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9.00 of aluminum at and 19.0 of copper are dropped into 51.0 of ethyl alcohol at . The temperature quickly comes to 23.0. What is the initial temperature of Copper?
Suppose that an electron trapped in a one-dimensional infinite well of width 322 pm is excited from its first excited state to the state with n = 5. What energy (in eV) must be transferred to the electron for this quantum jump
Two 1000 kg cars drive east; the first moving at 25 m/s, the second at 15 m/s. What is the magnitude of the total momentum of the system
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. What is the cutoff frequency for the emitter
A space station in the forf of a large wheel, 129m in diameter, rotates to provide an "artificial gravity" of 6.10 m/s^2 for people located at the outer rim.
For 140 keV gamma rays, the mass attenuation coefficients for hydrogen and oxygen are 0.26 and 0.14 cm^2/g, respectively. What is the mean free path in water at this energy
The sport with the fastest moving ball is jai alai, where measured speeds have reached 303km/h. If a professional jai alai player faces a ball at that speed and involuntarily blinks, he blacks out the scene for 100ms. How far does ball move throughou..
A .5 kg block rests on a horizontal frictionless surface. It faces toward an inclined surface. How fast is the block going at that max height
A 240g block on a 60cm-long string swings in a circle on a horizontal, frictionless table at 70rpm.
A ceramic coffee pot with m=116g and c=1090J/(Kg*k), is initially at room Temp(24 celcius). what is the equalibrium temerature of the sysytem
You look at yourself in a shiny 8.4-cm-diameterChristmas tree ball. If your face is 21.0cm away from the ball's front surface, where is your image? Follow the sign conventions. Is it real or virtual
Tasha with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. What is the power of the lens she uses
If an electron makes a transition from the n = 4 Bohr orbit to the n = 3 orbit, determine the wavelength of the photon created in the process
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