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Physics Final Review 🙏
Semester 2 Review
Terms in this set (41)
relationship between a dependent and independent variable?
the independent variable causes a change in the dependent variable
scientific notation for 7,000,000 and 0.000007?
7x10^6 and 7x10^-6
t/f: the independent variable goes on the x axis
t/f: heat flows from a colder substance to a warmer substance
temperature is the measure of
the average kinetic energy of the particles in a substance
"joule" can be a unit for
heat, energy, work
t/f: water has one of the highest specific heat capacities
0.5 kg, temp goes from 20° to 30°, 2000 J; specific heat capacity?
t/f: opposite charges attract and will pull towards each other with an electric force
If two electric charges are brought 4 times closer, the force between the two charges gets ____ as strong
What is the force between two 1x10^-5 C charges that are a distance of 30 cm apart?
10 N; use F=(k•q1•q2)/d^2
If a charge of 10 C in an electric field experiences a force of 500 N, what must be the electric field strength at that point in space?
50 N/C; use E=F/q
If a positively charged balloon is brought near a wall, the charge in the wall will become
If a positively charged balloon is brought near a wall,
Positive charge is repelled farther away leaving negative charge closer to the balloon.
If the voltage drop across a 5 ohm resistor is 25 V, what current must be flowing through the resistor?
5 A (use V=IR)
In order to get power to your house most efficiently, power companies send current through the power lines as
What is needed in order for current to be able to flow through a circut?
Closed current, voltage source, and a circuit made of conducting material.
t/f: metals are usually great conductors of electricity (as well as heat)
t/f: if your house is wired in series, when you shut one light off, every other electrical device in the house would also shut off.
How far apart are two charges in an electric field of strength 10 N/C if the potential difference between them is 10 V?
1 m (use V=Ed)
How much work is done to move a 2 C charge through a potential difference of 5 V?
10 J (use V=W/q)
t/f: since current flows through a circuit, you would need to hook up an ammeter in series with the circut in order to correctly measure the current
t/f: since voltage drops across a circuit, you would need to hook up a voltmeter in series with the circut in order to correctly measure the voltage across the circut.
In a circuit where the voltage source does not change, how could you alter the resistance in order to maximize the power produced by the voltage source?
Lower the resistance
A 100 W lightbulb with a resistance of 4 ohms is placed in a circuit. If the power produced is equal to the bulb's rating, what current must be flowing through the bulb?
5 A (P=I^2R)
t/f: if a magnet is cut in half, each half has a north and a south only.
t/f: magnetic field lines are conventionally drawn coming out of the south and into the north.
How long must a wire be if it is to experience a force of 50 N while carrying a current of 5 A through a magnetic field of 2 T?
5 m (F=BIL)
t/f: in order to create a current in a wire, all one has to do is move the wire near a magnetic field or vice versa.
t/f: in order to create the largest magnetic force on a charge, it must move parallel to the magnetic field.
t/f: a motor converts mechanical energy into electrical energy while a generator does the exact opposite.
If the period of an ocean wave is 5 seconds, what is the wave's frequency?
If the wavelength of an ocean wave is 2 m and its speed is 5 m/s, what is the wave's frequency?
t/f: amplitude of a sound wave determines how loud the sound is.
t/f: frequency of a sound wave determined which note (pitch) you hear
t/f: destructive interference happens when two waves on the same side of equilibrium add together to make a bigger wave
A longitudinal wave, like a sound wave, vibrates...
Back and forth in the same direction as the direction that the wave is headed
A transverse wave, like a light wave, vibrates...
Back and forth perpindicular to the direction that the wave is headed
What does it mean to say that "in space, no one can hear you scream"?
Sound waves need matter to travel through. Space is a vaccuum.
t/f: for the same reason that we can hear thunder after lightning, when q star explodes, we'll see it millions of years before we can hear the explosion
t/f: according the the law of reflection, the angle of incidence is exactly equal to the angle of reflection.
Recommended textbook explanations
Principles of Physics (International Edition)
David Halliday, Resnick, Walker
Giancoli Physics: Principles With Applications
Physics: Principles and Problems
Elliott, Haase, Harper, Herzog, Margaret Zorn, Nelson, Schuler, Zitzewitz
Glencoe Physics: Principles And Problems
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