Answer: Acute angle When a liquid wets a solid surface, the adhesive force between the liquid and walls of the vessel are more than cohesive... View Article
When wetting agents like soap or dyes are added to water, the angle of contact becomes small so that these may penetrate well and become effective.... View Article
The most prominent theory of the origin of the universe is the Big Bang Theory. The Big Bang Theory is the leading explanation about how the... View Article
Astronomy is defined as the scientific study of planets and other heavenly bodies. It is one of the oldest sciences and is based on the... View Article
One parsec is _____ light years.  Answer: 3.26 Explanation: Parsec is the unit of length used to measure the large distances to astronomical... View Article
Milky Way is the second-largest galaxy in the Local Group. The Milky Way is about 1,000,000,000,000,000,000 km (about 100,000 light years or... View Article
A galaxy is defined as a large group of stars, gas, and dust bound together by gravity. Our galaxy is known as Milkyway because it appears as a... View Article
The presence of bright sunlight makes the stars invisible during the daytime. The presence of bright sunlight causes the stars to be invisible... View Article
The expansion of the universe was first observed by Edwin Hubble. The explanation for the expansion of the universe was given by Edwin Hubble by... View Article
A light-year is defined as the measurement of length or the distance light travels in a vacuum in a year. One light-year is close to 6 trillion... View Article
Answer: (3) Beta rays. Electromagnetic waves are also known as EM waves that are formed when an electric field comes in contact with the... View Article
Solar radiation is radiant (electromagnetic) energy from the sun. It provides light and heat for the Earth and energy for photosynthesis. This... View Article
Shutter is opened while clicking the camera. It is a device that allows light to pass for a determined period, exposing the photographic film or... View Article
The distance of the lens from the film can be changed using a Focussing ring. The camera lens has a fixed focal length. If the distance of the... View Article
A magnifying glass forms inverted image real image virtual image Both 1 and 2 Answer: Option 3 Explanation: A magnifying glass makes use... View Article
