Buoyancy, Energy, and Thermal Conduction Quiz

Why can a steel ship float despite steel being much denser than water?

• Steel is lighter underwater
• The ship's shape and design displace water effectively
• Water becomes less dense when ships are present
• Steel becomes buoyant when in contact with water

What is the density of steel compared to water?

• Steel is 7.8 times denser than water
• Steel is 1/7.8 times denser than water
• Steel and water have equal density
• Water is 7.8 times denser than steel

What creates the upward force that supports a ship in water?

• Wind pressure
• Water resistance
• Buoyant force from displaced water
• Magnetic attraction

Why are heavy containers placed at the bottom of a ship?

• To increase fuel efficiency
• To lower the center of gravity and improve stability
• To make loading easier
• To reduce water resistance

What is the formula for Gravitational Potential Energy (GPE)?

• GPE = m × v × h
• GPE = m × g × h
• GPE = m × a × h
• GPE = m × f × h

What is the value of gravitational acceleration (g)?

• 9.8 m/s
• 9.8 km/h
• 9.8 cm/s
• 9.8 m/s²

What does the Energy Conservation Principle state?

• Energy can be created and destroyed
• Energy can only be transformed
• Energy is constant in an open system
• Energy decreases over time

Which of these is NOT a non-solar energy resource?

• Geothermal energy
• Tidal energy
• Solar energy
• Nuclear energy

How do electrons contribute to heat transfer in metals?

• By creating magnetic fields
• By carrying thermal energy
• By blocking heat movement
• By cooling the metal

What happens to metal atoms when heated?

• They stop moving
• They become less dense
• They vibrate more intensely
• They shrink