Physics
To study the age of excavated material of archaeological significance we study the rate of decay of an isotope of :
- Uranium
- Cobalt
- Carbon
- Chlorine
Related Questions
Water is used in car radiators because :
- it is a good conductor of heat.
- it conducts heat faster as compared to the other substances and cools the engine quickly.
- its specific heat capacity is very low.
- its specific heat capacity is very high so it can cool the engine without a greater increase in its own temperature.
The heaviest nuclear radiation is :
- x-radiation
- α-radiation
- γ-radiation
- β−radiation
The diagram below shows a magnetic compass kept closer to a coil AB wound around a hollow cylindrical cardboard :
(a) After studying the circuit and the magnetic compass carefully, state whether the switch S1 is open or closed.
(b) How did you arrive at the conclusion in (a)?
(c) What is the purpose of placing the magnetic compass in the above setup?
(a) Give an important reason for copper to be used as a material for a calorimeter.
(b) Calculate the thermal capacity of 40 g of water.
[Specific heat capacity of water = 4200 JKg-1°C-1]