Exploring the Wonders of Physics

What is Newton's second law of motion?

• The acceleration of an object is constant regardless of the net force applied.

• An object in motion will stay in motion unless acted upon by an equal force.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

• The force acting on an object is equal to its mass times its velocity (F = mv).

Define the concept of inertia.

• Inertia is the force that causes an object to move faster.

• Inertia is the energy stored in an object at rest.

• Inertia is the resistance of an object to changes in its state of motion.

• Inertia is the speed at which an object travels in a straight line.

What is the principle of conservation of momentum?

• Total momentum is only conserved during elastic collisions.

• In an open system, momentum is always increasing.

• In a closed system, total momentum is conserved.

• Momentum can be created or destroyed in any system.

Explain the difference between scalar and vector quantities.

• Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

• Scalar quantities have direction, while vector quantities have only magnitude.

• Scalar quantities can be represented as arrows, while vector quantities cannot.

• Both scalar and vector quantities have no magnitude or direction.

What is the formula for gravitational potential energy?

• U = mvr

• U = mgh

• U = 1/2 mv^2

• U = Fd

Describe the behavior of light as it passes through a prism.

• Light reflects off the surface of the prism without changing direction.

• Light absorbs into the prism and does not pass through.

• Light travels in a straight line without any alteration.

• Light refracts and disperses into a spectrum of colors as it passes through a prism.

What is Snell's law in optics?

• n1 + n2 = sin(θ1) + sin(θ2)

• n1 / n2 = sin(θ2) / sin(θ1)

• n1 * tan(θ1) = n2 * tan(θ2)

• Snell's law: n1 * sin(θ1) = n2 * sin(θ2), where n1 and n2 are the refractive indices of the two media.

Explain the concept of total internal reflection.

• Total internal reflection can happen at any angle of incidence.

• Total internal reflection occurs only in solids.

• Total internal reflection is the phenomenon where a wave is completely reflected at the boundary of two media when the angle of incidence exceeds the critical angle.

• Total internal reflection is the absorption of light at a boundary.

What is the difference between concave and convex lenses?

• Concave lenses converge light rays, while convex lenses diverge them.

• Concave lenses are thicker in the middle than convex lenses.

• Concave lenses diverge light rays, while convex lenses converge them.

• Both concave and convex lenses diverge light rays.

What is the Doppler effect?

• The Doppler effect is the increase in amplitude of a wave due to the observer's motion.

• The Doppler effect refers to the change in color of an object due to temperature variations.

• The Doppler effect is the change in frequency or wavelength of a wave due to the relative motion between the source and the observer.

• The Doppler effect is the phenomenon where sound waves are absorbed by the medium they travel through.