Chapter 1

Question 1

How much do we know about the universe? (percentage)

Answer 1

4%

Question 2

General physics is divided as

Answer 2

Mechanics and Properties of matter

Question 3

Define Mechanics

Answer 3

The branch of physics known as mechanics is concerned with the investigation of motion under the influence of forces or displacements, as well as the subsequent consequences of the bodies on their surroundings.

Question 4

What are the two branches of Mechanics?

Answer 4

Statistics and Dynamics

Question 5

What are the two types of properties of matter?

Answer 5

General property and Special property

Question 6

Examples of General properties

Answer 6

Weight, resistance, i cant translate the other two

Question 7

Examples of Special properties of a solid material

Answer 7

Elasticity, rigidity, fragility etc

Question 8

What is the special properties of a liquid

Answer 8

Viscosity, surface tension

Question 9

What is the special properties of a gas

Answer 9

Viscosity

Question 10

Describe Osmosis

Answer 10

Osmosis is a process by which the molecules of a solvent pass from a solution of low concentration to a solution of high concentration through a semi-permeable membrane.

Question 11

Define Quasars

Answer 11

uasars are extremely powerful and distant active galactic nuclei

Question 12

Define pulsars

Answer 12

Pulsars are highly magnetized rotating neutron stars

Question 13

What are practical units

Answer 13

any of various electric and magnetic units selected for convenience as to size for use in actual practical measurements

Question 14

Examples of practical units

Answer 14

kilometer and micron

Question 15

Define light-year

Answer 15

the distance light travels in one year

Question 16

What is the International proto-type meter

Answer 16

the distance between two lines on a standard bar of 90 percent platinum and 10 percent iridium

Question 17

What is 1 astronomical unit in meters

Answer 17

1.495x10^8m

Question 18

The distance of 1 light year in meters

Answer 18

9.46x10^15m

Question 19

How many light years is 1 parsec

Answer 19

3.2616ly

Question 20

1 fermi unit is equal to

Answer 20

10^-15 meter

Question 21

1 X-ray unit is equal to

Answer 21

10^-11

Question 22

Dimension of poisson’s ratio

Answer 22

none

Question 23

Dimension of entropy

Answer 23

ML^2T^-2θ^-1

Question 24

Dimension of temperature gradient

Answer 24

θL^-1

Question 25

Unit of Self inductance

Answer 25

Henry(H)

Question 26

unit of electric dipole moment

Answer 26

coulomb-meter(C.m)

Question 27

Unit of capacitance

Answer 27

Farad(F)

Question 28

coefficient of viscosity unit

Answer 28

Poise,
Nsm^-2 (Newton-second per square meter) ,
Pas^-1

Question 29

Radius of gyration unit

Answer 29

m

Question 30

In what year was the theory of relativity invented

Answer 30

1905

Question 31

Who had a bird fetish and made a ship model based on it

Answer 31

Leonardo da vinci

Question 32

which theories did archimedes invent

Answer 32

lever theory and Archimedes’ principle

Question 33

What determines time’s unit (englishan’t)

Answer 33

Cs-133

Question 35

who proposed a heliocentric system

Answer 35

Copernicus on deez nuts

Question 36

Who’s the author of Philosophiae Naturalis Principia Mathematics

Answer 36

Isaac Newton

Question 37

in what year was the Philosophiae Naturalis Principia Mathematics published

Answer 37

1687

Question 38

What’s photon’s old name

Answer 38

Quanta

Question 39

Who named quanta

Answer 39

max planck

Question 40

In what year was quantum theory invented

Answer 40

1900

Question 41

Einstein noble prize year

Answer 41

1921