Rita climbs a ladder to the top of a water slide, waits her turn, and then slides down the slide into a pool. Which series describes the energy changes of her actions?
a
potential → mechanical → kinetic
b
kinetic → mechanical → potential
c
kinetic → potential → kinetic
d
potential → kinetic → potential
c
kinetic → potential → kinetic
When an object is in motion, it possesses what type of energy?
a
kinetic energy
b
potential energy
c
chemical energy
d
thermal energy
a
kinetic energy
Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Betsy's alarm clock to wake her up in the morning?
a
electrical energy is converted to sound energy
b
sound energy is converted to electrical energy
c
electrical energy is converted to thermal energy
d
chemical energy is converted to kinetic energy
a
electrical energy is converted to sound energy
An aluminum block with a temperature of 300oC is placed into 200 milliliters of water with a temperature of 20oC. Which statement best describes what will be observed in this experiment?
a
Heat will flow from the metal to the water until both are 300oC.
b
Heat will flow from the metal to the water until both are 20oC.
c
Heat will flow from the metal to the water until both are at a temperature somewhere between 20oC and 300oC.
d
Heat will flow from the metal to the water until both are at the temperature of the container.
c
Heat will flow from the metal to the water until both are at a temperature somewhere between 20oC and 300oC.
A student wants to show the transfer of heat energy without matter. Which investigation design would best help the student?
a
an investigation of conduction through collisions between particles in space
b
an investigation of radiation through a current in a fluid
c
an investigation of radiation through electromagnetic waves
d
an investigation of conduction through the movement of particles through a solid
c
an investigation of radiation through electromagnetic waves
The gravitational potential energy of an object depends on the mass of the object, the strength of the gravitational field, and which of the following relative to the ground?
a
the height of the object
b
the color of the object
c
the speed of the object
d
the shape of the object