Question 4911:

The half - life of a radioactive element is 9 days. What fraction of atoms has decayed in 36 days?

A. \(1 / 16\)
B. \(1 / 4\)
C. \(1 / 2\)
D. \(15 / 16\)

Question 4912:

• JAMB 2022

Which of these is a derived unit?

A. Kilogram
B. Metre
C. Newton
D. Second

Question 4913:

• JAMB 2022

A bar magnet is divided into two pieces, which of the following statement is correct?

A. Two new magnets are created
B. The magnetic field of each separate piece becomes stronger
C. The electric field is created
D. The bar magnet is demagnetized

Question 4914:

• JAMB 2022

The vapour pressure?

A. Increases non-linearly with measuring temperature
B. Increases linearly with increasing temperature
C. Decreases linearly with increasing temperature
D. Decreases non-linearly ith measuring temperature

Question 4915:

• JAMB 2022

The potential energy in an elastic string of force constant k, which has an extension X is?

A. KX
B. KX\(^{2}\)
C. ½KX\(^{2}\)
D. ½K