Question # 1

A temperature rise in the environment disturbs life called:

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Air pollution

Land pollution

Noice pollution

Thermal pollution

A large water reservoir keeps the temperature of nearby land moderate due to

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Low temperature of water

Low specific heat of water

Less absorption of heat

Large specific heat of water

Parallel forces are those whose:

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^{Times of action are parallel}

Points of action are different

More than one forces

All of the given option

Convection of heat is the process of heat transfer due to the

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

In prefix form, 0.000001 would be expressed as.

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0.1 mm

0.01 mm

0.001 mm

0.0001 mm

Mass-Energy equation was given by:

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Newton

Einstein

Joule

Pascal

Which surface is best reflector of heat?

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dull black surface

coloured surface

white surface

shining slivered surface

Which parameter remain same every where?

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Force

Mass

Weight

Velocity

Tan 𝜽 is equal to:

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Perpendicular/Hypotenuse

Base / Perpendicular

Base/Hyp

Perpendicular/Base

Mass of earth is approximately _________

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3.7 x 10²⁴ kg

25.94 kg

6.0 x 10²²kg

6 x 10²⁴kg

The altitude of geostationary orbits in which communication satellites are launched above the surface of the Earth.

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850 km

1000 km

6400 km

42,300 km

If Fx and Fy are rectangular components of vector F, then its direction is determined by the relation

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θ = sin-1 Fv/Fx

θ = tan-1 Fx/Fy

θ = tan Fx/Fy

θ = tan Fy/Fx

The main source of energy in the unierse is:

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Moon

Stars

Sun

Planets

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9th Class Physics English Medium KPK Boards Online Mcqs MCQs With Answers

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