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A bullet moving at the rate of 300 m/s is fired into a thick target and penetrates up to 500 mm. If it is fired into a 250 mm thick target, find the velocity of emergence. Take the resistance to be uniform in both the cases.
How many postions are there for viewing an image in a plane mirror? What is the minimum number reuqired to locate an image?
A diffraction grating of 3400 slits percent meter is used to analyze the spectrum of mercury. Discover the angular separation in the first-order spectrum of the two lines of wavelength 579 nm and 577nm.
A piece of wood is 0.640m long, 0.230m wide, and 7.00×10^?2 m thick. What is the mass of this volume of lead
A simple pendulum 89.5cm in length requires 10.70 minutes to make 285 complete swing. how long would a simple seconds pendulum be at the same location?
at a certain time a particle had a speed of 20 ms in the positive x direction and 2.2 s later its speed was 30 ms in
How much time is necessary to catch the car
A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80 oC and the other end is kept at 0 oC. what is the thermal current in the copper bar
The emissivity of tungsten is 0.35. A tungsten sphere of radius 1.5 cm is suspended within a large evacuated enclosure whose walls are at 300 K. What power input is required to maintain the sphere at a temperature of 3000 K
A 0.31 MeV x-ray photon collides with an electron and scatters straight back the way that it came. What is the energy of the backscattered photon
A car with a mass of 950 kg is moving to the right with a constant speed of 1.69 m/s, What is the total force on the car if it is moving to the left
A particle of mass 0.390 g carries a charge of 2.00 x10^-8 C. The particle is given an initial horizontal velocity that is due west and has a magnitude 7.00 x 10^4 m/s. What are the magnitude and direction of the minimum magnetic field that will k..
If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.17o. What is the spacing between reflecting planes in the crystal
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