Question

FILL IN THE BLANKS. 1. Mechanics is the branch of Physics which deals with ________. 2. A body is said to be possessing uniform motion if it undergoes _______ displacement in _______intervals of time. 3. Statics is a sub branch of mechanics which deals with bodies at ______. 4. Dynamics is a sub branch of mechanics which deals with bodies in ______. 5. A body is said to be at rest if it does not change its _______ with respect to the surroundings. 6. The reference point from which the distance of a body is measured is called__________. 7. Distance is the ______ path followed by a body between two points. 8. Displacement is the ______ distance between two points. 9. Area under velocity – time graph gives _____. 10.Slope of the velocity – time graph gives _____. 11.Velocity is the ratio of the _____ to the time taken. 12.Speed is the ratio of the _______travelled to the time taken. 13.A quantity which can be completely represented by magnitude and direction is called _______. 14.A quantity which can be completely represented by magnitude alone is called _____. 15.A point object is one whose size is_________ as compared to the distance it moves​

Answer 1

Answer:

1.1 Thales of Miletus. The earliest known discovery of electricity comes in 585 BC in a statement written by Thales of Miletus. Thales recognized the attractive powers of amber rubbed with animal fur as well as iron to lodestone.

Answer 2

$\huge\underbrace\purple{\dag AnsWeŘ\dag}$

Let the digit at units place be x and the digit at ten's place be y. Then,

Number =10y+x

According to the given conditions, we have

10y+x=8(x+y)+1⇒7x−2y+1=0

and, 10y+x=13(y−x)+2⇒14x−3y−2=0

By using cross-multiplication, we have

−2×−2−(−3)×1

x

=

7×−2−14×1

−y

=

7×−3−14×−2

1

⇒

4+3

x

=

−14−14

−y

=

−21+28

1

⇒

7

x

=

28

y

=

7

1

⇒x=

7

7

=1 and y=

7

28

=4

Hence, the number =10y+x=10×4+1=41