15. सिम्ररनको तौल पृथ्विको सहतमा 600N छ भने उनको तौल 300N हुनको लागि I (R= 64 x 105m) (If Simran's weight is 600N on the earth. How far should she be from the centre of
the earth so that his weight will be 300N? (Radins of earth is
64 x 105m)​

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?