Physics Vectors Level: Misc Level
a) If Vx=19.40 units and Vy=-15.80 units, determine the magnitude of V.
b) Determine the angle of V with respect to the x-axis.
Physics Properties Of Matter Level: Misc Level
A bee of mass 1g lands on the end of a horizontal twig, which starts to oscillate up and down with a period of 1 s. Treat the twig as a massless spring, and estimate its force constant.
Physics Modern Physics Level: Misc Level
A hydrogen atom, treated as a point mass, is confined to an infinite one diamensional square well of width 1.0 nm.How much energy does it have to give up to fall from the level with n=2 to the lowest energy level?
Physics Modern Physics Level: Misc Level
Calculate the minimum uncertainty in the speed of a ball of mass 500g that is known to be within 5 um of a certain point on a bat.
Physics Modern Physics Level: Misc Level
The speed of a certain proton is 350 km/s. If the uncertainty in its momentum is 0.0100 percent, what 7 unceertainty in its location must be tolerated?
Physics Modern Physics Level: Misc Level
The energy required for the ionization of a certain atom is 3.44 aJ (1 aJ==10 to the(-) 18 th J: a denotes atto) The absorption of a photon of unknown wavelength ionizes the atom and ejects an electron with veiocity 1.03x10 to the 6 th m/s. Calculate the wavelength of the incident radiation.
Physics Modern Physics Level: Misc Level
Calculate the linear momentum of photons of wavelength a) 725 nm b)75 pm c) 20 m 2x3 =6.
Physics Modern Physics Level: Misc Level
Calculate the de Broglie wavelength of a) a mass of 1.0 g traveling at 1.0 m/s b) the same traveling at 1.00x10 to the 5 th km/s c)a helium atom traveling at 1000 m/s (a typical speed at room temperature)3x3=9
Physics Work,Power & Energy Level: Misc Level
The work function for metallic caesium is 2.14 eV. Calculate the kinetic energy and the speed of the 4+4=8 electrons ejected by light of wavength a) 750 nm, b)250 nm
Physics Relativity Level: Misc Level
If your twin is riding in a spaceship going one-fifth the speed of light (v=C/5), how much has he aged after you've aged exactly 1 year? answer in units of years.
Physics Relativity Level: Misc Level
You,re riding in a very fast train from Chicago to Detroit. In Chicago you set your watch to correct time, but as you ride through downtown Detroit, you notice that your watch differs from the time shown on the clocks in the station! Are all the clocks in Detroit wrong, or is your watch broken?Or is something else going on?Explain.
Physics Modern Physics Level: Misc Level
If you have an atom of Americanium (atomic symbol Am) and it undergoes alpha decay, what type of atom will you have after the decay? (If you don,t know its name, just write the correct symbol from the periodic table.)Explain.
Physics Waves And Oscillations Level: Misc Level
Rank the following in order of largest wavelength to smallest wavelength: green light, a proton traveling at x105m/s, ultraviolet light, a toaster oven sitting perfectly still, a student walking along at 3 mph.
Physics Modern Physics Level: Misc Level
Suppose you want to measure the position of an electron to within 1 angstrom. (An angstrom is 1x10-10m).If you also want to measure its momentum, how accurately can you do this if you don't want to mess up your measurement of its position?
Physics Modern Physics Level: Misc Level
If a photon with (wavelength )=300nm strikes a metal with (angle)=7x10-19J, will any electrons be ejected?Explain.
