2. In longitudinal waves the medium
a. vibrates in a direction perpendicular to the direction of motion of the wave
b. vibrates in the same direction as the wave is moving
c. moves in a circular motion
d. doesn't vibrate, the disturbance just moves through the medium
3. What is it that travels through an elcetric circuit at nearly the speed of light?
a. electrons
b. protons
c. a potential difference
d. an electric field
4. consider an electrical transformer that has 10 loops on it's primary coil and 20 loops on it's secondary coil.. what is the coltage in the secondary coil if the primary is supplied with 120 V?
a. 120 V
b. 60 V
c. 240 V
d. 480 V
5. which of the following unit is actually a measure of rate?
a. volt
b. coulomb
c.amp
d. ohm
2007-03-05 03:49:49 · 4 answers · asked by Stacey lynn 2 in Science & Mathematics ➔ Physics
Steel
b
a
b
c
2007-03-05 04:39:40 · answer #1 · answered by gebobs 6 · 0⤊ 0⤋
(1) steel
(2) b
(3) b
(4) b
(5) a
2007-03-05 12:04:59 · answer #2 · answered by sulweb4world 1 · 0⤊ 0⤋
ok - i'm not doing your homework - but answer a is steel - its to do with how close the atoms are - the close the faster
2007-03-05 11:59:12 · answer #3 · answered by cool321steve 3 · 0⤊ 0⤋
ROTFLMAO sound doesnt travel through vacuum
2007-03-05 11:55:10 · answer #4 · answered by para 5 · 0⤊ 0⤋