Radiation
What type of nuclear decay releases energy but not a particle?
gamma decay
Transverse and longitudinal waves both do this
transfer energy through a medium.
When a sound source approaches you, the pitch you hear is _______________ than when it is stationary
higher
Light acts like
both a wave and a particle.
This solid-state component in a mobile phone maintains proper voltage levels in the circuits
diodes
What type of current is produced by a battery?
direct current
The half-life of a radioisotope is the amount of time it takes for
half the sample to decay.
Which type of mechanical wave needs a source of energy to produce it?
All waves need an energy source
Which of the following occurs as a light wave bends when it passes from one medium into another?
refraction
Infrared rays have a shorter wavelength than
radar waves.
Which of the following is made from a crystalline solid that conducts a current only under certain circumstances?
semiconductor
Which part of the ear amplifies the vibrations from sound waves?
middle ear
How are nuclear reactions different than chemical reactions
Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.
Which wave causes the medium to vibrate only in a direction parallel to the wave’s motion?
a longitudinal wave
A piano, violin, or guitar uses the resonance of a wooden soundboard to
amplify the sound.
X-ray photographs show softer tissue
as dark, highly exposed areas.
If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by
dividing the power by the voltage
What is one property of a wave that determines how much it will diffract when it encounters an obstacle?
wavelength
Uranium-238 emits an alpha particle and forms thorium-234 is an example of this process
Transmutation
A disturbance sends ripples across water in a tub. These ripples are an example of a
surface wave.
To calculate the frequency of an electromagnetic wave, you need to know the speed of the
wave and its
wavelength.
Light whose waves all have the same wavelength, direction, and coincidental peaks is called
coherent light.
A ground-fault circuit interrupter shuts down a circuit if it
senses unequal currents.
Suppose two waves collide and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?
destructive interference
When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a neutron. What is the other product?
californium-245
The time it takes one complete wavelength to pass a fixed point is a ___________
Period
What an object is made of and the color of light that strikes it determine the
apparent color of the object.
A fluorescent light tube usually contains
mercury vapor.
What is the difference in electrical potential energy between two places in an electric field?
potential difference
Many streets and parking lots are illuminated with
sodium-vapor lights.