Attempt all question:
Answers
1, Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object
2, Cohesion or cohesive attraction or cohesive force is the action or property of like molecules sticking together, being mutually attractive
please mark me as brainliest
Answer:
a. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares.
b. Cohesion, in physics, the intermolecular attractive force acting between two adjacent portions of a substance, particularly of a solid or liquid. It is this force that holds a piece of matter together. Intermolecular forces act also between two dissimilar substances in contact, a phenomenon called adhesion.
c.1 . A size, amount, etc. that is found by measuring.
2.The act or process of measuring something.
d. 1 : the exterior or upper boundary of an object or body on the surface of the water the earth's surface.
2 : a plane or curved two-dimensional locus of points (such as the boundary of a three-dimensional region) plane surface surface of a sphere.
e. 1. The melting point at which ice — a solid — turns to water — a liquid — is 32°F (0°C).
2. Water boils at 212 degrees Fahrenheit (100 degrees Celsius).
f. 1.Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.
2. Opposes motion, hence more energy is needed to overcome friction.
3. Noise production in machines is irritating as well as leads to energy loss.
g. Two characteristics of a unit are:
Two characteristics of a unit are:It should be of convenient size.
Two characteristics of a unit are:It should be of convenient size.It must be universally accepted i.e. its value must remain the same at all places and at all times.
h. Basic measurements: mass (weight), distance or length, area, and volume (liquid or grain measure).
I. The smallest unit into which a substance can be divided without changing its chemical nature.
j. The Four Fundamental Forces of Nature are Gravitational force, Weak Nuclear force, Electromagnetic force and Strong Nuclear force.