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(a) Calculate the lowest energy of the electron in He+. Is it lower than that of H?
(b) If this electron absorbs a photon and makes a transition to the 2p orbital, what is the frequency of the absorbed photon?
A Carnot engine is operated between two heat reservoirs at temperatures of 530K and 300K. What is the thermal efficiency of the engine
A cable supports a uniformly distributed load. The max tension that the cable can withstand is 41 x 10^6 N. What min length of cable is needed
An Automobile engine slows down from 4500 rpm to 1200 rpm in 2.50 s. Calculate (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
Find the velocity of each object after the collision.he encountered cold weather conditions on the way to Payson, Utah when the temperature was 23 kelvin lower than in Las Vegas, where he delivered his entire load. how much liters did he deliver.
A 4.00kg block slides down a frictionless inclined plane with an acceleration 3.00,/s^2. What is the angle of the incline above the horizontal
Ice at -13.7 °C and steam at 114 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 43.3 °C is present. Ignoring container and equilibrium vapour pressure of t..
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
Three equal charges are placed at the corners of an equilateral triangle 0.50 m on a side. What are the magnitude of the force on each charge if the charges are each -4.5×10^-9 C?
Reflecting telescopes make use of a concave mirror, in place of the objective lens, to bring the distant object into focus. What is the magnifying power of a telescope
A horizontal wire of length 0.58 m, carrying a current of 7.2 A, is placed in a uniform external magnetic field, Determine the magnitude of the external magnetic field
A flight attendant pulls her 70.0N flight bag a distance of 244 m along a level airport floor at a constant speed. The force she exerts is 36N at an angle of 52° above the horizontal. Find the work she does on the flight bag.
A step-down transformer has a turns ratio of 1:10, and its primary is connected across the terminals of a standard 120-V wall socket
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