According to the Bohr model of the atom, an element in the ground state radiates

Question

According to the Bohr model of the atom, an element in the ground state radiates electromagnetic energy continuously emits only spectral lines remain there forever can jump to another orbit if given enough energy A hydrogen atom is said to be in its ground state when its electron is at rest is in the lowest energy level is inside the nucleus has escaped from the atom An atom emits a photon when one of its orbital electrons jumps from a lower to a higher energy level jumps from a higher to a lower energy level is removed by the photoelectric effect is struck by an X-ray Light of wavelength 5 times 10^-7 m consists of photons whose energy is 1.1 times 10^-45 J 1.3 times 10^-27 J 4 times 10^-19 J 1.7 times 10^-15 J The frequency of an X-ray photon which has an energy of 6.6 times 10^-15 J is 4.4 times 10^-48 Hz 10^-19 Hz 10^15 Hz 10^19 Hz The de Broglie wavelength of an electron whose speed is 10^8 m/s is 5.9 times 10^-56 m 1.5 times 10^-19 m 7.3 times 10^-42 m 1.4 times 10^11 m The speed of an electron whose de Broglie wavelength is 10^-10m is 6.6 times 10^-24 m/s 3.8 times 10^3 m/s 10^10 m/s 7.3 times 10^6 m/s The fluid at the top of a container is under less pressure than the fluid at the bottom under the same pressure as the fluid at the bottom under more pressure than the fluid at the bottom any of these, depending upon the circumstances A cake of soap placed in a bathtub of water sinks. The buoyant force o the soap is less than its weight is equal to its weight is 0 is more than its weight A 20-kg piston rests on a sample of a gas in a cylinder whose cross-sectional area is 15m^2. The pressure the piston exerts on the gas is 0.13 Pa 1.3 Pa 13 Pa 7.5 Pa

Explanation / Answer

I am again marking all the correct answers

41 D

42 B

43 D

44 C

45 E = hv

6.67*E-15 = 6.67E-34 *V

V = E19

49 A. as the buoyant force is less than the weight the soap sinks

50 C

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