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a cyclist comes to a stop from a velocity of 15 m/s the acceleration is -3m/s squared by 2 how far does the bicycle travel while it is braking


7: find wavenumber, wavelength and frequency of Ha line of Hydrogen, assuming that the nucleus has infinite mass. Calculate the wavelength of the Balmer series limit.


Give the answer of this question if red line of cadmium splits into 3 components separated by 120MHz if the source is 

placed in magnetic field of flux density 8.6mT, the light being examined in a direction perpendicular 

to the magnetic field. Find the ratio of charge to mass (e/m) of the electron.


What is neutrino hypothesis? What is the need and significance of this hypothesis?


When an evacuated container whose volume is 600 mL is filled with O2 gas at 40°C and 900 mmHg, the mass of the container will increase by …………………g 


A family living in a villa consumes about 25 MWh of energy per year. We imagine that this energy could be produced in a fusion power plant that uses the nuclear reaction H + H -> He + n, where H stands for deuterium, He for helium-3 and n for neutron. We also assume that the efficiency of the fusion power plant is 30%. How many grams of deuterium are needed each year to produce energy for this family?

a container contains neon at 27 degrees Celsius. its temperature rises to 243 krad celsius .find the change in kinetic energy of neon atoms


(32_15P) is a beta-emitter with a decay constant of 5.6 x 10^-7 s^-1. 3.8g of (32_15P) is injected into a plant to serve as a tracer. Calculate the initial activity of the tracer.
Explain what is mearnt by the activity of a radioactive
When gamma rays are incident on matter, the intensity of the gamma rays passing through the material varies with depth x as I(x) = Ioe^(-ux) , where Io is the intensity of the radiation at the surface of the material (at x = 0) and u is the linear absorption coefficient. For 0.400 MeV gamma rays in lead, the linear absorption coefficient is 1.59cm^-1 .
(a) Determine the "half-thickness" for lead, that is, the thickness of lead that would absorb half the incident gamma rays.
(b) What thickness reduces the radiation by a factor of 10^4?
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