Physics JAMB

Mercury which is spilled onto a glass surface forms ball-like shapes because?

A. Mercury is a metal
B. The cohesive force between its molecules is greater than the adhesive force between mercury and glass molecules
C. The cohesive force between its molecules is less than the adhesive force between mercury and glass molecules
D. The viscosity of mercury is height

Correct Answer:

Option B – The cohesive force between its molecules is greater than the adhesive force between mercury and glass molecules

Explanation

In the case of small drops of mercury, the gravitational potential energy is negligible in comparison to the potential energy due to surface tension. Consequently, to keep the drop in equilibrium, the mercury drop’s surface tends to contract so that its surface area will be the least for a sphere and the drops will be spherical.

But in the case of bigger drops of mercury, the potential energy due to gravity is predominant over the potential energy due to surface tension. Consequently, to keep equilibrium, the mercury drop tends to assume minimum potential energy as possible, the drop becomes oval in shape and lower center of gravity.

Sunday

Share
Published by
Sunday
Tags: physics

Recent Posts

List of Universities Offering Veterinary Medicine in Nigeria

Veterinary medicine is the branch of medicine that deals with the prevention, diagnosis, and treatment…

3 months ago

List of Universities Offering Anthropology in Nigeria

Anthropology is the scientific study of human beings and their cultures. It encompasses a wide…

3 months ago

List of Universities Offering Sociology in Nigeria

Sociology is the scientific study of human society, culture, and behavior. It examines the social…

3 months ago

List of Universities Offering Social Work in Nigeria

Social Work is a profession dedicated to helping individuals, families, and communities to cope with…

3 months ago

List of Universities Offering Religious Studies in Nigeria

Religious studies is an academic discipline that explores the beliefs, practices, and history of various…

3 months ago

List of Universities Offering Public Administration in Nigeria

Public administration is the field of study and practice that focuses on the organization and…

3 months ago