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A gamma-ray photon produces an electron and a positron, each with a kinetic energy of 259keV. h=6.626×10?34J?s, c=2.998×108m/s, me=9.109×10?31kg, e=1.602×10?19C.
Determine the energy of the photon.
Determine the wavelength of the photon.
At what angle should the road be banked. The charge on the inner shell is 4.59 x 10- 8 C and that on the outer shell is 2.15 x 10- 8 C. Find out the electric field (in N/C) (a) at r = 12.7 cm and (b) at r = 37.3 cm.
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. The mass of the Earth is 5.97×1024 kg, the radius of the Earth is 6.38×106 m, and the time of rotation for the Earth is 24.0 hrs.
A rat with an emissivity of .40, total area of .15m^2 and a temperature of 37C. How much energy must the rat's body generate to maintain a skin surface of 37C in a 24 hour period
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 3.60 × 1013 kg.m/s. Find the relativistic momentum of the spacecraft
A wall is composed of two materials, material 1 has a thickness of 3.68 cm and a thermal conductivity of 0.1 J/msCo while material two has a thickness of 6.02 cm, what is the energy loss per second to the nearest watt
The wind exerts a force of 325N north on a sailboat, while the water exerts a force of 425 N west on the sailboat. Find out the magnitude and direction of the net force on sailboat.
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
if the barge can only be pushed 20-cm deeper into the water before water overflows to sink it, how various 400-kg horses can it carry.
How many 111 W lightbulbs can you use in a 107 V circuit without tripping a 16 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 107 V.)
Helium gas with a volume of 2.55L , under a pressure of 1.26atm and at a temperature of 44.0?C, How many grams of helium are there? The molar mass of helium is 4.00g/mol
Find the force to keep object moving.
A rectangular copper strip 1.5 cm wide, 0.1 cm thick carries a current of 5 A. A 1.2 T magnetic field is applied perpendicularly to the strip. Find the Hall voltage that should be produced
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