Question

please solve it and help me don't give wrong answer​

Answer 1

1.- Similarity is that both the graphs shows uniform acceleration and dissimilarity is that in the irst graph the object starts from rest whereas in the second graph the object has some initial velocity.

2.- Length- 1.5cm

Speed- 2πL/60s

2π×1.5/60s

π×1.5/30s(2 cuts 60 and makes it 30)

ans-0.157cm/s

3.-Motion from O to A; u = 0, t = 2 sec, s = 20 m

Acceleration (a) = ?

s = ut + 1/2 at^2

(Using the 2nd equation of motion)

⇒20 = 0 + 1212 x a x (2)^2

⇒ 2a = 20

⇒ a = 10m/s^2

Motion from O to B

u = 0, S = (20 + 160) = 180 m,

t = 2 + 4 = 6 sec, a = ?

Again,

s = ut + 1212 at^2

180 = 0 + 1212 x a x (6)^2

180 = 18a

⇒ a = 10m/s2

This shows that body is moving with constant

acceleration.

Motion from O to C,

u = 0, t = 7 sec, a = 10 m/s^2 v = ?

v = u + at

⇒ y = 0 + 10 x 7

⇒ v = 70 m/s

4.- Accelaration(a)=-6m/s^2

Time(t)=2s

Final velocity(v) =0m/s

v=t+a

0=u-6×2

u=12m/s

s=ut+1/2×at^2

s=12×2+1/2×-6×4

s=12

5.- Q1=Object A- Uniform

Object B- NonUniform

Object C- Nonuniform

Q2=Maximum- Object C

Minimum- Object A

Q3=119 metre

6.-In the absence of golgi apparatus lysosomes would

not would not be produced and the accumulation of

dead and damaged organelles and molecules in cell

would ultimately result in the crll to death.

7.-Increase in Productivity

The Right Man in the Right Place

Dexterity and Skill

Inventions are facilitated

8.-When person drinks concentrated salt solution

then it eventually reaches to intestine. As salt

solution contains more solutes than nearby tissues,

then the water from those tissues start moving

to intestine. This process is endosmosis in which the

water molecules move from lower solute

concentration to higher solute concentration

through intestinal wall. Intestine cannot tolerate

strain due to extra incoming water and hence, the

extra water is spilled out through vomiting.

9.-Vacuoles are like storage bubbles which are found

mostly in plant cells. They occupy most of the

portion of plant cells. These are used for storage

of food or water. They also store toxic metabolic

by-products or end products of plant cells. Such

vacuoles are thrown out of the cell by exocytosis.

Osmotic pressure and turgidity are maintained by

vacuoles due to the presence of cell sap.

10.-Mitochondria are known as the “powerhouse of

the cell.” The organelle that is responsible for the

production of energy in a cell is the mitochondria.

This is the most vital part of the cell as it takes the

food and makes energy for the other parts of the

cell.