QUESTION 4 Mass number is based on the number of protons and neutrons. True B 1 If false, explain why it is false. x² X₂ Aa A‡ A # Ω ¼ False✔

Question 26 3.3pts Doctors nationally believe that 78% of a certain type of operation are successful. In a particular hospital, 52 of these operations were observed and 42 of them were successful. At a = 0.05 is this hospital's success rate different from the national average? O Yes, because the test value 0.28 is in the critical region. O No, because the test value 0.28 is in the noncritical region. O No, because the test value 0.48 is in the noncritical region. O Yes, because the test value 0.48 is in the noncritical region.

Question 18 of 20 View Policies Current Attempt in Progress When any radioactive dating method is used, experimental error in the measurement of the sample's activity leads to error in the estimated age. In an application of the radiocarbon dating technique to certain fossils, an activity of 0.110 Bq per gram of carbon is measured to within an accuracy of 9.00 percent. Find (a) the age of the fossils and (b) the maximum error (both in years) in the value obtained. Assume that there is no error in the 5730-year half-life of C¹4 nor in the value of 0.23 Bq per gram of carbon in a living organism (a) Number (b) Number Save for Later Units Units Attempts: 0 of 1 used Submit Answer

Calculate unknown reactions and draw the FBD

Using values from this table, how many DNA molecules could be broken by the energy carried by 1 kg of hydrogen via fusion to helium? molecules Additional Materials Reading +.

2 / 2 221% The following system Radioactive Decay Series of differential equations is encountered in the study of the decay of a special type of radioactive series of elements: dx = - Ajx dt %3D dy = Ax - 2y, dt where A and A, are constants. Discuss how to solve this system subject to x(0) = x0, y(0) = yo- Carry out your ideas. %3D

You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. Part A Approximately how much more time you will need to wait until less than 0.1% of the original polonium sample remains? 21 minutes 1 hour and 10 mins 3 hours and 30 mins 35 minutes Submit Request Answer

A radioactive sample has a half-life of 1.0 min. That is, each nucleus has a 50% of undergoing a decay sometime between t = 0 and t = 1 min. One particular nucleus has not decayed at t = 15 min. Part A What is the probability that this nucleus will decay sometime between t = 15 min and t = 16 min? Express your answer using two significant figures. ΤΟ ΑΣΦ ? %

The neutron was found in the laboratory in what year?   a. 1788   b. 1849   c. 1888   d. 1932   e. 1970

Question A8 Sketch a diagram indicating the s-process path from 131 Xe to 140 Ce. Specify the type of each process (i.e. neutron capture, electron capture, beta decays) in the path.