Elastic Collisions: A proton of mass m is at rest when it is suddenly struck head-on by an alpha particle (which consists of 2 protons and 2 neutrons) moving at speed v. If the collision is perfectly elastic, what speed will the alpha particle have after the collision? (Assume the neutron's mass is equal to the proton's mass.)
A. zero
B. 2v/3
C. 3v/5
D. 5v/3
Answer: C
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You and Mae are in free-float frames. Mae has just passed you, traveling at a speed of 60 km/hr. You throw a ball toward her at a speed of 60 km/hr. What will Mae see the ball doing?
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The pressure falls more rapidly in a quasi-static, adiabatic process than along an isotherm when the volume of the gas is increased
Indicate whether the statement is true or false
A 1 pF capacitor is connected in parallel with a 2 pF capacitor, the parallel combination then being connected in series with a 3 pF capacitor. The resulting combination is then connected across a battery
(a) Which capacitor has the greatest charge? (b) Which capacitor has the greatest voltage?
Answer the following statement(s) true (T) or false (F)
1. The mass of the earth–moon system is somewhat less than the sum of the mass of the earth and the mass of the moon. 2. If the activity of a radioactive sample has decreased by a factor of 4 in time T, then T = 2t1/2.