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Describe what happens to the energy of the two waves when they interfere destructively? Did the energy vanish? (Hint: Find the parts of the rope doing as the wave moves? Find which type of energy is the wave carrying?)
A rifle with a barrel length of 56 fires an 8 bullet with a horizontal speed of 350. The bullet strikes a block of wood and penetrates to a depth of 14. (a) What resistive force (assumed to be constant) does the wood exert on the bullet? (b) How long..
A proton travels with a speed of 3.00 106 m/s at an angle of 24.0° with the direction of a magnetic field of 0.430 T in the +y direction. (a) What is the magnitude of the magnetic force on the proton? N (b) What is its acceleration? m/s2
An object of heat capacity 100 cal/C is initially at 30.0C. Estimate the resulting entropy change of the universe
a 2.4 mw laser beam has its electric field vertical. if it passes through a polarizer with its transmission axis at 30
A duck flying horizontally due north at 14.2 m/s passes over Atlanta, where the magnetic field of the Earth is 5.09×10-5 T in a direction 55.9° below a horizontal line running north and south. The duck has a positive charge of 3.28×10-8 C. What is th..
Is more elastic potential energy stored in a spring when thespring is compressed by one centimeter than when it is stretched bythe same amount? Explain.
A lifeguard on a beach observes that waveshave a speed of 2.60 m/s and a distance of 2.50 m between wavecrests. What is the period of the wave motion
a taut rope has a mass of 0.165 kg and a length of 3.55 m. what power must be supplied to the rope so as to generate
Is the momentum change identical? If not, the ball would have the larger momentum change throughout the collision with the wall?
A rifle bullet of mass 8.6 g is fired into a 1.23 kg block where it becomes embedded. what was the initial speed of the bullet
A ball is dropped from a height of 4 m and makes an elastic collision with the ground. Assume that no mechanical energy is lost to air resistance. Is the motion simple harmonic
A yo-yo is made of two solid cylindrical disks, each of mass 0.049kg and diameter 0.074m , What fraction of its kinetic energy is rotational
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