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The nuclear reaction that powers the sun is the fusion of four protons into a helium nucleus. The process involves several steps, but the net reaction is simply 4p?4He+energy. The mass of a helium nucleus is known to be 6.64×10?27kg.
a) How much energy is released in each fusion? (Solution found)
b) What fraction of the initial rest mass energy is this energy? (%)
What would be the equilibrium temperature when a 270 g block of copper at 300°C is placed in a 150 g aluminum calorimeter cup containing 820 g of water at 12.0°C.
An ac series circuit has an impedance of 178 ? , and the phase angle between the current and the voltage of the generator is ? = -74°, find the capacitive reactance XC or the inductive reactance XL, whichever is appropriate
Estimate the position of C.G or fulcrum & the masses of persons on a 16 feett sea saw, under balanced condition.
A moving body undergoes uniform acceleration while travelling in a straight line between points X, Y and Z. The distances XY and YZ are both 40m. The time to travel from X to Y is 12s and from Y to Z is 6s.
one end of a uniform beam of 222N is hinged to a wall, the other end is supported by a wire that makes angles of 30 with both wall and beam, find out the tension in the wire and horizontal and vertical componentes of the force od the hinge on the ..
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.350mm wide. The diffraction pattern is observed on a screen 3m away.
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. 1-Find the volume of the cylinder. 2-Calculate the probable percent error in the length. 3-Calculate the probable percent..
Rotates a 1.00 kg discus along a circular path of radius 1.04 m. The maximum speed of the discus is 17.0 m/s. Find out the magnitude of the maximum radial acceleration of the discus.
small metal bead, labeled A, has a charge of 26 . It is touched to metal bead B, initially neutral, then that the two beads share the 26 charge, but not required equally. When the two beads are then placed 5.0 apart, force between them is 5.4×10-..
Use the blackbody radiation law to estimate the wavelength of maximum intensity for the light from the sun's photoshere
What is magnitude of the current
Two ambulances move toward each other on a straight road. Each travels at a speed of 65 mph. The siren on each ambulance produces a sound wave of frequency 460 Hz. (Take the speed of sound in air to be 340 m/s.)
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