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A gamma-ray photon creates an electron-positron pair, each with a kinetic energy of 260 keV.
1. What was the energy of the photon?
2. What was the wavelength of the photon?
Find out the sum of these four vector forces: 12N to the right at 35.0° above the horizontal, 31.0 N to the left at 51.5° above the horizontal, 7.45N to the left at 35.0° below the horizontal, and 24N to the right at 48.0° below the horizontal.
a. the muon is traveling at 0.982 c what is its momentum? the mass of such a muon at rest in the laboratory is known
A car (m = 2,000 kg) has an initial speed of 40 m/s and the driver applies the brakes over a distance of 200 meters until the car comes to a stop
An infinite plane current sheet coincides with the xy plane. The surface current density is K'=K' y-hat where K'=const, Find the force per unit length on the wire
A certain electric extension cord has a resistance of 4.96 ?. Suppose it is replaced by an extension cord made of the same material. What is the resistance of the new cord
If the magnitude of the drift velocity of free electrons in a copper wire is 7.12 10-4 m/s, what is the electric field in the conductor
A 1.0 mm diameter mall bearing has 2.0 x 10^9 excess electrons. What is the ball bearing's potential
a battery has an emf of 15.0 v. the terminal voltage of the battery is 13.1 v when it is delivering 18.0 w of power to
A small immersion heater is rated at 400W. Estimate how long it will take to heat a cup of soup (assume this is 474 mL of water ) from 21.5 C to 62.5 C.
When red light in a vacuum is incident at the Brewster angle on a certain type of glass, the angle of refraction is 29.2°. What is the Brewster angle
A block of weight w = 35.0N sits on a frictionless inclined plane, which makes an angle θ = 29.0° with respect to the horizontal, as shown in the figure. (Figure 1) A force of magnitude F = 17.0N , applied parallel to the incline, is just suff..
A 15.0 g block with a charge of +6.00 10-5 C is placed in an electric field = (3000 - 600 ) N/C. What is the electrostatic force on the block
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