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Use the ideal gas as a model to estimate the rms speed of a free electron in a metal at the following temperatures.
a) 273 K
b) 2700 K (a typical temperature of the cathode in a CRT).
An undamped 1.42-kg horizontal spring oscillator has a spring constant of 29.9 N/m. While oscillating, it is found to have a speed of 2.53 m/s as it passes through its equilibrium positio
A 954 kg drag race car accelerates from rest to 113 km/h in 0.919 s. What change in momentum does the force produce
An astronaut is traveling to the Moon at a speed of 0.57c. When his spacecraft is1.9*10 8 m from the Moon, there is an explosion on the Moon. How long does it take for light from the explosion to reach the astronaut as gauged on the astronaut's clo..
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
consider a rocket launched from vandenberg afb ca longitude34.6 degrees having an initial velocity of 3 kms in the
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. But she does have devices to measure distance and time accurately. What is the mass of this canister
A wire is 1.50 m long and has a diameter of 1.5. The tensile modulus of the wire is 6.20 x 10^10 N /m. what is the increase in length of the wire
A wheel of radius 2m (I=MR^2) has a rotational kinetic energy of 4800 J when rotating at 20 rev/s. What is the final angular speed of the system
A copper wire of radius a = 0.331 mm has an aluminumjacket of outer radius b = 0.459 mm. There is a currenti = 2.23 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8Ω·m and2.75 x 10-8Ω·m.
A rock is lauched from the moon and travels away from it at a speed of 2/5, Call the event of the rocket's lauching event A, Draw a spacetime diagram of the situation, drawing and labeling the worldlines of the moon
A 57.0-g tennis ball is traveling straight at a player at 21.0 m/s. The player volleys the ball straight back at 25.0 m/s. what average force acts on the ball
At one position and time, the magnetic field of an em wave invacuum is 10.0 mT right ( ) and its electric filed is 3.0 MV/mout of the paper. Find the corresponding Poynting vector(direction relative to the paper).
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