a volume 198 times that of one proton and
A 74.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place?
Using Ampere's law, find an expression for the magnetic field strength between two circular parallel conducting plates that are forming a capacitor.
A child slides down a slide with a 28degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Calculate the coefficient of sliding
The plates are separated by 6.00 cm. If the thread makes an angle of 17.0° with the vertical, what is the potential difference between the plates?
A small, 300 cart is moving at 1.40 on an air track when it collides with a larger, 3.00 cart at rest. After the collision, the small cart recoils at 0.890. What is the speed of the large cart afte
Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. The frequency of the most energetic bursts has been measured at around 3.0x10^21hz what is the wave
If they broadcast 3.6 cm microwaves, what minimum receiving-dish diameter is needed to resolve (by Rayleigh's criterion) the two transmissions?
The resistor in an RC circuit has a resistance of 150 Omega. (a) What capacitance must be used in this circuit if the time constant is to be 3.7 ms?
A very powerful vacuum cleaner has a hose 2.86 cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick it can lift? (b) A very powerful octopus uses one sucker, of diame
What is the tension in (a) the nearer (relative to the person) cable and (b) the farther (relative to the person) cable?
Find the work for an isothermal expansion of 3.50 mol of an ideal gas at temperature of 19oC from pi = 5.43 atm to pf = 2.74 atm.
You walk at an angle of θ = 73.0° toward a plane mirror, as in the drawing. Your walking velocity has a magnitude of 0.95 m/s. What is the velocity of your image relative to you (magnitud
Creates a net field with the same strength and dip angle (60 below horizontal) as the earth's field but with a horizontal component that points south rather than north.
A block of wood has specific gravity 0.80. When placed in water, what percent of the volume of the wood is above the surface? a. 0, the block sinks. b. 20% c. 25% d. 80%
Suppose the stationary observer sounds a horn that is identical to the one on the train. What frequency is heard from this horn by a passenger in the train?
A 35.0-kg child swings in a swing supported by two chains, each 2.90 m long. The tension in each chain at the lowest point is 352 N. Find the child's speed at the lowest point.
A magnetic field of magnitude 1.6 T is pointing in the positive y-direction. What will be the y-coordinate of the proton 12mus later?
Assuming the magnets behave as ideal dipoles, what is the distance between their centers?
Water flowing through a garden hose of diameter 2.73 cm fills a 20.0 L bucket in 1.40 min. What is the speed of the water leaving the end of the hose?