3. The counting rate of a radioactive sample (including background) is 1200 counts in one minute....

3. The counting rate of a radioactive sample (including background) is 1200 counts in one minute. The background counting rate is 400 counts in one minute. What is the percent
standard deviation of the net count rate?

Please solve in details step by step!!

Expert Solution

genius_generous answered 2 years ago

Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at t = 0 is 3000 counts/s.

Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at t = 0 is 3000 counts/s. a. What is the counting rate after 2 min? b. After 6 min? c. After 10 min? d. After 20 min? e. What is the mean life of this nucleus? f. Suppose that the Geiger counter detects 10% of all the radioactive decays. What is the total number of radioactive nuclei at time t=0? g. What is the total number at t 2 min? h. How many...

Q.3:(a) Briefly describe the radioactivity phenomena with examples. (b) The counting rate of a radioactive source...

Q.3:(a) Briefly describe the radioactivity phenomena with examples. (b) The counting rate of a radioactive source in the beginning (t=0) is 4000 counts/s. After 10 seconds the counting rate drops to 1000/s. (i) What is the half-life of the radioactive source? (ii) What will be counting rate after 20 s?

The activity of a radioactive sample is the number of decays per minute that occur in...

The activity of a radioactive sample is the number of decays per minute that occur in the sample. We measured this by detecting the radiation entering the Geiger tube window. Explain why our readings were actually only a small fraction of the actual activity. Also, why did that not seem to matter in the determination of Barium-137m’s half-life? Refer to either your A vs. t or your ln A vs. t graph in your explanation.

Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at...

Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at time t = 0 is 3000 counts/10 sec. a. What is the counting rate after 2 min? b. After 6 min? c. After 10 min? d. After 20 min?

The altitude of a triangle is increasing at a rate of 3 centimeters/minute while the area...

The altitude of a triangle is increasing at a rate of 3 centimeters/minute while the area of the triangle is increasing at a rate of 4 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 8 centimeters and the area is 82 square centimeters?

In a waiting line situation, arrivals occur at a rate of 3 per minute, and the...

In a waiting line situation, arrivals occur at a rate of 3 per minute, and the service times average 12 seconds. Assume the Poisson and exponential distributions. a. What is λ? What is μ? b. Find average number of units in the system. c. Find average time in the waiting line. d. Find probability that there is one person waiting. e. Find probability an arrival will have to wait.

(a) (i) A radioactive sample produces 1536 decays per second at one point in an experiment...

(a) (i) A radioactive sample produces 1536 decays per second at one point in an experiment and 55.888 years later produces 320 decays per second. What is the half-life of this sample? (ii) What is the decay (in y-1)? (iii) What is the mean lifetime of the material? (b) What fraction of a sample of phosphrous-32 is left after 64.26 days? (the half-life of phosphorous-32 is 14.28 days) (c) What period of time is required for a sample of radioacive...

Among a sample of 16 people, the average heart rate was 69.0 beats per minute with...

Among a sample of 16 people, the average heart rate was 69.0 beats per minute with a standard deviation 4.3 beats per minute. We are interested in the mean heart rate of the population. We assume that the heart rate is normally distributed, and that the population standard deviation is 4.8 beats per minute. At 95% confidence, what is the error bound?

Using the sample in question 3, how many counts per second would be observed when the...

Using the sample in question 3, how many counts per second would be observed when the detector is 10 meters away from the sample? 5. If a 10 gram sample of a radioactive substance has a half-life of 6000 years, how much would be present after 8000 years? 6. If Nitrogen-14 absorbs an alpha particle and then emits a Hydrogen-1, what is the resulting nucleus? 7. If Au-185 emits an alpha particle, what is the nucleus formed? 8. What nucleus...

the mean resting pulse rate of men is 76 beats per minute. a simple random sample...

the mean resting pulse rate of men is 76 beats per minute. a simple random sample of men who regularly work out at Mitch's gym is obtained and their resting pulse rates are listed below. use a 0.05 significance level to test the claim that these sample pulse rates come from a population with a mean less than 76 beats per minute. assume that the standard deviation of the resting pulse rates of all men who workout at Mitch's gym...

Question