Question

TT
(c) v
25. There
almos
on it
18. A planet of radius R =
1
x (radius of Earth) has the same
10
R
mass density as Earth. Scientists dig a well of depth
5
and lower a wire of the same length and of linear mass
density 10-3kgm into it. If the wire is not touching
anywhere, the force applied at the top of the wire by a
person holding it in place is (take the radius of Earth
6x10m and the acceleration due to gravity on Earth is
10 ms2)
(JEE (Advanced) 2014]
(a) 96N
(b) 108 N
(c) 120 N
(d) 150 N
19. If the height of a satellite from
escap
then
(a)
(c)
26. Pick
satelli
(a)
(b)
asked in JEE advanced (2014)​

Answer 1

Answer:

Since

7

is a prime number, it has no square factors and its square root cannot be simplified.

It is an irrational number, so cannot be exactly represented by

p

q

for any integers

p

,

q

.

We can however find good rational approximations to

√

7

.