Physics
(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]
Related Questions
To study the age of excavated material of archaeological significance we study the rate of decay of an isotope of :
- Uranium
- Cobalt
- Carbon
- Chlorine
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?
In the below circuit diagram, calculate:
(a) the external resistance of the circuit.
(b) the current I2.
(c) the current I.
Three wires with proper colour coding are connected to the three terminals of a three-pin socket. Match the colour of the wire with the proper terminals A, B and C of the socket.
(a) Brown
(b) Green
(c) Light blue