The relative density of gold is 19.3 it means the ratio obtained by dividing the density of gold by water at temp of 4 degree celcius is 19.3
Wave-particle duality, Light consist of particles and waves. With light as particles, If we have a double slit and you send particles throuh the slit one by one, you will see single particles appearing on the screen, they are random but as time goes, they form a wave-like pattern where there are brighter columns and dimmer columns.
Frequency decreases whilst wavelength increases and the opposite also occurs
Answer:
Equivalent Resistance of Resistors in Parallel is
1/R = 1/r1 + 1/r2 .....
1/R = 1/7 + 1/7 + 1/7
R= 7/3
R=2.33ohms