Show:
Sound
Atoms
Physics
Light and Electricity
Newton's Laws
100
Are soundwaves transverse or longitudinal waves?
What is longitudinal?
100
Order the three constituent parts of the atom in terms of their size, from smallest to the largest.
What is electron, proton, neutron?
100
An astronaut holds an alarm clock. When she puts on her space suit, she is able to hear the alarm when it rings. If the astronaut then walks out of her spaceship onto the surface of the moon, will the astronaut still be able to hear the alarm? Why or why not?
She will not be able to hear it, because there is no medium for sound to move through in space or on the moon.
100
A small "package" of light that acts like a particle.
What is a photon
100
Friction that opposed motion once the motion has already started. Is is static or kinetic friction?
What is kinetic friction?
200
Any speed that is faster than the speed of sound in the subject of interest.
What is supersonic speed?
200
Atoms with the same number of protons, but different numbers of neutrons.
What is isotopes?
200
A boy is running north with a beanbag in his hands. He passes a tree and, at the moment he is beside the tree, he drops the beanbag. Will the beanbag land next to the tree? If not, will it be north or south of the tree?
What is north?
200
The Angle of reflection equals the angle of incidence.
What is The Law of Reflection?
200
Friction that opposes the initiation of motion.
What is static friction?
300
A wave with a direction of propagation that is parallel to its direction of oscillation.
What is longitudinal?
300
The number of protons in an atom.
What is the atomic number?
300
Which is the weakest of the fundamental forces? Which is the strongest?
Gravitational force is the weakest, the strong force is the strongest (it holds atoms together).
300
The amount of charge that travels past a fixed point in an electric circuit each second.
What is Electrical current?
300
A physical measurement that does not contain directional information.
What is a scalar quantity?
400
A wave with a direction of propagation that is perpendicular to its direction of oscillation.
What is transverse wave?
400
The sum of the neutrons and the protons in the nucleus of an atom.
What is the Mass number or Atomic mass.
400
Name the four fundamental forces in creation. Which two forces are really different aspects of the same force?
What is gravitational force, electromagnetic force, the strong nuclear force, the weak force. The weak force is a different aspect of the electromagnetic force.
400
A transverse wave composed of an oscillating electric field and a magnetic field that oscillates perpendicular to the electric field.
What is an electromagnetic wave?
400
The rate of change of an objects velocity.
What is acceleration?
500
The three classes sound waves are sonic, infrasonic, and ultrasonic. Which class of sound waves has the shortest wavelength?
What is infrasonic waves? They are shortest because they have the highest frequencies.
500
The half-life of the radioactive decay of 226Ra is 1,600 years. If a sample of 226Ra, origianlly had a mass of 10 grams, how many grams of 226Ra would be left after 4,800 years?
What is 1.25 grams.
500
In a physics experiment, a light ray is examined as it travels from air into glass. If the angle the light ray makes with a line perpendicular to the glass surface is measured, will the refracted ray bend toward or away from that line?
What is toward the line? Note: when light refracts into a substance in which it must slow down, the light ray will bend toward a line perpendicular to the surface it strikes.
500
The ability of a material to impede the flow of charge.
What is resistance?
500
A physical measurement that contains directional information.
What is a vector?