Use the triple energy window method to calculate the scatter-free technetium-99m counts for a point in an image which has 10,000 total photopeak counts in a 20% energy window. 5% scatter windows are placed above and below the photopeak (centered at 120 kev and 160 kev) and contain 1000 counts and 100 counts respectively.

Find the vertex(use the completing the square method), findthe x- and y-intercepts, and sketch the graph offunction. y = 2x2 + 4x - 1

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Which subatomic particle has a negative charge