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A 2.71 g sample of KCl from the chemistry stockroom is found to be radioactive, and it is decaying at a constant rate of 4490 Bq. The decays are traced to the element potassium and in particular to the isotope 40K, which constitutes 1.17 % of normal potassium. Calculate the half-life of this nuclide?
A 115 V electric iron draws 5.57 A of current. How much heat is developed per hour, What is the temperature of the bath
A farsighted person uses glasses with a refractive power of 3.6 diopters. What is this person's near point when not wearing glasses
iron atoms have been detected in the sun's outer atmosphere, some with many of their electrons stripped away. What is the net electric charge(in coulombs) of an iron atom with 26 protons and 7 electrons? Be sure to include the algebraic sign (+ or..
The lengths of the three telescopes are LA = 434 mm, LB = 653 mm, Find the angular magnification of each telescope
A spherical shell of radius R = 8.0 cm has a total charge Q = - 900nC uniformly distributed on its surface, Write the net electric field at the point P in unit vector notation
Two equal volumes designated 1 and 2, each of which contains a quantity of a classical monatomic gas at the same temperature, establish a relationship between the chemical potentials µ1 and µ2
Protons in cosmic rays have been observed with kinetic energies as large 2.70 × 108 eV. How fast are these protons moving
Assume the mass density of Earth from the center to r= R_cm (radius of the core mantle boundary) is d_cm and from R_cm until the surface r=R_e the density is d_e. Using these densities, determine the gravitational potential energy of the Earth
A charged particle A exerts a force of 2.75 ?N to the right on charged particle B when the particles are 12.0 mm apart. Particle B moves straight away from A to make the distance between them 17.6 mm. What vector force does particle B then exert o..
Three concentric, thin, long conducting cylindrical shells have radii of 3.00 mm, 5.00 mm, and 6.00 mm, Find the capacitance per unit length of this configuration
An object with a charge of 0.980 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
A parallel-plate capacitor in air has a plate separation of 1.35 cm and a plate area of 25.0 cm2. Determine the charge on the plates before and after immersion
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