Physics
The ore of Uranium found in nature contains and . Although both the isotopes are fissionable, it is found out experimentally that one of the two isotopes is more easily fissionable. (i) Name the isotope of Uranium which is easily fissionable. (ii) Give a reason for your answer. (iii) Write a nuclear reaction when Uranium 238 emits an alpha particle to form a Thorium (Th) nucleus.
Related Questions
(i) State two differences between "Heat Capacity" and "Specific Heat Capacity".
(ii) Give a mathematical relation between Heat Capacity and Specific Heat Capacity.
The temperature of 170 g of water at 50°C is lowered to 5°C by adding a certain amount of ice to it. Find the mass of ice added.
Given: Specific heat capacity of water = 4200 J kg-1 ⁰C-1 and Specific latent heat of ice = 336000 J kg-1
The diagram shows a coil wound around a U shape soft iron bar AB.
(i) What is the polarity induced at the ends A and B when the switch is pressed?
(ii) Suggest one way to strengthen the magnetic field in the electromagnet.
(iii) What will be the polarities at A & B if the direction of current is reversed in the circuit?
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown in the diagram. The arrows show the path of the radiation A, B and C. Answer the following question in terms of A, B and C.
(i) Name the radiation B which is unaffected by the electrostatic field.
(ii) Why does the radiation C deflect more than A?
(iii) Which among the three causes the least biological damage externally.
(iv) Name the radiation which is used in carbon dating.