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a body push a block of 3 kg with 2.5 acceleration then force will be ?
The β− particles emitted in the decay of 3 H (tritium) interact with matter to create light in a glow-in-the-dark exit sign. At the time of manufacture, such a sign contains 15.0 Ci of 3 H . (a) What is the mass of the tritium? (b) What is its activity 5.00 y after manufacture?
A radioactive sample initially contains 2.40 × 10−2 mol of a radioactive material whose half-life is 6.00 h. How many moles of the radioactive material remain after 6.00 h? After 12.0 h? After 36.0 h?
Show that: T=I/Y
Find the length of a side of a cube having a mass of 3.2 kg and the density of nuclear matter.
The mass (M) and the radius (r) of a nucleus can be expressed in terms of the mass number, A. (a) Show that the density of a nucleus is independent of A. (b) Calculate the density of a gold (Au) nucleus. Compare your answer to that for iron (Fe).
What characteristics of radioactivity show it to be nuclear in origin and not atomic?
For the carbon dating described in this chapter, what important assumption is made about the time variation in the intensity of cosmic rays?
What are isotopes? Why do isotopes of the same atom share the same chemical properties?
why torque=μNr. explain briefly.
