Two substances A and B have their relative permeabilities slightly greater and less than unity respectively. What do you conclude about A and B?

Solve the following problems : Two substances A and B have specific heats c and 2c respectively . If A and B are given Q and 4Q amounts of heat respectively , the change in their temperatures is the same . If the mass of A is m , what is the mass of B ?

Two engines A and B have their sources at 400 K and 350 K and sinks at 350 K and 300 K respectively. Which is more efficient and by how much ?

Two bodies A and B having same surface areas have emmissivities of 0.01 and 0.49 respectively. The two bodies emit total radiant power at the same rate. The wavelength A8 corresponding to maximum spectral radiancy 111 the radiation from B shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1 µm. Jf temperature of A is 5200 K then,

A student performed following two activities in school laboratory: Activity 1: Addition of zinc dust into copper sulphate solution taken in a test tube. Activity 2: Addition of an iron nail into copper sulphate solution taken in a test tube. He noted down his observations and concluded that chemical reaction occurs in both the cases based on the observed colour change of the resulting solution. Based on these activities, what can you conclude about the reactivity of elements zinc and iron as compared to that of copper?

Sets A and B have 3 and 6 elaments respectively. What can be theminimum number of elements in A uu B

Helium gas is filled in two identical bottles A and B. The mass of the gas in the two bottles is 10 gm and 40 gm respectively. If the speed of sound is the same in both bottles, what conclusions will you draw?

Helium gas is filled in two identical bottles A and B. The mass of the gas in the two boules is 15 g and 90 g respectively. If the speed of sound is the same in both bottles, what conclusions will you draw?

Two satellites A and B go round a planet in circular orbits having radii 4R and R, respectively. If the speed of satellite A is 3v, then speed of satellite B is