Types of Energy
What type of energy does Alex Honnald have standing at the top of a cliff?
Potential Energy
How much energy does the entire track team have, if they run an average speed of 10 m/s and have a combined mass of 1,800 kg?
True or false, x-rays and visible light are both forms of electromagnetic radiation
True
A car rolling down a hill has 1000 J of potential energy, 500 J of kinetic energy. If no energy is lost to heat, what is the total energy of the car?
1500 J
What type of energy powers a lightbulb? Also, what type of energy does a lightbulb produce?
Electric / Radiant
This floor is 5 meters off the ground. A class of students weighs about 1500 kg. How much gravitational potential energy does this class have?
75,000 J
The metric unit for energy.
Joule (J)
Although energy can neither be created nor destroyed, usable energy can be "lost". Energy is most often lost to what form(s)?
Heat and sound
Which equation should you use to calculate the energy of water in a water tower?
PE = m x g x h
"Someone" nails a student in the nose with a 0.5kg dodgeball moving at 20 m/s. How much energy does their nose absorb?
100 J
I drink a hot chocolate on a snowy day and its heat warms me from the inside. This is an example of an energy ______________.
transfer or conduction
A pendulum starts with 10 J of potential energy. As it swings, it loses 6 J of energy to heat. How much kinetic energy will the pendulum have at the bottom of it's swing?
4 J
Which equation should you use to calculate the energy of a cute puppy after he has been thrown (gently) across the room?
KE = 1/2 mv2
Which has more energy, a 0.01kg bullet traveling at 300 m/s or a 1 kg baseball thrown at 40 m/s?
The baseball
(KE of bullet is 450J and KE of baseball is 2400)
Which has more energy, low frequency red light or high frequency gamma radiation?
Gamma rays
A roller coaster starts on a hill with 300 J of energy. At the bottom of a hill it has 250 J of kinetic energy and 10 J of potential energy. How much energy was lost as heat?
40 J
Draw a model that shows energy flow from the Sun to your phone. (4+ steps)
Sun >> Wind >> Mechanical in a turbine >> Electrical on the grid >> Chemical in the phone >> Sound/radiant from the phone
How much more energy do I have when sleeping in my top bunk bed at 2 m, than my bottom bunk bed at 1 m? I weigh 65 kg.
650 J more
Which type of heat transfer drives plate tectonics?
convection (of the mantel)
A 1000 kg car is moving at 10 m/s at the top of a 10 m hill. Assuming no energy is lost to heat, how much total energy does the car have?
200,000 J