Explanation

• Drag force opposes an object's motion through a fluid, such as air or water.
• Drag force generally increases as the object's speed increases.
• At ordinary speeds, drag is often proportional to speed; at higher speeds, it is commonly proportional to the square of speed.

Last verified on 31-10-2026

Explanation

• Newton’s Second Law states that the net force equals mass multiplied by acceleration.
• Acceleration can be calculated by dividing the net force by the object's mass.
• The SI unit of acceleration is metres per second squared (m/s²).

Last verified on 31-10-2026

Explanation

• Power and Mass is a scalar quantity because it has only magnitude.
• Power describes the rate of doing work in physics.
• It is measured in watts (W).

Additional information:

• Scalar quantities include: mass, time, temperature, energy.
• Vector quantities include: displacement, velocity, acceleration, force.

Last verified on 17-06-2026

Explanation

When pressure = kPa and volume = L, use R = 8.314 L·kPa·mol⁻¹·K⁻¹.

This value is used in the Ideal Gas Law: PV = nRT.

Last verified on 09-07-2026

Explanation

• All electromagnetic waves (like light, X-rays, and radio waves) travel through a vacuum at the same constant speed.
• It is approximately 3 × 10⁸ meters per second.
• This speed is known as the speed of light in a vacuum.

Last verified on 31-10-2026

Explanation

Stress = Force / Area

Given:

Diameter = 12 mm, so Radius = 6 mm = 0.006 m

Force = 10,000 N

Length = 11 m (not needed for stress, needed for strain)

Area = π x r²

Area = 3.14 x (0.006)²

Area = 0.00011304 m²

Stress = 10,000 / 0.00011304

Stress = 88,419,412 Pa

*Stress = 88.42 MPa ≈ 88.46 MPa

Last verified on 31-10-2026

Explanation

μ = Frictional Force / Normal Force

μ = Newton / Newton

Newton cancels, so it has no unit. It is dimensionless.

Last verified on 26-10-2026

Explanation

• Electric potential is a scalar quantity, so potentials from different charges are added algebraically.
• Equal positive and negative charges produce equal and opposite potentials at points that are equidistant from them.
• Their net electric potential is therefore zero at those points.

Last verified on 31-10-2026

Explanation

• A scalar quantity has magnitude only and no direction.
• Speed tells us how fast an object moves, without specifying its direction.

Additional information:

• Velocity, acceleration, and force are vector quantities because they have both magnitude and direction.

Last verified on 31-10-2026

Explanation

• Young's Double Slit Experiment demonstrates the wave nature of light through interference.
• When light passes through two narrow slits, the waves overlap and produce alternate bright and dark fringes.
• Bright fringes result from constructive interference, while dark fringes result from destructive interference.

Last verified on 31-10-2026