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A laser emits 7.50 × 1017 photons per second in a beam of light that has a diameter of 1.89 mm and a wavelength of 514.5 nm. Determine
(a) the average electric field strength and
(b) the average magnetic field strength for the electromagnetic wave that constitutes the beam.
A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m °C. what is the rate of heat flow through the comforter
What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light
A block of unknown mass is attached to a spring of spring constant 6.5 N/m and undergoes simple harmonic motion with an amplitude of 10 cm. Calculate the maximum acceleration of the block
Your expression should give 3.0 m/s for and your answer to part A for theta. Express your answer in terms of theta. Sketch a graph of v versus theta for one complete revolution.
A lead block is suspended from the underside of a 0.5 kg block of wood of density of 728 kg/m3. what is the mass of the lead block
The head of a grass string trimmer has 100 g of cord wound in a light cylindrical spool with inside diameter 3.00 cm, What average power is delivered to the head by the trimmer motor while it is accelerating
A commuter train blows its horn as it passes a passenger platform at a constant speed of 60.0 m/s. What is the frequency observed by a person on the platform as the train approaches
A position vector in the first quadrant has an x component of 8 m and a magnitude of 10 m. What is the value of its y component?
A proton is released from rest at the positive plate of a parallel-plate capacitor, What will be the proton's final speed if the experiment is repeated with double the amount of charge in each capacitor plate
Three uniform thin rods, each of length L = 19 cm, form an inverted U. The vertical rods each have a mass of 12 g; the horizontal rod has a mass of 44 g. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass.
In a wire with a 1.67-mm2 cross-sectional area, 8.43 × 1020 electrons flow past any point during 3.87 s. What is the current in the wire
Type your question here Working on a bikeup side down, you spin the 70 cm wheel and you notice a pebble stuck in the threads goes by three times every second. What is the pebbles speed
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