Which of the following is luminous? Sun
A source of light given off as a result of high temperatures is said to be
An idealized material that absorbs and perfectly emits electromagnetic radiation is a
Electromagnetic radiation is
The Fahrenheit thermometer scale is no more accurate than the Celsius scale.
On the Celsius temperature scale
the numbers relate to the boiling and freezing of water.
Internal energy refers to the total potential and kinetic energy of the molecules.
According to the definition of mechanical work, pushing on a rock accomplishes no work unless
there is movement in the same direction as the direction of the force.
The metric unit of a joule (J) is a unit of
any of the above.
A Nm/s is a unit of power.
A straight-line distance covered during a certain amount of time describes an objects
How fast an object is moving in a particular direction is described by
Acceleration occurs when an object undergoes
a speed decrease
A car moving at 60 km
A back and forth motion that repeats itself is a
The number of vibrations that occur in 1 s is called frequency.
Frequency is measured in units of hertz.
The maximum displacement from rest to the crest or from rest to the trough of a wave is ca
Electrostatic charge results from
transfer or redistribution of electrons.
unit of electric charge is the coulomb.
An electric field describes the condition of space around a charged particle.
A material that has elections that are free to move throughout
The plane of Earth's orbit is called the
plane of the ecliptic.
The spinning of a planet on its axis, an imaginary line through its poles, is called rotation.
The consistent tilt and the orientation of its axis as Earth moves around its orbit is responsib
The mass of the Sun is how much larger than all of the other planets, moons, asteroids, and other
bodies in the solar system? 700 times larger
The distance from Earth to the Sun is called a (an) astronomical unit.
What type of planets are Mercury, Venus,
A referent system that can be used to locate objects in the sky is the celestial sphere.
Our Sun is
an average star, considering mass and age.
The brightness of a star at a defined standard distance is
The total amount of energy radiat
A generalized mental image of an object is. a concept
The best example of the use of referent is. big as a dump truck
A well-defined and agreed-upon referent used a standard in all systems of measurement is
The system of measurement based o