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Energy Transformation

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Last updated about 4 years ago
11 questions
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Some students observing a classroom device being used, noticed the below energy transformations. Electrical → Mechanical → Sound Which device were the students most likely observing?
A triple beam balance measuring an object’s mass.
A pencil sharpener plugged into a wall outlet
A projector displaying a diagram on the screen.
A working flashlight used to light up a dark corner.
Which type of energy transformation occurs when a flashlight shines?
chemical → thermal → electrical
chemical → electrical → light
chemical → electrical → chemical
thermal → chemical → light
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?
mechanical → sound → light
thermal → solar → electrical
chemical → light → electrical
electrical → thermal → light
The Theory of the Conservation of Energy states...
The total energy in our Universe changes, as different forms of energies can be transformed from each other under certain circumstances.
Energy can never be created nor destroyed. It can only change its form from one type to another.
Energy can be created, just not destroyed. It changes its form from one type to another.
Energy transformations do not passively occur in our lives, rather we actively make use of energies and transform energies.
Question.
Solar Energy (electromagnetic) is transferred to _____ Energy.
Mechanical
Solar
Electrical
Sound
.
Question.
Electrical Energy is primarily transferred to _____ Energy.
Electrical
Thermal
Electromagnetic
Nuclear
People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?
mechanical to thermal to electrical
chemical to mechanical to thermal
chemical to sound to electrical
mechanical to chemical to sound
A television works by transforming electrical energy into what other kinds of energy?
Thermal, chemical, and solar
Sound, mechanical, and electrical
Light, thermal, and sound
Light, chemical, and mechanical
Question.
As a pendulum swings downward, the kinetic energy ___________ while the potential energy ______________.
decreases ; increases
decreases; stays the same
increases; decreases
increases; stays the same
Question.
A hawk eats a mouse and then uses the energy to fly off to its nest. What energy transformation has occurred?
Mechanical to Thermal
Mechanical to Kinetic
Thermal to Chemical
Chemical to Mechanical