TRITION х
YEAR 10 FOODS AND NUTRITION X
Classwork for YEAR 10
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ONLINE JUNE UNIFIED TEST 201 X
docs. google. com/forms/d/e/1FAIpQLSeEZrgMSYBStOq sBJ-7DqFr6XLgAZXJjPwVuq_LzkiQu83osA /formResponse
1. Determine the value of resistor Rx in the diagram below: Given that R1 = 4 12,
2 =2 12 and R3 =12
4
R,
D
B
20
A. 0.52

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?