CIA 3 Practice

What is the energy transformation sequence for a flashlight?

• Chemical -> Electrical -> Light

• Electrical -> Chemical -> Sound

• Light -> Chemical -> Electrical

• Mechanical -> Electrical -> Heat

Which of the following is a characteristic of a thermal conductor?

• It allows heat to pass through easily.

• It prevents heat from passing through.

• It absorbs light energy.

• It reflects sound waves.

What is the primary method of heat transfer that does not require a medium?

• Radiation

• Conduction

• Convection

• Insulation

What is the formula used to calculate thermal energy?

• Q = mcΔT

• Q = m + c + ΔT

• Q = mc/ΔT

• Q = m - c - ΔT

If a 50g sample of water is heated from 20°C to 45°C, and the specific heat capacity of water is 4.18 J/g°C, how much thermal energy is transferred?

• 523.5 J

• 418 J

• 1045 J

• 209 J

What is the specific heat capacity of iron if a 100g piece is cooled from 150°C to 30°C and loses 0.45 J/g°C of heat energy?

• 0.45 J/g°C

• 4.18 J/g°C

• 0.90 J/g°C

• 1.00 J/g°C

How much energy is needed to heat 250g of aluminum from 25°C to 100°C if the specific heat of aluminum is 0.90 J/g°C?

• 16875 J

• 20250 J

• 11250 J

• 22500 J

Which wave behavior involves the bending of waves as they pass through different mediums?

• Reflection

• Refraction

• Diffraction

• Interference

What is required for mechanical waves to travel?

• A medium

• A vacuum

• No medium

• Only air

What happens in a series circuit if one bulb burns out?

• All bulbs go out

• Only the burned-out bulb goes out

• The circuit continues to work

• The brightness of other bulbs increases