Waec Physics 2017 Past Questions and Answers

Question 51:

• WAEC 2017

Radio wave

Micro wave

Infrared wave

P

Q

R

Gamma Ray

The table above shows the components of electromagnetic spectrum in order of increaasing frequency.Which of the following sets correctly identifies P, Q, R respectively?

A. Visible, ultraviolet, X-ray
B. X-ray, visible, ultraviolet
C. Ultraviolet, visible, X-ray
D. X-ray, ultraviolet, visible

Question 52:

• WAEC 2017

A particle is dropped from a vertical height h and falls freely for a time t. With the aid of a sketch, explain how h varies with \(t^2\)

Question 53:

• WAEC 2017

A particle is projected horizontally at 15ms\(^{-1}\) from a height of 20m. Calculate the horizontal distance covered by the particle just before hitting the ground. [g= 10ms\(^{-2}\)]

Question 54:

• WAEC 2017

List three phenomena which can be explained by the molecular theory of matter.

Question 55:

• WAEC 2017

A spiral spring has a length of 14cm when a force of 4N is hung on it. A force of 6N extends the spring by 4cm. Calculate the unstretched length of the spring