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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.
What is the speed and momentum of a proton with kinetic energy 500 MeV, What is the de Broglie wavelengeth of the proton
An artillery shell is fired with a minimal velocity of 470m/s at 50o above the horizontal. To clear an avalanche, it explodes on a mountain side 38 s after firing.
A person pushes with a force of 10.0 N on a stick pin to try to push it into a bulletin board. find the average pressure (in Pascals) on the board at the tip of the pin
what is the kinetic energy of the system. assume the roller coaster in Fig. 6-41 (h1 = 36 m, h2 = 14 m, h3 = 25) passes point 1 with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it ..
A 12.6 V battery is in a circuit with a 30.0 mH inductor and a 0.150 resistor, as in Active Figure 20.27. The switch is closed at t = 0. Find the current after one time constant has elapsed
If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters)
Suppose you have a 9.00 V battery, a 2 ?F capacitor, and a 7.25 ?F capacitor. Find the charge if the capacitors are connected to the batt
A 23.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 33.0° with the vertical, find the child's speed at the lowest position
The work done by an engine equals one-half the energy it expels to a cooler at 0C. what is the temperature of the heater
A thin, uniformly charged spherical shell has a potential of 638 V on its surface. Outside the sphere, at a radial distance of 16.0 cm from this surface, Calculate the radius of the sphere
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.700 ?, What will be the length of the wire in µm
The barricade at the end of subway line has a large spring designed to compress 2.00 m when stopping a 1.00 x 10^5 kg train moving at 0,500 m/s. What speed would the train be going if it only compressed the spring 0.500 m?
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