Review Flashcard in GenSci

The shiny surface of a car mirror sends light rays back to the driver’s eyes. What phenomenon is this?

• Refraction

• Reflection

• Diffraction

• Interference

Which principle explains why large ships float even though they are made of steel?

• Pascal’s principle

• Bernoulli’s principle

• Newton’s first law

• Archimedes’ principle

Which of the following explains why skaters spin faster when they pull their arms inward?

• Their mass decreases.

• Centripetal force increases.

• Angular momentum is conserved.

• Friction with the ice decreases.

A submarine rises toward the surface when its buoyant force becomes:

• Equal to its weight

• Greater than its weight

• Less than its weight

• Independent of its weight

When a gymnast performs a somersault in mid-air, what type of motion is mainly demonstrated?

• Vibrational

• Translational

• Rectilinear

• Rotational

Which of the following is true about light waves?

• They cannot move without a medium

• They only move in solids

• They are mechanical waves

• They can travel through a vacuum

Which situation poses the highest electrical hazard?

• Handling wires with damaged insulation

• Plugging into a grounded outlet

• Using appliances with fuses

• Switching off unused devices

Why does a person hear sounds more clearly under water than in air?

• Water amplifies sound

• Sound travels faster in water than in air

• Sound cannot travel in air

• Water reduces sound energy

Which of the following physical quantities is considered a vector?

• Speed

• Mass

• Height

• Velocity

A spinning wheel on a fixed axle demonstrates what kind of motion?

• Angular

• Translational

• Linear

• Vibrational