Objects in motion stay in motion and objects at rest stay at rest unless acted on by an outside force.
100
An ampere is a unit of electrical
A. Pressure
B. Current
C. Resistance
D. None of these
B. Current
100
There is a greater proportion of carbon-14 in
A. New bones
B. Old bones
C. Same in each
A. New bones
100
True or False:
All mirrors produce a virtual image
False
200
Stars that have _____ mass than the sun will end their lives as white dwarfs.
the same
200
Energy of motion is ____ energy.
kinematic
200
An electric motor is most similar to:
A. An electric motor
B. A car battery
C. A radio receiver
D. None of these
A. An electric motor
200
A device that is used primarily to detect nuclear radiation is a.....
Geiger counter
200
Einstein developed his theory of relativity in what year?
1905
300
The Hubble Space Telescope measures ____ light.
visible
300
A wind turbine converts _____ energy into electrical energy.
mechanical
300
True or False:
A leaf floating up and down in a pond is an example of a longitudinal wave.
False
300
Your friend tells you that she discovered a new element with atomic number 407. How many electrons are in this new element?
407
300
How many focal points does a lens have?
Two
400
Which astronomer was imprisoned because of his support of the sun-centered universe model?
Galileo
400
A ball rolling down an incline has its maximum kinetic energy at
the bottom
400
The electric power of a lamp that carries 2 A at 120 V is ____watts.
240
400
The half-life of an isotope is one day. At the end of three days, how much of the isotope remains?
1/8
400
The shortest plane mirror in which you can see your entire image is....
Half your height
500
A ball is thrown straight upward in the air. Neglect air resistance. While the ball is in the air, its acceleration...
remains constant
500
A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is
A. Zero
B. Doubled
C. Quadrupled
D. Unchanged
B. Unchanged
500
The current through a 10-ohm resistor connected to a 120-V power supply is how many amps?
12 A
500
What was Marie Curie's native country?
Poland
500
A Doppler effect occurs when a source of sound moves.....