10 15 20 25 30 35 40 45 50 55 60 55
60
Specially designed circular venire scale is used by a spectrometer. Main scale is marked by 1° and the vernier
scale has 60 divisions marked by 5 divisions. The scale reading shown is
1. 46° 12'
2. 47° 20
3. 48° 30°
4. 50° 45°
5. 550 50
65
70
Cine

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.