Tag Archives: mathematically

What do you think is the longest half-life of a radioactive isotope that could be used for medical imaging? Explain your answer, and write down one or two other interesting things you learned in Section 32.1 of the text.

3. In the OpenStax College Physics textbook, read the first part of Chapter 32 (Medical Applications of Nuclear Physics) up through and including Section 32.4 (Food Irradiation). Based on that reading, answer each of the questions below, in about 30-50 words each. [a] [b] How do the units rem, rad, and Ci (curie) mathematically convert […]

Give the marginal effect of an increase in x on y when x is equal to 25, 50, 75. Explain why the marginal effect changes, both mathematically and intuitively.

Present your results in a table. Create a figure that includes a scatter plot of your x and y and also shows the predicted probability. Tell us what you can interpret from the coefficient. Give the marginal effect of an increase in x on y when x is equal to 25, 50, 75. Explain why […]

Describe an auto-transformer starter. From the expression for power input per phase (ec torque) show that for a turns ratio n of 4-§ : 1 , for the auto-transformer. VS V R„ • the power input to the motor/phase = ‘- n2z 2 P direct on-line torque 3 • the motor starting torque = • using a star/delta starter the motor starting torque is the same as the auto-transformer above.

5 6. (i) Describe an auto-transformer starter. From the expression for power input per phase (ec torque) show that for a turns ratio n of 4-§ : 1 , for the auto-transformer. VS V R„ • the power input to the motor/phase = ‘- n2z 2 P direct on-line torque 3 • the motor starting […]