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Gamma rays (γ-rays) are high-energy photons. In a certain nuclear reaction, a γ-ray of energy 0.788 MeV (million electronvolts) is produced. Compute the frequency of such a photon.
one cue your hearing system uses to localize a sound is the slight difference in the arrival times of the sound at year ears. what is the difference in arrival times
In which case is it more likely that we may neglect non-ohmic effects due to the heating of the circuit by the current: in a series or parallel circuit? Why?
Determine the percent mass flow of steam extracted from the turbine.- The turbine power output per unit mass flow of steam.
a ball is thrown straight up takes 2.25s to reach a hieght of36.8m, how much higher will the ball go
A 12.0-g sample of carbon from living matter decays at the rate of 177.5decays/minute due to the radioactive 14C in it. What will be the decay rate of this sample in 1000 years
Jason is practicing his tennis stroke by hitting balls against a wall. The ball leaves his racquet at a height of 60 cm above the ground at an angle of 80' with respect to the vertical. Is ball on its way-up or down when the ball strikes the wall?
An artillery shell was fired at a 60 degree elevation on the top of a 150 m hill. The muzzle velocity of the shell was 275 m/s. Find the maximum height of the object
A sodium atom (Z = 11) contains 11 protons in its nucleus. Strictly speaking, the Bohr model does not apply, as the neutral atom contains 11 electrons instead of a single electron. but, we can apply the model to the outermost electron as an approxima..
In outer space, a constant net force of magnitude 145N is exerted on a 31.4kg probe initially at rest. What acceleration does this force produce
A person's face is 30cm ini front of a concave shaving mirror. If the image is an erect image 1.5 times as large as the object, what is the mirror's focal length?
The mass of a bottom quark is 4.20Gev/c^2 and was found by colliding a beam of protons with a cloud of stationary protons. How fast were they moving
When a battery is connected to a 89.0-? resistor, the current is 3.91 A. When the same battery is connected to a 417.0-? resistor, the current is 0.848 A. Find the emf supplied by the battery
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