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An atom with mass m emits a photon of wavelength A.
(a) What is the recoil speed of the atom?
(b) What is the kinetic energy K of the recoiling atom?
(c) Find the ratio KIE, where E is the energy of the emitted photon. If this ratio is much less than unity, the recoil of the atom can be neglected in the emission process. Is the recoil of the atom more important for small or large atomic masses? For long or short wavelengths
(d) Calculate K (in electron volts) and KIE for a hydrogen atom (mass 1.67 x 10-27 kg) that emits an ultraviolet photon of energy 10.2 e V. Is recoil an important consideration in this emission process?
A mountain climber jumps a 3.0m wide crevasse by leaping horizontally with the speed of 8.00 m/s. If the climber's direction of motion on landing is 45 degrees, what is height difference between the two sides of the crevasse? Where does the climbe..
A cockroach of mass m lies on the rim of a uniform disk of mass 4m that can rotate freely about its center like a merry-go-round. estimate the angular velocity of the cockroach-disk system
Two thin convex lenses, A and B, lens A has a long focal length and lens B has a short focal length. which lens will produce an image at a smaller s'
A woman finds the front windshield of her car covered with iceat -13.8°C. How much heat is required to meltthe ice
Find out the magnitude of the wind velocity. Find the direction of the wind velocity.If the wind velocity is 39 due south, in what direction should the pilot set her course to travel due west? Use the same airspeed of 213 .
A dentist's chair of mass 234.0 kg is supported by a hydraulic lift having a large piston of cross-sectional area 1596.0 cm2. What force must be applied to the small piston
A 1.90 kg ball is attached to the bottom end of a length of fishline with a breaking strength of 10 lb (44.5 N). At what angle (measured from the vertical) will the fishline break
If the backpack begins to slide when the spring ( = 150 ) stretches by 2.40 , what is the coefficient of static friction between backpack and table.
question1analyse the crystal thickness pd df prf prp spl period and distance to reflector if a 3 cycle pulse emitted
You swing a 2.60 stone in a circle, using the full length of a thin 80.0 rope. At what speed should you swing it so its acceleration will be 9.8
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. Determine the current in the rods
The voltage marked on a light bulb is usu- ally either 110 or 120 V. Find the current flowing through the light bulb
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