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a. A certain radioactive material emits gamma rays with energy 1 MeV. Another sample of radioactive material emits gamma rays with energy 10 keV. If both of these emit the same amount of energy per unit time, compare their activities.
b. A source of 198Au with a half-life of 2.69 days has an initial activity of 5 Ci. Calculate the activity after 4.0 days. Express this activity in Bq.
Explain Simple Pendulum Simple Pendulum : The A point mass suspended by a weight less and inextensible string to a friction less support is known as a Simple pendulum.
Whatn is Fusion
Friction has several disadvantages but life is impossible without friction because friction has many benefits also.
Derive expression for total power consumed when three appliances of power p1 p2 nd p3 are connected in series.
formulas about force in detail
A particle of mass , initially moving with a speed v, collides head on ELASTICALLY with an identical particle initially at rest. a. Do you expect the total mass of the particles
Mass of the system is same. since, p=mv momentum remains same
What do you mean by a junction diode. Illustrate the formation of depletion layer at the junction. Describe the variation of depletion layer in forward and reverse biased condition
For germanium the forbidden gap is (A) 0.15ev. (B) 0.25ev. (C) 0.5ev. (D) 0.7ev. Ans: For germanium the forbidden gap is 0.7ev.
Magnetic Flux And Flux Density A magnetising force produces a certain amount of magnetic flux ( F), measured in Webers. The magnetic field is represented by imaginary lines
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