Energy transformation

Front

Energy changes in a toy helicopter when its circuit is connected to a battery.

Back

chemical to electrical to mechanical

Front

A hot (100 °C) bolt with a mass of 71 grams is placed in 150 grams of cool (20 °C) water. The specific heat of water is 4.184 J/g × °C. Approximately how many joules of heat did the water absorb? (Heat Lost or Gained = Mass × Specific Heat × Change in Temperature) (Q = m c ΔT)

Back

2,510.40 J

Front

Which gadget shows the transformation of energy from electrical to mechanical?

Back

A fan because electricity is being used to spin the blades of the fan.

Front

Two students place three ice cubes in a glass of water that was at room temperature. What happens next?

Back

Energy from the water will transfer to the ice cubes, causing the ice to melt.

Front

Energy transformations in a cell phone call: What evidence shows chemical energy transforming into electrical energy, and what other transformations occur for a call to be received?

Back

Evidence: Cell phones are powered by a battery that produces the electricity used to send or receive a call. Transformation 1: Sound energy is transformed into electromagnetic waves by cell phone A. Transformation 2: Electromagnetic waves are transformed back into sound energy by cell phone B.

Front

Choose the image below that shows potential energy decreasing then increasing if following the arrows from left to right?

Back

Front

Identify the three forms of heat transfer using the image. Options: A: CD - B: CV - C: R, A: R - B: CD - C: CV, A: CV - B: CD - C: R, A: R - B: CV - C: CD

Back

A: CV - B: CD - C: R

Front

Choose the statement below that best describes the transfer of energy from the Sun to the Earth.

Back

The sun is the ultimate source of energy because it uses nuclear fusion to create heat. The thermal energy it creates radiates through the vacuum of space and heats the Earth.

Front

Energy transformation of a pendulum's Bob when released from Point A.

Back

KE changes to PE as the Bob moves from D to E.

Front

A large cup of ice is poured into a glass pitcher of freshly brewed hot tea. The ice melts quickly and the tea in the glass pitcher gets much colder. If we wait twenty-four hours, what temperature would we expect the tea and ice mixture to reach?

Back

The tea transferred energy to the ice until they had equal amounts of energy. They will reach a temperature somewhere between each of their original temperatures.