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An aluminum wing on a passenger jet is 27 meter long when its temperature is 19°C. Obtain at what temperature would the wing be 8 centimeter (0.08 meter) shorter?
A hotel elevator ascends 190 m with a least speed of 4.0 m/s. Its acceleration and deceleration both have a magnitude of 1.4 m/s2.
consider a state function which is a superposition of two lowest eigenfunctions of the infinite square well, that is \(\psi=1/\sqrt{a}cos\pix/2a + 2/\sqrt{a}sin\psix/a\), calculate the expectation value of the kinectic energy
100 g of a certain radioactive sample are sealed into a container. after 10 years, only 25 g remain. what is the half life of the sample
A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal. How many forces act on the crate
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.35 Earth years in its circular orbit around its sun, Find the radius of the exoplanet\'s orbit
As astronauts travel between the Earth and the moon, their mass remains constant, but their weight diminishes. Determine the minimum weight an astronaut would have
An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.984c. Determine what is the proper lifetime
When you drop a rock into a well you hear the splash 1.0 seconds later. How deep is the well
A skater spins with an angular speed of 17.7 rad/s with her arms outstretched. She lowers her arms, decreasing her moment of inertia with a factor of 2.9. Ignoring friction on the skates, decide the ratio of her final kinetic energy to her initial ki..
Assuming that all radiation is emitted at the wavelength of peak intensity, for a skin temperature of 34 degrees C and a surface area of 1.6 m2, how many photons per second does the body emit
In the figure (Figure 1) the upper ball is released from rest, collides with the stationary lower ball, and sticks to it. The strings are both 48.0 long. The upper ball has mass is 1.80 and it is initially 10.0 higher than the lower ball, which ha..
The depth of the potential well for free electrons in a metal can be correctly determined with observing that the photoelectric work function is the energy necessary to remove an electron at the top of the occupied states from the metal;
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