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BidishaKashayap1333
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Joined: Oct 11, 2021
Last seen: Jul 27, 2023
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Topics: 2174 / Replies: 0
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Topic
Giving reasons state the reading on a spring balance when it is attached to a floating block of wood which weights 50 g in air.
4 years ago
Forum
Gravitation
Replies: 0
Views: 265
Topic
A body floats in kerosene of density 0.8 x 10^3 kg/m^3 up to a certain mark. If the same body is placed in water of density
4 years ago
Forum
Gravitation
Replies: 0
Views: 277
Topic
Two different bodies are completely immersed in water and undergo the same loss in weight. Is it necessary that their weights in air should also be the same? Explain.
4 years ago
Forum
Gravitation
Replies: 0
Views: 130
Topic
If two equal weights of unequal volumes are balanced in air, what will happen when they are completely dipped in water? Why?
4 years ago
Forum
Gravitation
Replies: 0
Views: 212
Topic
An elephant weighing 40,000 N stands on one foot of area 1000 cm^2 whereas a girl weighing 400 N is standing on one ‘stiletto’ heel of area 1 cm^2.
4 years ago
Forum
Gravitation
Replies: 0
Views: 99
Topic
How does a boat float in water? (b) A piece of steel has a volume of 12 cm^3, and a mass of 96 g. What is its density:
4 years ago
Forum
Gravitation
Replies: 0
Views: 278
Topic
What are fluids? Name two common fluids. (b) State Archimedes’ principle. (c) When does an object float or sink when placed on the surface of a liquid?
4 years ago
Forum
Gravitation
Replies: 0
Views: 220
Topic
Define pressure. (b) What is the relation between pressure, force and area? (c) Calculate the pressure when a force of 200 N is exerted on an area of:
4 years ago
Forum
Gravitation
Replies: 0
Views: 96
Topic
State the principle of flotation. (b) A floating boat displaces water weighing 6000 newtons. (i) What is the buoyant force on the boat? (ii) What is the weight of the boat?
4 years ago
Forum
Gravitation
Replies: 0
Views: 94
Topic
Define buoyant force. Name two factors on which buoyant force depends. (b) What is the cause of buoyant force? (c) When a boat is partially immersed in water, it displaces 600 kg of water.
4 years ago
Forum
Gravitation
Replies: 0
Views: 262
Topic
Write down an equation that defines density. (b) 5 kg of material A occupies 20 cm^3 whereas 20 kg of material B occupy 90 cm^3. Which has the greater density A or B?
4 years ago
Forum
Gravitation
Replies: 0
Views: 192
Topic
An object weighs 500 grams in air. This object is then fully immersed in water. State whether it will weigh less in water or more in water. Give reason for your answer.
4 years ago
Forum
Gravitation
Replies: 0
Views: 134
Topic
Calculate the density of an object of volume 3 m^3 and mass 9 kg. State whether this object will float or sink in water. Give reason for your answer.
4 years ago
Forum
Gravitation
Replies: 0
Views: 280
Topic
A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160 cm^2.
4 years ago
Forum
Gravitation
Replies: 0
Views: 235
Topic
A pressure of 10 Pa acts on an area of 3.0 m^2. What is the force acting on the area? What force will be exerted by the application of same pressure if the area is made one-third?
4 years ago
Forum
Gravitation
Replies: 0
Views: 182
Topic
Name these forces : (a) the upward push of water on a submerged object (b) the force which wears away two surfaces as they move over one another
4 years ago
Forum
Gravitation
Replies: 0
Views: 253
Topic
Why do camels have large flat feet?
4 years ago
Forum
Gravitation
Replies: 0
Views: 104
Topic
Why does a ship made of iron and steel float in water whereas a small piece of iron sinks in it?
4 years ago
Forum
Gravitation
Replies: 0
Views: 97
Topic
Explain why, buildings and dams have wide foundations.
4 years ago
Forum
Gravitation
Replies: 0
Views: 310
Topic
Explain why, a nail has a pointed tip.
4 years ago
Forum
Gravitation
Replies: 0
Views: 105
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