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A thin homogeneous triangular plate of mass 2.5 kg is welded to a light vertical axle supported by bearings at A and B. Knowing that the plate rotates at the constant rate ω = 8 rad/s, determine the dynamic reactions at A and B.
A deuteron (a neutron and a proton) has a mass of 3.34 x 1027 kg and a charge of +e. Find the time required for it to make one half of a revolution
The capacitance of an empty capacitor is 2.5 x 10^-6 F. The capacitor is connected to a 3 volt battery and charged up, Write the equation for q in terms of K, C(subscript zero), and V
A river flows with a uniform velocity vr. A person in a motorboat travels 1.13 km upstream, at which time she passes a log floating by. Calculate the boat's speed relative to the water
A radioactive isotope has an activity of 9.32×104 Bq initially. After 3.55 hours the activity is 6.71×104 Bq. What is the half-life of the isotope?
a student starting from rest slides down a water slide. on the way down a kinetic frictional force a nonconservative
Copper wire has a breaking stress of about 3×10^8 N/m2. What is the highest load that can be hung from a copper wire of diameter 0.420 mm.
A group of students determined that the following points were upon the best fit line for a graph of W2 vs. Determine the total mass of the system
While helping an astronomy professor, you find a binary star system in which the two stars are in circular orbits about the system's center of mass. From their color and brightness, you decide that each star has the same mass as our Sun.
A nucleus of mass 228 u, initially at rest, undergoes alpha decay. find the kinetic energy of the recoiling daughter nucleus
a particle moves on the x axis attracted toward the origin o on itwith a force proportional to its instantaneous
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
The Olympic Flame at the 1992 Barcelona Olympics was lit by a flaming arrow shot from a point 60 meter horizontally and 24 meter vertically from the flame. Find the initial speed necessary for the arrow
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