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A steel beam 10m long is installed in a structure at20oC. What are the beam's changes in length at thetemperature extremes of -30oC to45oC?
A 5.78 cm long rod in the shape of a rectangular solid has cross section dimensions 28.7 mm x 42.6 mm. What is the current in the block
What is the density of Kripton gas at standard temperature and pressure? The atomic mass of Kripton is 83.80 atomic mass unit
An ideal gas is enclosed in a cylinder that has a moveable piston on top. The piston has a mass of 6200 g and an area of 5 cm2 and is free to slide up and down.
Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. What is the wavelength of the these gamma rays
A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. Determine the current in the rods
Sarge quickly approximates the rope to be a string with a very high spring constant. What is the speed of wave propagation on the rope
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall
You are holding a bulletin board weighing 8.68 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.42
Derive Lagrange's equation of motion for a uniform thin dizk that rolls without slipping on a horizontal plane under the influence of a horizontal force applied at its center. Determine the generalized force.
If the x- and y- components of a vector of 6.0 m at 45 degrees are tripled what is the magnitude of a new vector and what is the direction
The energy eigenstates of the hydrogen atom are described by Schrödinger wavefunctions ?(r), where the energy of the ground state ?100(r)=-13.6eV. Determine the expectation value of the energy
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