Atomic and Nuclear Physics Answers

 A householder is worried about the radiation emitted by the granite worktop in his kitchen.

1 kg of granite has an activity of 1250 Bq. The kitchen worktop has a mass of 180 kg.

Calculate the activity of the kitchen worktop in Bq.

A Juniper wood log with a weight density of about 35 pounds/ft³ and a volume of 2 ft³ is submerged in water. What is the buoyant force on it? 

[The weight density of water is 62.4lb/ft³.]

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How much heat is needed to raise 1 kg of aluminum from 10 C to 80 C

Explain What formula you have used to determine the charge to mass ratio of the electron and what is

the origin of it?

Explain Why do we calculate the e/m ratio of an electron?

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.

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?