Show:
Work & Power
Potential & Kinetic Energy
Forms of Energy
Waves
Electromagnetic Spectrum
100
The formula for work
What is force x distance?
100
Define and give the formula for P.E.
What is energy at rest (stored); P.E.=mgh
100
The form of energy that must include motion.
What is mechanical energy?
100
The type of wave in which particle motion is parallel to wave direction (motion)
What is transverse waves?
100
The part of the electromagnetic spectrum can we see.
What is visible light?
200
Formula for Power
What is Work/time?
200
Define and give the formula for K.E.
What is K.E. is energy of motion;1/2mv^2
200
The form of energy also known as heat energy
What is thermal energy?
200
A type of wave in which particle motion is perpendicular to the direction of the wave
What is compressional/longitudinal?
200
The most dangerous wave on the electromagnetic spectrum
What are Gamma Rays?
300
In which scenario is scientific work being done? Explain. A. Your hands on a stack of books you carry. B. Your foot on a soccer ball as you kick the soccer ball to make a goal C. Your arms as you try to push open a locked door D. You hand on a rope in a game of tug-of-war in which neither team moves
What is B because you are applying a force on the ball and the ball is moving in the direction of the force. All other examples there is no movement.
300
Describe your potential & kinetic energy as you are on a roller coaster given the following scenario: You are at the top of a roller coaster waiting to ride down. You come down slowly at first and then pick up speed. You reach the bottom, and then start to go up again, slowing down.
What is At the top of the coaster you have all potential energy, then you gain kinetic energy and reduce potential energy. At the bottom you have almost all kinetic energy. On the way up again, you gain potential energy and reduce kinetic energy.
300
The form of energy that would be in salt (NaCl)
What is chemical energy?
300
A sound wave is being recorded. You notice that the wavelength of the sound wave is decreasing, what could you say about the frequency of the sound wave during this time?
What is increase in frequency?
300
The wave on the electromagnetic spectrum that has the longest wavelength.
What are radio waves?
400
During a strength and fitness contest, each participant must move 120 fifty-kilogram weights from the floor to a shelf 1 meter above the floor. The participant with the fastest time wins the contest. If all the participants finish the task, who has done the most work? Who has the most power? Explain.
What is all participates complete the same amount of work because they all finish the same task; the winner has the greatest amount of power because they did the same amount of work is less time (quicker)
400
A 2kg box is sitting on a shelf that is 10m high. What is the energy of the box? Include units!
What is 196J?
400
You strike a match to light it. What energy transformation happens?
What is chemical to thermal?
400
Define Doppler Effect. Give an example of a Doppler Effect.
What is the change in frequency in relation to the motion of the wave source or the observer. Cop's siren sounding louder when coming towards you and lower when going away from you.
400
An example of a transverse wave
What are water waves, heat waves, light waves, radio waves,gamma rays?
500
Doug rolls a bowling ball down a 10m lane with a force of 5N. The ball took 25secs to reach the pins. Calculate the work and power used. Include units!
What is W=50J? P=2W?
500
A 50kg car is driving 10m/s. What is the energy of the car? Include units!
What is 2,500 J?
500
A man puts gas in his car. He then starts his car and drives to his house. What forms of energy transformation occurs. List each one.
What is chemical to mechanical (gas to driving) and mechanical to thermal (driving(engine running) to (thermal-heat given off by the engine))?
500
The type of wave that does not need a medium to travel through. Give an example.
What are electromagnetic waves? Light.
500
Is a wave with high frequency dangerous? Why?
Yes, the higher the frequency, the greater the energy. Greater energy, more harmful to the body.