We can use the textbook results for head-on elastic collisions to analyze the recoil of the earth when a ball bounces off a wall embedded in the earth. suppose a professional baseball pitcher hurls a baseball ( 155 grams = 0.155 kg) with a speed of 103 miles per hour ( 45.3 m/s) at a wall, and the ball bounces back with little loss of kinetic energy. (a) what is the recoil speed of the earth (m = 6x10^24 kg)? v earth = m/s (b) calculate the recoil kinetic energy of the earth and compare to the kinetic energy of the baseball. the earth gets lots of momentum (twice the momentum of the baseball) but very little kinetic energy. k earth = j k baseball = j
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The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?
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Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.
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We can use the textbook results for head-on elastic collisions to analyze the recoil of the earth wh...
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