Why is earth flattened at poles?

Q: What is surface tension?

A: Surface tension is the attractive force exerted by the molecules below the surface of a liquid,…

Q: What is inclined plane?

A: Given; Define the inclined plane and its use,  with two examples where it is used ?

Q: The deepest point in the ocean is in the Mariana Trench,about 11 km deep. The pressure at the ocean…

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Q: An octopus uses one sucker of diameter 2.86 cm on each of the two shells of a clam in an attempt to…

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Q: How does water pressure 1 m beneath the surface of a lake compare with water pressure 1 m beneath…

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Q: A vertebra is subjected to a shearing force of 581 N. Find the shear deformation, taking the…

A: Write the given values with the suitable variables. F=581 Nh=8.99 cm=0.0899 md=4.14 cm=0.0414 m…

Q: How does water pressure 1m below the surface of a small pond compare with water pressure 1m below…

A: Pressure is given by,

Q: Where is the center of mass of Earth’s atmosphere?

A: Imagine all of the masses in a collection of masses fixed, so they could no longer move with respect…

Q: Calculate the pressure on the top lid of a chest buried under 4.50 meters of mud with density 1.75…

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Q: Draw a cross-section and explain how quicksand forms.

A: A constant flow of water causes the sand to get wet. Since water cannot escape it liquifies the…

Q: Why does water have high surface tension but low viscosity ?

A: Surface tension (T) is the property of a liquid to keep its volume (V) minimum.  The viscosity of…

Q: The speed of the river flow is affected by the slope and the volume of water   TRUE OR FALSE

A: Answer:-  True    The speed of the river flow is affected by the slope and the volume of water is…

Q: Why does your hair stand up when you go down a slide?

A: The hair stand up on going down the slide because of static electricity. On going down the slide,…

Q: When the branch of a tree is shaken , fruit falls. Why?

A: Tree and the hanging fruit are in the state of rest initially. When the branch is shaken vigorously,…

Q: A body with a weight of 100N and across -sectional area of 0.1m 2, so the magnitude of the pressure…

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Q: Calculate the pressure on the top lid of a chest buried under 4.00 m of mud with density equal to…

A: GivenHeight of mud, h1=4 mDensity of mud, ρ1=1.75×103 Kg/m3Depth of lake of water, h2=10 m

Q: What is the greatest height of the rock as measured from the base of the cliff?

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Q: What is viscosity? What is the cause of it in liquids and in gases? Do liquids or gases have higher…

A: Given: viscosity

Q: What happens to the height of a tsunami when its velocity is doubled?

A: It is known that: H=kV2   Where, k= A constant H=Height V=Velocity

Q: Determine the elongation of the rod in the figure below if it is under a tension of 4.5 × 10° N. cm…

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Q: Imagine a square column of the atmosphere, 1 m on a side, that extends all the way to the top of the…

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Q: How does slipping occur?

A: Describing The reason of slipping

Q: tensioncompression that strengthens an arch that supports a load?

A: An arch is a curved structure, it consists of two forces i.e., tension and compression force.…

Q: Determine the minimum area of a sheet of ice that is 0.60 meter thick if it is to support a 300-kg…

A: Write the given values with suitable variables. t=0.6 mm=300 kgρi=920 kg/m3ρw=1020 kg/m3 Here, t, m,…

Q: A dike in Holland springs a leak through a hole of area 1cm squared at a depth of 2m below the water…

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Q: If the rotor area becomes two times power available in the wind becomes four times. Select one:

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Q: At what depth in the ocean will the absolute pressure be six times the absolute pressure at the…

A: Dear student The absolute pressure is given by sum of atmospheric lressure and gauge pressure. And…

Q: Calculate the pressure on the top lid of a chest buried under 4.00 m of mud with density equal to…

A: Scenario - A chest is buried deep in river bed. Mud and water above it exerts pressure on top of its…

Q: Why is water wet?

A: Water can be said to be in the sense that water is a liquid.

Q: What is cause of surface tension?

A:

Q: Why doesn’t a hummingbird soar like an eagle and an eagle flap its wings like a hummingbird?

A: The wings size of a hummingbird is smaller than the wing size of an eagle, so hummingbird can flap…

Q: How does water pressure 1 m below the surface of a small pond compare with water pressure 1 m below…

A: The pressure (P) at depth h is given as, Here, ρ is the water’s density and g is the gravitational…

Q: What is breaking stress?

A: In simple terms, the stress applied to a material is defined as the force per unit area applied to…

Q: As height increases, so does...

A: Height is related to the potential energy of an object. increasing height is the result of gaining…

Q: What is shear stress?

A: A stress, which acts coplanar with cross section of material is known as shear stress. In other…

Q: Distinguish between thrust and pressure.

A: Thrust can be defined as the force exerted by a body which acts perpendicular to its surface.Its…

Q: How does pressure change with depth in a water column?

A: Pressure at a depth P=WA=ρgVA=ρgh

Q: What do you think caused the motion of the 356 m tall skyscaper shaking?

A: Objective: To determine the cause or reason for the motion of the shaking of 356 m tall skyscraper…

Q: How does pressure vary with water depth?

A: Pressure increases with water depth.

Q: What force must be withstood by a vertical dam 80 ft. long and 20 ft. deep?

A:

Debye Theory of Solids

In solid-state physics, debye theory is used to estimate the phonons contributing to the specific heat capacity in a solid. It explains that the specific heat is a consequence of the vibrations of the atomic lattice of the solid, which is in contrast to the Einstein model. In the Einstein model, solids are treated as independent, non-interacting quantum harmonic oscillators. This model clearly explains the low-temperature dependence of the heat capacity, which is proportional to T3. This is known as Debye T3 law.