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Light travels from air through a flat sheet of glass (n =1.5) into water. If the angle of incidence in air is 39°, what is the angle of the refracted ray in water?
A machinist turns the power on to a grinding wheel, at rest, at time t=0 s. What is the angular velocity in the time interval from t=0 to t=25s
Light with a wavelength of 4.5 x10-5 cm passes through a single slit and falls on a screen 100 cm away. If the slit is 0.015 cm wide, what is the distance from the center of pattern to first dark band.
What is kinetic energy of the shell
Two identical speakers are driven by the same oscillator @ 200Hz. They are located on a vertical pole & 4.00 m apart. A man walks straight towards the lower speaker perpendicular to the pole.
The minute hand of a wall clock measures 14 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals.
a transformer has N^1 =350 turns and N^2 =2000 turns. If the input voltage is 170V, what voltage is developed across the secondary coil?
A wheel of diameter 24.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. What is the torque about the rotation axis at this instant
A major-league pitcher can throw a baseball in excess of 41.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 18 m away from the point of release.
The nucleus of Be (atomic mass=8) is an unstable isotope of beryllium, and decays into two alpha particles (helium nuclei) via the process 8Be "decays to" 4He+4He. Find the kinetic energy of each of the alpha particles
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, determine the thermal conductivity of the Styrofoam
Find out a magnitude and direction of the electric field
A large iron cylinder of mass 265 kg rests so that its circular face rolls along the edge of a table, How far has the system moved along the horizontal
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