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A 2.0 kg tumor is being irradiated by a radioactive source. The tumor receives an absorbed dose of 12 Gy in a time of880 s. Each disintegration of the radioactive source produces a particle that enters the tumor and delivers an energy of 0.40 MeV. What is the activity N//t of the radioactive source?
singularity: The center of a black hole, where the curvature of spacetime is maximum. At the singularity, the gravitational tides diverge; no solid object can even theoretical
An object moving with a speed better than the speed of sound is called to be move with a supersonic speed.
As a longitudinal wave moves through a medium, the particles of the medium: a) vibrate in a path parallel to the path of the wave b) vibrate in a path perpendicular to the p
Does CPH mass increase? Answer; Never, mass of CPH is constant, as like its speed.
Explain Conservation of Angular Momentum When a body rotates (spins like a top) or revolves (moves in a circle around a central point), all of the rules that we have used to ca
Evaluate how many electrons flow through a wire when 1A current passes for 1 millisecond? Write two basic differences between p.d. and emf.
Three small snails are each at a vertex of an equilateral triangle of side 60 cm. The ?rst sets out towards the second, the second towards the third and the third towards the ?rst,
What is waveguide dispersion in optical fibres? Waveguide dispersion (Δτ w ): Waveguide dispersion occurs because of the dependence onto the velocity of propagation of every
If the refractive index of a medium is 1.5, determine the critical angle. Write the difference between telescope and microscope.
An a.c. voltage E = E 0 sin cot is applied across an inductor L. Get an expression for current I. Draw a labelled diagram of Van de Graff generator. Verify its principle of wor
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