Explanation

The stability of a racing car is increased by lowering its center of gravity, which reduces the risk of rollover or loss of control.

This can be achieved through design elements like a lower ride height, a wider stance, or a lower seating position for the driver.

Explanation

• KARI (Korea Aerospace Research Institute) is the space agency of South Korea.
• KARI was established in 1989.
• It is responsible for the development of spacecraft, launch vehicles, and satellites.

Explanation

Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens.

The concave lens are known as diverging lenses, as the rays diverge after falling on the concave lens.

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RY24012023

Explanation

When light shines on a photovoltaic (PV) cell – also called a solar cell – that light may be reflected, absorbed, or pass right through the cell.

The PV cell is composed of semiconductor material; the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal.

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RY24012023

Explanation

 When a body moves against the force of friction on a horizontal plane, the work done by the body is negative.

This is because work is defined as the dot product of force and displacement,

And when moving against friction, the force of friction acts in the opposite direction to the displacement of the body,

Resulting in an angle of 180 degrees between them. 

Explanation

 Energy = Power × Time = 40 W × 3600 s = 144000 J

Explanation

Stokes' law applies to small spherical particles in viscous fluids. 

Stokes' law describes the drag force exerted on a spherical particle moving slowly through a viscous fluid.

And it is only valid for small, spherical particles moving in a laminar flow with low Reynolds numbers

Where the viscosity of the fluid plays a significant role. 

Explanation

The correct answer is:  All of the above

A complete revolution corresponds to an angular displacement of:

• 360°

• $2\pi$ radians

So, for 2 complete revolutions:

• Degrees: $2\times 360°=720°$

• Radians: $2 times 2pi = 4pi$ radians

• Approximate radians:

  $$4\pi \approx 4\times 3.14=12.56\text{ radians (rounded to 12.6)}$$

Explanation

Kinetic energy formula: KE = ½ mv²

Let initial KE = ½ * m * v²  

New KE = ½ * (3m) * (2v)²  

= ½ * 3m * 4v²  

= 6mv²  

Now divide new KE by original KE:  

(6mv²) / (½mv²) = 12 times

Explanation

A diode is a semiconductor device that allows current to flow in one direction only.

It effectively acting as a one-way valve for electrical current.

This property makes it useful in various electronic circuits for controlling the direction of current flow.