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A long solenoid has a length of 0.76 m and contains 1100 turns of wire. There is a current of 3.2 A in the wire. What is the magnitude of the magnetic field within the solenoid?
What is the frequency (Hz) of an oscillator with a period of 20 seconds? (show how to solve please) how much force is needed to stretch a spring (k=1000 N/m) by 6 cm?
An electron is accelerated by a synchrotron accelerator to an energy of 2GeV. What is its velocity and what is the ratio between its mass after the acceleration and the rest mass?
A certain element has a mass per mole of 54.9380 g/mol. What is the mass of a single atom in (a) atomic mass units and (b) kilograms? (c) How many moles of atoms are in a 258-g sample?
A bug crawls outward from the center of a compact disc spinning at 210 revolutions per minute. The coefficient of static friction between the bug's sticky feet and the disc surface is 1.1 How far do
Bob walks 390m south, then jogs 660m southwest, then walks 390m in a direction 35^\circ east of north. a) find the displacement that will return Bob to his starting point by the most direct route b)
The train didn't exceed the 45 speed limit on this curve. or The train did exceed the 45 speed limit on this curve, thus provoking the derailment.
Measuring the Speed of Light: Michelson In 1926, Albert Michelson measured the speed of light with a technique similar to that used by Fizeau. Michelson used an eight-sided mirror rotating at 528 re
Bill then travels to Antarctica and applies the same voltage to the same wire. What current does he register there if the temperature is -88.0°C? Assume that no change occurs in the wire's shape
What is the time (in seconds) it takes for a 10-µm diameter dust particulate to settle from the ceiling vent to the floor in a classroom that measures 10 meters x 15 meters x 2.5 meters.
Assuming the plant boiler, turbine, and electric generator have energy conversion efficiencies of 88%, 47%, and 99%, respectively, what is the electric energy output (in kWh) for every 1000 pounds o
A coal-fired electric power plant has a 2,000-megawatt electric power output and operates with an overall plant efficiency of 33%. This means energy is being derived from coal at a rate of 6,000 meg
Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b) accelerating upward with an acceleration whose magnitude is 1.83 m/s2, and (c) accelerating downw
A length of metal wire has a radius of 5.10 x 10-3 m and a resistance of 0.100 . When the potential difference across the wire is 15.0 V, the electron drift speed is found to be 3.17 x 10-4 m/s. On
(a) What is the ship's kinetic energy at this time? (b) How much work is required to stop it? (Include the sign of this value.) (c) What is the magnitude of the constant force required to stop it as
On June 14, 2005, Asafa Powell of Jamaica set a world's record for the 100-m dash with a time t = 9.77 s. Assuming he reached his maximum speed in 3 s, and then maintained that speed until the finis
If a speed of 40 is required for takeoff, what minimum length of runway is needed? Express your answer using two significant figures.
A projectile returns to its original height after 4.08 seconds, during which time it travels 76.2 meters horizontally. Determine what was the projectile's initial speed? (Use g = 9.80 m/s2)
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 4 liters of water? (A liter is 1.00 10-3 m3) electrons (b) What is the ne
When the door is open and at rest, the door closer exerts a torque of 5.7 N*m. What is moment of inertia of the door in (kg*m^2)? and If you let go of the door what is its angular acceleration immed
Calculate the de Broglie wavelength of a 4.7 MeV ? particle emitted from an atomic nucleus whose diameter is approximately 1.4 multiplied by 10-14 m. Calculate its minimum kinetic energy according t
Twenty moles of a monatomic ideal gas (r = 5/3) undergo an adiabatic process. The initial pressure is 400 kPa and the initial temperature is 450 K. The final temperature of the gas is 320 K. What is
A 30uF capacitor initially charged to 20uF is discharged through a 2.2kohms resistor. How long does it take to reduce the capacitor's charge to 8.0uC ?
(a) What is the magnetic moment of the loop, and (b) what is the magnitude of the net torque exerted on the loop by the magnetic field?
A wire has a length of 7.05 × 10-2 m and is used to make a circular coil of one turn. There is a current of 5.47 A in the wire. In the presence of a 2.74-T magnetic field, what is the maximum