Loading
by BlastRoom
Trace energy transformations through common devices and processes.
#physics
40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
Water is stored in a tank on a tower before it flows down through pipes. Which energy form does the water store because of its raised position?
A bowstring is pulled back and held still just before release. Which energy form is stored in the bent bow and stretched string?
A skateboard rolls across a smooth floor at 4.0 m/s. Which energy form is associated with the skateboard's motion?
Gasoline is sitting in a sealed fuel tank before the engine starts. Which energy form is stored in the fuel's molecular bonds?
A charged capacitor has positive charge on one plate and negative charge on the other. Which energy form is stored by that separation of charge?
A steel block has been heated with a torch and is warmer than the room. Which energy store in the block has increased most?
A flywheel spins rapidly on a low-friction axle. Which energy form is mainly stored in the spinning wheel?
A spring inside a wind-up toy is twisted and held before the toy is released. Which energy form is stored in the spring?
Sunlight arrives at a solar panel on a clear day. Which energy form is carried by the incoming sunlight?
A student eats a granola bar before running. Which energy form is stored in the food before the student's body uses it?
A flashlight with dry cells is switched on; its bulb glows and becomes warm. Which ordered energy chain best matches the device while it operates?
Water behind a dam falls through a turbine connected to a generator. Which sequence describes the main energy transformations?
A wind turbine turns on a windy day and sends current to the grid. Which energy chain fits this process?
A solar panel powers a small fan motor in sunlight. Which ordered chain is correct?
A toaster is plugged in and the heating wires glow red while warming bread. Which energy transfer is most accurate?
A loudspeaker is connected to an amplifier and produces a note while its cone vibrates. Which chain best describes the energy transfer?
A pendulum is released from rest at one side and later stops because of air resistance and pivot friction. Which overall chain is correct?
A person turns the crank on an emergency flashlight, and the lamp lights. Which energy chain best describes the system?
A microwave oven uses electrical input to warm soup. Which sequence best matches the energy transfers?
A rechargeable battery is plugged into a charger and becomes ready to power a device later. Which energy chain is correct during charging?
A rubber-band toy car is wound up and released, then eventually stops on the floor. Which chain best describes the energy changes?
In a simplified nuclear power plant, a reactor heats water into steam that spins a turbine connected to a generator. Which chain is correct?
Use the process figure for a gasoline car engine. Which form belongs in the blank stage?
Use the process figure for a solar fan. Which form belongs in the blank stage?
Use the process figure for a hydroelectric generator. Which form belongs in the blank stage?
Use the process figure for a battery-powered buzzer. Which form belongs in the blank stage?
Use the process figure for a bow firing an arrow. Which form belongs in the blank stage?
Use the process figure for a wind-up toy. Which form belongs in the blank stage?
Use the process figure for an electric motor lifting a block. Which form belongs in the blank stage?
Use the process figure for a cordless drill spinning a bit. Which form belongs in the blank stage?
A small motor receives 480 J of electrical energy and lifts a load so the load gains 120 J of gravitational potential energy. What is the motor's efficiency for lifting?
A generator receives J of mechanical energy from a spinning shaft and outputs J of electrical energy. What is its efficiency?
An LED lamp uses 150 J of electrical energy each second and emits 45 J of light energy each second. What is its efficiency for producing light?
A loudspeaker is supplied with 250 J of electrical energy and transfers 10 J to useful sound energy. What is the speaker's efficiency for sound output?
An electric kettle receives J of electrical energy and transfers J usefully to the water's internal energy. What is its efficiency?
A solar cell receives J of radiant energy and delivers 180 J of electrical energy to a circuit. What is the cell's efficiency?
A book sliding across a rough table slows to a stop. A student says its kinetic energy was used up and disappeared. Which account is correct?
A rubber ball dropped on a hard floor rebounds lower after each bounce. Which explanation follows conservation of energy?
An incandescent lamp is on for several minutes. A student says the electrical energy is used up in the filament. Which statement is more accurate?
A bicycle's brakes bring the moving bike to rest on level pavement. What happened to most of the bike's kinetic energy?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Momentum
40 questions
