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Fatima Nadeem
Subject: Science
, asked on 22/2/18
Qno. 148 plz explain the answer in detail..
Q148. The fraction of a floating body of volume V
_{0}
and density d
_{0}
above the surface of liquid of density d will be
(a)
$\frac{\mathrm{d}}{{\mathrm{d}}_{0}}$
(b)
$\frac{{\mathrm{d}}_{0}}{\mathrm{d}}$
(c)
$\frac{\mathrm{d}-{\mathrm{d}}_{0}}{\mathrm{d}}$
(d)
$\frac{{\mathrm{d}}_{0}}{\mathrm{d}-{\mathrm{d}}_{0}}$
Answer
1
Sms
Subject: Science
, asked on 21/2/18
In the experiment to find the density of SOLID object, the object should be lighter or denser than water? Why
Answer
2
Sms
Subject: Science
, asked on 21/2/18
In the experiment to find the density of a solid object, the object should be lighter or denser than water? Why?
Answer
1
Muskan
Subject: Science
, asked on 20/2/18
If the mass of the earth becomes half and its radius becomes twice then what will be the gravitational acceleration.
Answer
1
Shrutee Sucharita
Subject: Science
, asked on 19/2/18
Pls answer 24 no. Q. Pls fast its urgent
Q.24. An iron ball of density
$7.8g/c{m}^{2}$
and volume 200
$c{m}^{3}$
is totally immersed in water. Calculate the upthrust on it.
[Ans. 1.96 N]
Answer
1
Manasvi Jindal
Subject: Science
, asked on 18/2/18
Derive an expression to show that acceleration due to the gravity is independent of mass of the object
Answer
1
Chirag Mohitkar
Subject: Science
, asked on 18/2/18
There are two planets A and B of masses m
_{1}
and m
_{2}
respectively. They revolve around the sun in circular orbit. The orbital radius of A from the sun is twice that of orbital radius of B. The mass of A is twice that of mass B. Compare the forces of gravitation between A to Sun and B to Sun.
Answer
3
Advait.n
Subject: Science
, asked on 17/2/18
determine the grvitational force btw a planet of mass 6*10
^{24}
kg and an object of mass 1kg
placed on its surface .Let the radius be 6*10
^{6}
m and G=6*10^-11
pls dont give any links
Answer
3
Devesh Kumar Biswal
Subject: Science
, asked on 17/2/18
Please solve question 11
Q.11.An object of mass 2 kg and density 8000 kg/
${m}^{3}$
is completely immersed in a liquid of density 800 kg/
${m}^{3}$
. Find the force of buoyancy on it?
Answer
1
Anushka Mishra
Subject: Science
, asked on 15/2/18
Please solve this:
106. You are given a sphere of radius 2 cm. If you are asked to select the best suited spring batatex to determine its weight, then out of the following which one would you prefer and why?
( The sphere is made up of an alloy of density 7000 kg/m
^{3}
.)
(a) Range : 0-1000 g wt; Least count : 5 g wt
(b) Range: 0-500 g wt: Least count : 2.5 g wt
(c) Range : 0-250 g wt; Least count : 2.5 g wt
(d) Range : 0-100 g wt; Least count ; 1 g wt.
Answer
1
Anushka Mishra
Subject: Science
, asked on 15/2/18
Please answer this and explain why question91
Q91. The principle of floatation states that
(a) Weight of body is less than upward thrust of liquid
(b) Weight of body is equal to the upward thrust of liquid
(c) Weight of body is greater than upward of liquid
(d) Weight of body is equal to the downward thrust of liquid
Answer
2
Anushka Mishra
Subject: Science
, asked on 15/2/18
Solve this :
70. When all ice floating in water melts the level of water in container
(a) falls (b) rises
(c) remains unchanged (d) none of these
71. A jet plane flies in air because
(a) Streamlined flow of air causes lift
(b) upward thrust of air balances its weight
(c) No gravity acts on plane
(d) None of these
Answer
3
Shreyas
Subject: Science
, asked on 13/2/18
Road accidents at high speeds are very much worse than accidents at low speed??
Answer
1
Harshit Singh Avengers
Subject: Science
, asked on 13/2/18
what is buoancy ?
Answer
3
Harshit Singh Avengers
Subject: Science
, asked on 13/2/18
what is the importance of universal law of gravitation ?
Answer
3
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What are you looking for?

Q148. The fraction of a floating body of volume V

_{0}and density d_{0}above the surface of liquid of density d will be(a) $\frac{\mathrm{d}}{{\mathrm{d}}_{0}}$ (b) $\frac{{\mathrm{d}}_{0}}{\mathrm{d}}$

(c) $\frac{\mathrm{d}-{\mathrm{d}}_{0}}{\mathrm{d}}$ (d) $\frac{{\mathrm{d}}_{0}}{\mathrm{d}-{\mathrm{d}}_{0}}$

Q.24. An iron ball of density $7.8g/c{m}^{2}$ and volume 200 $c{m}^{3}$ is totally immersed in water. Calculate the upthrust on it.

[Ans. 1.96 N]

_{1}and m_{2}respectively. They revolve around the sun in circular orbit. The orbital radius of A from the sun is twice that of orbital radius of B. The mass of A is twice that of mass B. Compare the forces of gravitation between A to Sun and B to Sun.^{24}kg and an object of mass 1kgplaced on its surface .Let the radius be 6*10

^{6}m and G=6*10^-11pls dont give any links

Q.11.An object of mass 2 kg and density 8000 kg/${m}^{3}$ is completely immersed in a liquid of density 800 kg/${m}^{3}$. Find the force of buoyancy on it?

106. You are given a sphere of radius 2 cm. If you are asked to select the best suited spring batatex to determine its weight, then out of the following which one would you prefer and why?

( The sphere is made up of an alloy of density 7000 kg/m

^{3}.)(a) Range : 0-1000 g wt; Least count : 5 g wt

(b) Range: 0-500 g wt: Least count : 2.5 g wt

(c) Range : 0-250 g wt; Least count : 2.5 g wt

(d) Range : 0-100 g wt; Least count ; 1 g wt.

Q91. The principle of floatation states that

(a) Weight of body is less than upward thrust of liquid

(b) Weight of body is equal to the upward thrust of liquid

(c) Weight of body is greater than upward of liquid

(d) Weight of body is equal to the downward thrust of liquid

Solve this :70. When all ice floating in water melts the level of water in container

(a) falls (b) rises

(c) remains unchanged (d) none of these

71. A jet plane flies in air because

(a) Streamlined flow of air causes lift

(b) upward thrust of air balances its weight

(c) No gravity acts on plane

(d) None of these