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Assume that a 7.0 cm diameter, 120 W light bulb radiates all its energy as a single wavelength of visible light.
A. Estimate the electric field strength at the surface of the bulb.
B. Estimate the magnetic field strength at the surface of the bulb.
A projectile is launched vertically from the surface of the earth with an initial speed of 7.00 km/s. At what height (km) will it stop and begin to fall back to the surface of the earth
A 0.080 T magnetic field is perpendicular to a circular loop of wire with 100 turns and radius 30cm. what is the magnitude of the induced emf
An old-fashioned vinyl record rotates on a turntable at 49rpm . What are the angular speed in rad/s and the period of the motion
an electric current of 1.00 A is flowing through a copper filament diameter 1.00 mm, calculate the average electron velocity v and the ?- factor, the positive and negative charge densities in the S' frame
A 5 kg toy race car can move along an x axis. It gives Fx of the force acting on the car, that begins at rest at time t = 0. (The vertical axis is marked in increments of 2.5 N.) what is the momentum at t=6?
A parallel-plate capacitor is charged to an electric potential of 337 V by moving 3.88E+16 electrons from one plate to the other
A 105 granite cube slides down a 40 frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 265 steel cube at rest. How high above the table must the granite cube be released to give the steel cube a speed of..
An 79 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2 shortly after opening the parachute. What upward force is exerted on the open parachute by the air
plan a picutre showing Mary's displacment due to rowing, her displacemnet due to the river's motion, and her net displacement.
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
A force vector has a magnitude of 594 newtons and points at an angle 37o of below the positive x axis. What are (1) the x scalar component and (2) the y scalar component of the vector.
The dielectric in a capacitor serves two purposes. It increased the capacitance, compared to an otherwise identical capacitor with an air gap, What is the maximum energy that can be stored if the plates are separated by a 0.50-mm-thick Teflon sheet
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