paresh Ghosh

2. If the wavelength of Deepika’s voice is 2 and that of Ashwaria is 5m respectively in air. Find the frequency of Ashwaria’s voice. Fi the frequency of Deepika’s voice is 750Hz. Which of them has a higher pitch?

4. A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.

10. The velocity of light in a transparent liquid is 1.8X10cm/second, while in vacuum it is 3X10^3cm/second. Find how much the bottom of the vessel containing this liquid appears to be raised if the depth of the liquid is 25cm.

11. If 238U92 emits successively four alpha particles two beta particles, what will be the atomic number and mass number of the final product.