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When describing a black hole evaporation in the hawking black body radiation it is usually said that is due to a virtual photon pair, is it this what happens? And what is virtual photon pair, does the photon has anti particle or it is its own ? I am not looking for a deep theory, just the general picture.
An object with a mass of 33.0 g displaces 870.0 ml of water when it is completely immersed. What is the buoyant force on the mass? (Use g=9.8 N/kg as necessary.)
Determine the resultant velocity of an airplane that normally flies at 200 k/h if it encounters a 50 km/m tailwind if it encounters a 50 km/h headwind
q1. what is the width of a slit for which the distance between two first order minima is 1 cm? the slit is illuminated
The car in the drawing is moving to the left at 35 m/s. The car's horn continuously emits a 2.20 × 102 Hz sound. What is the wavelength of the sound in the direction of motion of the car
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
In a physics lab, light with a wavelength of 560nm travels in air from a laser to a photocell in a time of 17.3ns. What is the wavelength of the light in the glass
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.950 diopters. How far is her near point from her eyes
Calculate momenta before collision of the objects with masses m1=10g and m2=20g, moving with speeds v1=2m/s and v2=7m/s
question1calculate approximately the average power of a water wave when it hits chest of an adult standing in the water
Two electrons in the same atom both have n = 4 and script i = 2. How many quantum numbers are there for the possible states of the atom? How many states would be possible if the exclusion principle did not apply to the atom?
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 473 m/s
The tire on a bicycle is filled with air to a gauge pressure of 691 kPa at 20?C. What is the gauge pressure in the tire after a ride on a hot day when the tire air temperature is 48?C?
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