Given these events:
(1) Calcium ions combine with tropomyosin.
(2) Calcium ions combine with troponin.
(3) Tropomyosin pulls away from actin.
(4) Troponin pulls away from actin.
(5) Tropomyosin pulls away from myosin.
(6) Troponin pulls away from myosin.
(7) Myosin binds to actin.
Choose the arrangement that lists the events in the order they occur during muscle contraction.
a. 1,4,7
b. 2,5,6
c. 1,3,7
d. 2,4,7
e. 2,3,7
A transistor has a current gain of 150 and a base current of 30μA30 \mu \mathrm{A}30μA. What is the collector's current?
What is a dipole moment? Give four examples of molecules that possess dipole moments, and draw the direction of the dipole as shown in this section.
Assume nameListBox is a ListBox control. Write code that reads the selected item from the ListBox. Be sure to prevent an exception from occurring in case no item has been selected.
nameListBox