Select the best terms from the drop-down menus that fit the nuclear medicine descriptions.

gamma-ray detection from tracers

assess disease progression, tissue function

a hybrid scan that involves nuclear medicine and X-ray imaging

radiation treatment near or within the tumor from implanted “seeds”

radiation treatment near or within the tumor from implanted “seeds”

Explanation:

The best expression that fits the term nuclear medicine is the use of radiation treatment near or within the tumor from implanted seeds.

Radiation treatment is one of the uses of nuclear chemistry. It has been employed in cancer treatment successfully over the years.

the velocity you are looking for is made up of two parts: horizontally velocity, vh, and its vertical velocity, vv. the actual velocity of the ball will be these two parts added together, and because velocity is a vector then they will need to be added vectorially.  

neglecting air resistance etc etc.,  

the horizontal velocity component will be constant (because there is no accelerating force in the horizontal direction.  

vh = 8 ms-1  

the vertical velocity component has an accelerating force: 'g'.  

using v = u +at where a = g = 9.81 ms-2.  

the vertical component of velocity, vv = 0 + gt = vv =9.81 x 2  

vv = 19.62 ms-1 . the zero appears because the virtical component of velocity at time t=0 is zero. remember, the ball was thrown horizontally.  

how fast it will be moving (it actual path (being a parabola )) will be the vector sum of these two.  

adding vectorally gives: -  

v = sqr root (8^2 + 19.62^2) = sqr root(64+384.9) = 21.18 or 21.2 ms-1