Post a New Question

physical science

posted by .

If a sample emits 1000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 2 meters from the sample?

  • physical science -

    Can you answer this please !

  • physical science -

    Doubling the distance will result in a count of (1/2)^2= 1/4 the original
    count. 1/4 of 1000 = 250 counts per minute.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. geology

    suppose you have a sample of clamshell at a paleoindian site and you measure the 14c activity of aa 100-gram sample of carbon as 320 disintegretions per scond (or 3.2 disingtegrations per gram of carbon per second). a. what was the …
  2. Physics

    The speed of sound is about 340 m/s. Assume that when the motion detector emits an ultrasonic pulse, it must detect the reflected pulse before it can emit its next pulse. Assuming that the length of the air track is about 2 meters, …
  3. CHEMISTRY

    Suppose you had a detection device that could count every decay event from a radioactive sample of plutonium-239.052156 (t1/2 is 24,000 yr). How many counts per second would you obtain from a sample containing 0.126 g of plutonium-239?
  4. physics lab

    For an unknown sample of the experiment, students measure 1602 counts when they first receive their sample and 1317 counts 3.5 minutes later. Calculate the half-life t12 of their sample.
  5. physical science help please!

    If a sample emits 1000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 2 meters from the sample?
  6. Science

    A radioactive substance is found to register 1000 counts per second on a Geiger counter. Twenty-four hours later it registers 125 counts per second. What is its half-life?
  7. Chem

    Living organisms give a Carbon-14 decay rate of 15.3 counts/min for each gram of carbon in the sample. A sample of bristle cone pine wood has a decay rate of 3.20 counts/min per gram of carbon. Calculate the age of the wood from the …
  8. math

    Write the ratio has a unit rate 8 meters to 10 seconds 1)0.8 meter per second 2)1.125 meters per second 3)2 meters per second 4)80 meters per second
  9. Chemistry

    a sample of radioisotope has a count rate measured by a Muller-Geiger counter of 160 counts per minute. this drop to 20 counts per minute in 1 hour. What is the half life of this source.
  10. Math

    Write the ratio as a unit rate. 8 meters in 10 seconds A. 0.8 meter per second B. 1.125 meters per second C. 2 meters per second•• D. 80 meters per second

More Similar Questions

Post a New Question