Exploring Force, Speed, and Heat

What is the main difference between speed and velocity?

• Speed includes direction while velocity does not.

• Speed and velocity are the same concept.

• Velocity is always greater than speed.

• The main difference is that speed is scalar (magnitude only), while velocity is vector (magnitude and direction).

If a car travels 60 km in 1 hour, what is its speed?

• 70 km/h

• 30 km/h

• 60 km/h

• 50 km/h

Define displacement in your own words.

• Displacement is the change in an object's mass over time.

• Displacement refers to the speed of an object at a given moment.

• Displacement is the total distance traveled by an object regardless of direction.

• Displacement is the vector quantity that represents the shortest distance from an object's starting point to its ending point, including direction.

How do you calculate the distance traveled if you know the speed and time?

• Distance = Time ÷ Speed

• Distance = Speed + Time

• Distance = Speed - Time

• Distance = Speed × Time

What is the formula for calculating velocity?

• velocity = displacement / time

• velocity = acceleration x time

• velocity = time / displacement

• velocity = distance / speed

List the three types of heat transfer.

• Absorption, Reflection, Diffusion

• Insulation, Conduction, Convection

• Evaporation, Condensation, Sublimation

• Conduction, Convection, Radiation

What is conduction in terms of heat transfer?

• Conduction is the transfer of heat through radiation.

• Conduction is the movement of heat through the air without contact.

• Conduction is the transfer of heat through direct contact between materials.

• Conduction occurs when heat is transferred through fluids.

Explain convection and give an example.

• An example of convection is the heating of water in a pot on a stove, where hot water rises to the top and cooler water moves down to the bottom.

• The cooling of air in a refrigerator is an example of convection.

• Convection occurs only in solids and does not apply to liquids or gases.

• An example of convection is the freezing of water in an ice tray.

What is radiation in the context of heat transfer?

• Radiation is the movement of heat through liquids.

• Radiation is the transfer of heat through electromagnetic waves.

• Radiation is the process of heat transfer via direct contact.

• Radiation is the transfer of heat through conduction.

How does temperature differ from heat?

• Temperature and heat are the same concept in physics.

• Temperature is the total energy of a system; heat is the average energy.

• Temperature measures kinetic energy; heat is energy transfer.

• Heat is a measure of temperature; temperature is energy transfer.