Physics, 28.01.2020 07:31 sebastiantroysmith
Which of the following choices defines energy in scientific terms?
a. the motion of an object
b. the ability to do work
c. a force multiplied by distance
d. a change in temperature
what happens when a lamp plugged into an electrical outlet is turned on?
energy is lost.
energy is gained.
the form of energy changes, but the total energy remains the same.
the form of energy changes and the total energy increases.
how much work is accomplished when a force of 300 n pushes a box across the floor for a distance of 100 meters?
300 n
30,000 n
300 j
30,000 j
which of the following is not an example of work, according to the scientific definition?
lifting a suitcase off the floor
leaning against a brick wall on the side of a building
pulling a sled across the snow
pushing a grocery cart
how do simple machines make work easier?
they change the strength or direction of a force.
they apply force quickly.
they decrease the power available.
they maintain the distance of a force.
what has changed when a gardener uses a lever to lift a rock, instead of lifting it by hand?
more force is applied over a longer distance.
less force is applied over a longer distance.
more force is applied over a shorter distance.
less force is applied over a shorter distance.
which scientific description of heat is accurate?
heat is the total thermal energy of any single object.
heat is the average kinetic energy of atoms in an object.
heat is the flow of thermal energy from one object to another.
heat is the total kinetic energy of atoms in an object.
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Which of the following choices defines energy in scientific terms?
a. the motion of an...
a. the motion of an...
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