Forum

Give detailed paragraph of golgi body

What happened to the cell if cell is in hypertonic solution?? 

What happened if cell do not have cell membrane?? 

Why do we called lysosomes as susideble bags? 

cell cycle and cell division

What is the difference between meiosis and mitosis 

Accounts

How is goodwill calculated in partnership accounts?

Life processes

What do you mean by life processes? Explain with examples.

JEE Mains (Gravitation)

Two bodies of masses m and 4m are placed at a distance r. The gravitational potential at a point on the line joining them where the gravitational field is zero is

(a) -6Gm/r

(b) -9Gm/r

(c) Zero

(d) -4Gm/r

JEE Mains (Gravitation)

A geostationary satellite orbits around the earth in a circular orbit of radius 36,000km. Then, the time period of a spy satellite orbiting a few hundred km above the earth’s surface (R =6,400km) will approximately be

(a) (l/2)hr

(b) 1 hr

(c) 2 hr

(d) 4 hr

JEE Mains (Gravitation)

A simple pendulum has a time period T₁ when on the earth’s surface, and T₂ when taken to a height R above the earth’s surface, where R is the radius of the earth. The value of T₂/T₁ is

(a) 1

(b) 3

(c) 4

(d) 2