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Q 1/18
Score 0
In what direction do sound waves travel from a vibrating source?
30
no direction
in opposite direction
in all directions
in two directions
Q 2/18
Score 0
What does sound need to travel?
30
energy
matter
light
vacuum
18 questions
Q.
In what direction do sound waves travel from a vibrating source?
1
30 sec
Q.
What does sound need to travel?
2
30 sec
Q.
Which of the following is used to transport sound waves?
3
30 sec
Q.
Sound is a type of mechanical wave which is transmitted through a medium that is solid, liquid, or gas. Which of the following statements is true about a sound wave?
4
30 sec
Q.
Which of the following directly affects the speed of sound in a medium?
5
30 sec
Q.
Atom has subatomic particles that create electric current. Which part of an atom an electric current originates?
6
30 sec
Q.
Different materials have different amounts of resistance. Conductors are materials that permit electric charge to flow freely from particle to particle. Which of the following materials has greater amounts of resistance?
7
30 sec
Q.
Which of the following correctly describes voltage?
8
30 sec
Q.
Which of the following statements is incorrect?
9
30 sec
Q.
What does the letter 'I' stand for in Ohm's Law?
10
30 sec
Q.
Which word means how fast the electrons flow?
11
30 sec
Q.
Which word means how hard it is for electrons to flow?
12
30 sec
Q.
Which of the following laws expresses the mathematical relationship between voltage, current, and resistance?
13
30 sec
Q.
What happens to current if the voltage stays the same and resistance is increased?
14
30 sec
Q.
What will happen to the total resistance and to the total current as the number of resistors increases respectively?
15
30 sec
Q.
Which of the following is a correct statement of Ohm's law?
16
30 sec
Q.
An electric heater works by passing a current of 100 A through a coiled metal wire, making it red hot. If the resistance of the wire is 1.1 ohms, what voltage must be applied to it?
17
30 sec
Q.
How much is the resistance of an alarm clock draws 0.5 A of current when connected to a 120 volt circuit.
