Part-A : The half life of this nuclide will be given as -
using a formula, we have
N = N0 e-t
(9.45 x 1010 Bq) = (7.54 x 1011 Bq)
e-t
[(9.45 x 1010 Bq) / (7.54 x 1011 Bq)] =
e-t
(0.12533156) = e-t
- t = ln
(0.12533156)
= (2.07679) /
(92.4 min)
= 0.02247
min-1
We know that, = (0.693) /
t1/2
t1/2 = (0.693) / (0.02247 min-1)
t1/2 = 30.8 min
A sample of the rul'd pt that has an input of 7.54 times 10 bq 92.4...
11. (5 pt) For a 1 mCi sample, what is the activity of 18F in Bq? 18F decays by positron emission with a half-life of 109 minutes. a. 3.7 x 104 Bq b. 3.7 x 107 Bq c. 3.7 x 1010 Bq d. 2.7 x 10-3 Bq e. 2.7 x 10-11 Bq
A sample of radioactive material contains 1.1E15 atoms and has
an activity of 6.3E11 Bq. What is its half-life?
A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...
What is the activity of the sample in Bq?
Cobalt-60, which undergoes beta decay, has a half- life of 5.26 yr. N = 3.14x1013 B-particles SU Previous Answers All attempts used; correct answer displayed Part B What is the activity of the sample in Bq? t V AC o XD x x x XI .X.10 > . Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
The frequency of the light that has an energy of 5 times 10^3 J is approximately: a. 4.35 times 10^-34 Hz b. 2 times 10^13 Hz c. 3.313 times 10^-32 Hz d. 7.55 times 10^14 Hz Total internal reflection occurs when the angle of incidence is: a. greater than the angle of refraction b. Greater than the critical angle c. Equal to the angle of incidence d. Equal to the critical angle The critical angle for light moving from quartz...
A sample of lead has a mass of 92.00 kg and a density of 1.130 times 10^4 kg/m^3 at 0 degree C. (Assume the average linear expansion coefficient for lead is 2.900 times 10^-5 (degree C^-1).) (a) What is the density of lead at 72.00 degree C? (Give your answer to four significant figures.) kg/m^3 (b) What is the mass of the sample of lead at 72.00 degree C? kg
Score: 0 of 1 pt 10 of 18 (1 complete) 6.1.29 Find the minimum sample size n needed to estimate u for the given values of c, o, and E. C=0.90, 0 = 6.1, and E = 1 Assume that a preliminary sample has at least 30 members. (Round up to the nearest whole number.) na
Calculate the wavelength of light in vacuum that has a frequency of 5.27 times 10^15 Hz. What is its wavelength in water? Calculate the energy of one photon of such light in vacuum. Express the answer in electron volts. eV Does the energy of the photon change when it enters the water? The energy of the photon changes. The energy of the photon does not change. Explain. This answer has not been graded yet.
10. (10 points) One has 600 light bulbs whose life times are independent exponential random variables with parameter λ-1/10 hours. Find the approximate probability that there are at least 250 bulbs which last longer than 10 hours
10. (1 pt) The living space of all homes in a city has a mean of 2100 square feet and a standard deviation of 500 square feet. Let Xbe the mean living space for a random sample of 625 homes from this city. The probability that this mean living space is less than 2069 square feet is (a).0478 (b) .9394 (c) .8788 (d).0606 (e) .5239
Develop a PLC ladder logic for motor lockout to prevent a machine operator from starting a motor that has tripped off more than 5 times in an hour. The sequence of operation is given below. Please use the same names (or addresses) for input/outputs as given below. Assume the PLC tick time is 10ms 18j List of Inputs and Outputs: Sequence of Operations: Inputs: 00: Start (Momentary push button) The normally open overload (OL)-retay 01 : Stop (Momentary push button)...