- Use the following information to answer the question. The element (}^238_{92)U undergoes radioactive decay until it attains a stable state as (}^206_{82)Pb . The first four stages of this decay series are as follows: (}^238_{92)Uarrow ^234_(90)Tharrow ^234_(91)Paarrow ^234_(92)Uarrow ^230Th The particles emitted in each of these steps,respectively, are A. alpha, beta, beta, alpha B. beta, alpha, alpha.beta C. alpha, gamma, gamma alpha D. gamma, alpha, alpha,gamma
- Use the following information to answer the question. In an experiment, a researcher studied the decay of (}^210_{84)PO , which decays by alpha emission and releases a stable (}^206_(82)Pb atom. The half-life of ()^210_{84)Po is 138.4 days.The mass of the sample of (}^210_{84) Po at the start of the experiment was 34.0 g. Numerical Response 6. The amount of {}^21084 Po remaining after 415.2 days was __ g.
- Use the following information to answer the question. In an experiment, a researcher studied the decay of (}^210_{84)PO which decays by alpha emission and 210_(84) Po at the start of the experiment was 34 .og. releases a stable (}^206_(82)Pb atom. The half-life of ()^210_{84)PO is 138.4 days.The mass of the sample of Numerical Response 6. The amount of 210_(84) Po remaining after 4152 days was __ g. (Record your three-digit answer in the numerical-response section on the answer sheet.)
- 5. A bungee jumper is falling at a velocity of 25m/s [down] when the bungee cord just starts to stretch. After the cord stretches for 2.5 s,the velocity is 11m/s [down]. Assume that the acceleration is constant. a. What is the acceleration of the jumper?
- 10. A skier has just begun descending a 20^circ slope. Assuming that the coefficient of kinctic friction is 0.10 calculate a) the acceleration of the skier. b) his final velocity after 8s.
