physics

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it decays into an a particle of mass 6.64×10^−27 kg and 234Th nucleus of mass 3.88 × 10^−25 kg, and the decay process itself is extremely fast(it takes about 10^−20 s). Suppose the uranium nucleus was at rest just before the decay. If the a particle is emitted at a speed of 1.07×10^7 m/s, what would be the recoil speed of the thorium nucleus?
Answer in units of m/s.

I got -183113.4021m/s, but that was wrong, and so was 183113.4021m/s

  1. 👍
  2. 👎
  3. 👁
  1. Don't use so many significant figures.

    I get 1.83*10^5 m/s

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chem 101

    In a fission reaction, uranium-235 bombarded with a neutron produces strontium-94, another small nucleus, and 3 neutrons. Write the nuclear equation for this reaction.

  2. college math

    the half life of Uranium -238 is 4.5 billion years and the age of earth is 4.5 X 109 years. What fraction of Uranium-238 that was present when earth was formed still remains?

  3. biology

    Which of the following statements about the nucleus is NOT true? a. The nucleus stores coded instructions for making the cell's proteins.*** b. The nucleus usually contains a nucleolus region which is where ribosome assembly

  4. Chemistry(difficult)

    A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of 206Pb per 1.185 g of

  1. Chemistry

    Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years. A rock is found to

  2. science

    Examine the following equations. A. 23490Th→23491Pa+0−1e+γ B. 60∗27Co→6027Co+γ C. 23490Th→23088Ra+42He D. 146C→147N+0−1e Which equation or equations represent gamma decay? B C A and B A A and D D C and D Which

  3. Chemistry

    A rock contains 200. µmol 238U (t1/2 = 4.5 109 yr) and 116 µmol 206Pb. Assuming that all the 206Pb comes from decay of the 238U, estimate the rock's age. Please explain step by step.

  4. 11th grade

    How many uranium atoms are there in 9.5 g of pure uranium? The mass of one uranium atom is 4 × 10−26 kg

  1. Math

    Radioactive​ uranium-235 has a​ half-life of about 700 million years. Suppose you find a rock and chemical analysis tells you that only one sixteenth of the​ rock's original​ uranium-235 remains. How old is the​ rock?

  2. physics

    A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it decays into an a particle of mass 6.64×10−27 kg and 234Th nucleus of mass 3.88 × 10−25 kg, and the decay process itself is extremely

  3. Chemistry please check

    1. All of the naturally occurring radioactive decay series end when the radioactive elements have decayed to bismuth (Bi) hydrogen (H) lead (Pb) uranium (U) answer: Uranium (U) 2. This type of radiation can easily pass through a

  4. chemistry

    The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 339 milligrams of uranium?

You can view more similar questions or ask a new question.