What fraction of the initial amount of an isotope
It has been stated that ten half-lives are sufficient for a radioactive isotope sample to decay to backround levels. What fraction of the initial amount of an isotope actually does remain after ten half-lives?
Expected delivery within 24 Hours
A singly charged ion of unknown mass moves in a circle of radius 12.5 cm in a magnetic field of 1.2T. The ion was accelerated through a potential difference of 7.0 kV before it entered the magnetic field. What is the mass of the ion?
Suppose there is a room background of 21 counts per minute. If you count the signal and background rate for 10 minutes each, what is the percent error of the net counting rate?
Their molar entropies are in teh sequence H2O <Hg< Br2.Using molecular properties, explain why bromine is more disordered than mercury but water is the most highly order of these thress.
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.169 rad/s2.
(a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to make one revolution?
By how many kilograms does the mass of the nuclear fuel decrease in one year? (Assume an efficiency of 35 percent for a nuclear power plant.)
Determine the maximum shear stress developed in the shaft. The shaft has an outer diameter of 80 mm, and the thickness of the wall of the hollow segment is 10 mm.
The nine brand B cars that were tested averaged 32.1 mpg, and the standard deviation was 4.3 mpg. At =0.01, should it conclude that brand A cars have lower average gas mileage than do brand B cars?
1927223
Questions Asked
3,689
Active Tutors
1458460
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Explain how we can use these tools and tactics catalytically to produce the kind of urban growth we want, and suppress the kind of destructive growth
Question: If you eat a mushroom that is producing spores, what is the complete ploidy of the fungi that you ate?
Research and select a local food web that includes a keystone species. Explain the role of the keystone species in the food web.
Which of these is the best description of the relationship between the central nervous system (CNS) and the peripheral nervous system (PNS)?
Question: Which of the following correctly matches the enzyme with its substrate?
The process of transforming certain products such as yeast, carbon, hydrogen,etc. into ethyl alcohol and carbon dioxide is called fermentation?
Question: All of the following are methods of disinfection or sterilization except? Need Assignment Help?