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If an object has a moment of inertia 21 kg·m2 and rotates with an angular speed of 110 radians/s, what is its rotational kinetic energy?
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 19 degrees. What is the longest focal length lens
A bullet of mass m is fired into a hanging wood block of mass M and pendulum length L. The block, with the bullet embedded, swings up to the point the angle with the vertical ?. Calculate the speed with which the bullet made contact with the block,
A double-slit apparatus consists of two of slits separated by 0.25 mm with a screen 5.0 cm away. Calculate the wavelength of the light
If astronauts could travel at v = 0.980c, we on Earth would say it takes (4.20/ 0.980) = 4.29years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree. How much time passes on the astronauts ‘clocks?
A swimming pool has dimensions 32.0 m ? 12.0 m and a flat bottom. The pool is filled to a depth of 2.30 m with fresh water. What is the force exerted by the water on the bottom
A plane polarized EM wave propagates through a polymer. Such waves obey a similar wave equation to that found for free space. The wave has a magnetic field vector, ??=[(?1.2??)?sin(??y+??t)] ?T, with frequency ??=7.61×10^(14) Hz and wave number ??..
Primary coil of a 1000 Watt, 120 Volt to 220 Volt set-up transformers has 400 turns. Determine number of turns in the secondary coil of this transformer and the currents in both coils
A wire carries a current of 6.0 A in a direction that makes an angle of 36.0° with the direction of a magnetic field of strength 0.300 T. Compute the magnetic force on a 7.00-m length of the wire.
a flat surface having an area of 3.6 m2 is rotated in a uniform electric field of magnitude e 5.6 x 105 nc.determine
Two identical, small insulating balls are suspended by separate 0.36-m threads that are attached to a common point on the ceiling. obtain the tension in the threads
A student is reading a lecture written on a blackboard. If the writing on the blackboard is 4.80 cm high, what is the size of the image on her retina
An ideal gas is maintained at a constant pressure of 200 N/m^2 during an isobaric process while its volume decreases by 0.2 m^3. What work is done by the system on it's environment
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