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 100 miles per hour ( 44.0 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 ( 6 × 1024 kg)? m/svearth = 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. kearth = j
kbaseball = j
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When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?
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Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.
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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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