Physics Properties Of Matter Level: Misc Level
A block weighing 5.00 kg hangs from a spring and stretches it by 15. 0 cm .what is the spring constan?If the spring is stretched further and released, what is its period of oscillations?
Physics Waves And Oscillations Level: Misc Level
A transverse wave is described by the equation y = A sin ( 12 x + 3600 t). what is the speed of the wave? what is the direction in which the wave is traveling? (All units are SI units.)
Physics Waves And Oscillations Level: Misc Level
A mass of 500 g is fastened to a spring with a spring constsnt of 50 N/M.If the system is set into oscillation, whta are the angular frequency, time period, and frequency of oscillation?
Physics Modern Physics Level: Misc Level
what is the wavelength of a photon that has the same frequency as an electron( mass is 9.11x 10 to the -31 kg) traveling at 2 x10 to the 6th m/sec?
Physics Relativity Level: Misc Level
If "Superman "who is faster then a speeding bullet, can go 21,000 m/s, then how much more does he weigh if he weighs 200 lb when standing still?
Physics Electromagnetic Waves Level: Misc Level
In a certain TV set, the electron beam is accelerated through a potential difference of 20,000 V. what is the shortest - wavelength x- ray emitted as the beam strikes the end of the picture tube?Fortunately, very little of this radiation can penetrate 0.5 cm of glass. Even thinner sheets of metal will effectively stop the x- radiation . Longer- wavelength x- rays are much more easily stopped.
Physics Modern Physics Level: Misc Level
Hydrogen atoms are usually found in the ground state, that is, the electron is in the n= 1 level . what wavelength light striking the atom will excite it to the n= 2 level?
Physics Modern Physics Level: Misc Level
A particle is accelerated through 200 V. Find its speed and de Broglie wavelength if is a) an electron b)a proton
Physics Modern Physics Level: Misc Level
The photoelectric threshold wavelength for pure sodium metal is 546 nm. How much energy (in electronvolts ) is needed to tear an electron away from this metal?
Physics Modern Physics Level: Misc Level
A certain radio station radiates 5000 w of power at a frequency of 1.2 x 10 to the 6th Hz a) what energy photons does the station radiate? b) How many photons does it send out each second?
Physics Modern Physics Level: Misc Level
In present -day nuclear accelerators, protons can be accelerated through 10 to the 9th power V. a) what is the ratio m/mo for such a proton ? b)How fast in comparison to c, is the proton moving?
Physics Force & Laws Of Motion Level: Misc Level
Find the ratio m/mo for an object at the following speeds: a) 0. 10 c b) 0. 30 c c) 0. 70 c d) 0.90 c
Physics Properties Of Matter Level: Misc Level
George is going to bungee jump from a bridge that is 59.0 m over the river below. The bungee cord has an unstretched length of 21.5 m. To be safe , the bungee cord should stop George, s fall when he is at least 2.00 m above the river. Ignoring air resistance, if George has a mass of 75.0 kg , what is the minimum spring constantof the bungee cord?
N/m
Physics Work,Power & Energy Level: Misc Level
Rhonda keeps a 1.1 kg model airplane moving at constant speed in a horizontal circle at the end of a string of lenght 0.9 m. The tension in the string is 14 N. How much work does the string do on the planc during each revolution ? J
Physics Properties Of Matter Level: Misc Level
An ideal spring has a spring constant k= 20.0 N/m. what is the amount of work that must be done to strech the spring 0.70 m from its relaxed length?
