Question 751:

• JAMB 1993

Which of the following are produced after a nuclear fusion process? i. one heavy nucleus. ii. neutrons^-1. iii. protons. iv. Energy.

A. I and ii
B. I and iv
C. Ii and iii
D. Ii and iv

Question 752:

• JAMB 1993

An element X of an atomic number 88 and mass number 226 decays to form an element Z by emitting two beta particles and an alpha particle. Z is represented by

A. \(^{222}_{82}Z\)
B. \(^{222}_{88}Z\)
C. \(^{226}_{86}Z\)
D. \(^{226}_{80}Z\)

Question 753:

• JAMB 1993

The kinetic theory of photoelectron liberated from a metallic surface depends on the

A. Intensity of the incident radiation
B. Time duration of the incident radiation
C. Temperature of the incident radiation
D. Frequency of the incident radiation

Question 754:

• JAMB 1993

The diagram above shows a velocity time graph representing the motion of a car. Find the total distance covered during the acceleration and retardation of the motion

A. 75m
B. 150m
C. 300m
D. 375m

Question 755:

• JAMB 1993

In the fig above,A lever of length 200m is used to lift a load of mass 180kg. The pivot at P is 20m from the load. what minimum force F must be applied at the end of the lever [g = 10ms^-2]

A. 9N
B. 18N
C. 20N
D. 200N