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Q. Two particles of charge Q(-L,0) and nQ(αL,0) where n = 10. When a third charge is placed at the origin, it is found that the force on it is zero. Find α.
Q. Two forces FA and FB are applied to an object whose mass is 16.7 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 0.859 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.500 m/s2, due east. Find (a) the magnitude of FA and (b) the magnitude of FB.
A railroad boxcar that has " due east" momentum of 15,000 kgm/sec collides with and couples with a similar boxcar that has "due west" momentum of 20,000kgm/sec. After collision, the combination has ( ) kgm/sec total of momentum.
calculate the average acceleration in m/s^2 (meter per second square), using a coordinate system with the X axis in the direction of the car's original motion and the Y axis toward the side of the road to which the car skids.
What's the advantage of launching space vehicles from high flying aircraft in place of from the ground.
A grating has 776 lines per centimeter. Find out the angles of the first three principal maxima above the central fringe when this grating is illuminated with 603 nm light.
A bat in a cave emits a sound pulse and receives an echo 0.22 second later. Assuming that the speed of sound is 339 m/s, how far did the sound (the longitudinal wave) travel during this time.
Two identical positive charges exert a repulsive force of 6.6 x10-9 N when separated by a distance of 5.4 10-10 m. what is the charge of each.
A cube of ice is taken from the freezer at -8.0°C and placed in a 97 g aluminium calorimeter filled with 286 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of the ice cube.
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
A particle with a charge of q = -5.10 nC is moving in a uniform magnetic field of vec{B}=( -1.24 T ) hat{z}. The magnetic force on particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y}.
find the mass of Earth from the period T and the radius r of the Moon's orbit about the Earth. T=27.3 days and r=3.82E5 km. suppose the Moon orbits the center of Earth rather than the center of mass of the Earth-Moon system.
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
Two spherical objects have a combined mass of 200. The gravitational attraction between them is 8.01×10-6 while their centers are 21.0 apart.
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