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A 15 lb block B starts from rest and slides on the 25 lb wedge A, which is supported by a horizontal surface. Neglecting friction, determine the a) the velocity of B relative to A after it was slid 3 ft down the inclined surface of the wedge. The angle is 30 degrees.
A beam of light is emitted in a pool of water from a depth of 62.0cm. Where must it strike the air-water interface, relative to the spot directly above it
Consider the glass prism in the figure below, for which ? = 22° and ? = 68°. What is the smallest angle ?1 for which a laser beam will undergo total internal reflection
question explain why the two lines on your graph should always cross at the frequency where xc r. find this frequency
A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.1 m behind the grating. What is the distance between the two m= 1 fringes? Use two significant figures
The rms current in an RL circuit is 0.32A when it is connected to an ac generator with a frequency of 60Hz and an rms voltage of 25V. Find the rms voltage across the inductor
500 cm3 of ideal gas at 40 oc and 200 kpa absolute pressure is compressed to 250 cm3 and cooled to 20 oc. what is the
The momentum of a soccer player is 100kg-m/sec and he hits a soccer ball with a mass 0.1 kg, find the speed(velocity) of the soccer ball
two metal spheres each of radius 2.0 cm have a center-to-center separation of 3.30 m. sphere 1 has charge 1.10 10-8 c.
A 5-kg fish swimming 1 m/s swallows an absent-minded 1-kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch
a persons forearm consists of a bone which we can model by a rigid rod that is free to rotate around the elbow. when
A "rocket car" is launched along a long straight track at t = 0 s. It moves with constant acceleration a1 = 1.2m/s2. At what time does the second car catch up with the first one
A 8.51 -m ladder with a mass of 21.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 245 N. What is the net torque acting on the ladder
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