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A sample of helium gas is excited with an electric current, which causes the helium to emit electromagnetic radiation when the helium atoms return to their ground state. You gauge the maximum magnitude of the electric field of the emitted radiation to be 0.0066 V/m. Based on your measurement, what is the maximum magnitude of the magnetic field in the radiation?
A positron is a particle with the same mass and magnitude charge as an electron, but a positron has a positive charge. how fast is the positron moving
Two lenses are placed 30 cm apart. The first lens has a focal length of +20 cm, and the second lens has a focal length of -10cm. If an object is placed 100 cm in front of the first lens, where is the final image located? Give your answer in relation ..
suppose theres a cannon placed at the base of a mountain. we tilt the cannon at a 45-degree angle in the direction of
An incident x-ray photon is scatterted from a free electron that is initailly at rest. What is the magnitude of the electron after its collision
A proton a neutron and an alfa particle accelerated through the same potential difference enter a region of uniform magnetic field moving at right angles to B.(a) Compare their kinetic energies.(b) if the radius of the proton’s circular path is 10 cm..
A ball of mass 0.220 kg that is moving with a speed of 6.3 m/s collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth
How many photons per second are emitted by a monochromatic lightbulb (640 ) that emits 45 of power If you stand 15 from this bulb, how many photons enter each of your eyes per second? Assume your pupil is 5.0 in diameter and that the bulb radiates un..
a 3-kg rock is tied to the end of a string and twirled overhead 1.9 m above the ground in a 0.8-m radius horizontal
In a hydraulic system with a large and a small piston, you wish to lift a 1130 kg car sitting on the large piston that has a diameter of 28.2 cm, What is the diameter of the small piston
Assume that a CCD pixel is a uniformly made cube of silicon. The relation between pixel size and full well capacity is roughly true for real CCDs. Discuss what applications might require a CCD with large pixels and with small pixels.
A ball is thrown straight up in the air at an initial speed of 30 m/s. Using conservation of energy, find the maximum height of the ball
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