Question 4141:

• JAMB 2021

If the stress on a wire is 10\(^{7}\)NM\(^{-2}\) and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young's modulus of the wire is?

A. 5.0 x 10\(^{-4}\)Nm\(^{-2}\)
B. 5.0 x 10\(^{-5}\)Nm\(^{-2}\)
C. 2.0 x 10\(^{-8}\)Nm\(^{-2}\)
D. 2.0 x 10\(^{9}\)Nm\(^{-2}\)

Question 4142:

• JAMB 2021

If the fraction of the atoms of a radioactive material left after 120 years is 1/64, what is the half-life of the material?

A. 24 years
B. 20 years
C. 10 years
D. 2 years

Question 4143:

• JAMB 2021

A certain radioactive source emits radiation that was found to be deflected by both magnetic and electric fields. The radiation is?

A. Beta rays
B. Gamma rays
C. X-rays
D. Ultra-violet rays

Question 4144:

• JAMB 2021

The inner diameter of a test tube can be measured accurately using a?

A. Micrometer screw gauge
B. Pair of dividers
C. Meter rule
D. Pair of vernier calipers

Question 4145:

• JAMB 2021

Two bodies have masses in the ratio3:1. They experience forces which impart to them, acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced

A. 1:4
B. 2:1
C. 2:3
D. 2:5