Question 9 (3 points)
(11.10_q9) on a guitar string, the length of the vibrating string is changed by pressing down on different frets on the guitar neck. if frequency of the vibrating string changes from 440 hz to 660 hz, this means

we moved to a fret which shortened the vibrating part of the string.

we moved to a fret which lengthened the vibrating part of the string

we plucked the string harder while using the same fret

question 10 (3 points)
(11.10_q10) one of the quantitative measurements of sound is the frequency. the corresponding qualitative measure of sound is

pitch

amplitude

wavelength

period

question 11 (3 points)
(11.10_q11) in a longitudinal wave, which part of the wave has the highest pressure?

the compression

the rarefaction

question 12 (3 points)
(11.10_q12) when a police radar gun measures the speed of an approaching car the radar wave frequency bounced back to the radar gun is than the frequency the gun sent out to the car.

lower

higher

question 13 (3 points)
(11.10_q13) which of the following is an electromagnetic wave characteristic which is similar to a particle

wavelength

frequency

photoelectric effect

question 14 (3 points)
(11.10_q14) what is a light-year?

the amount of time it takes light to travel between 2 stars

the distance between 2 stars

the distance light travels in 1 year in a vacuum

question 15 (3 points)
(11.10_q15) when white light goes through a prism, it undergoes refraction and the different colors of white light are separated. this occurs because

the light is slowed down by the prism, but the different wavelengths of light are all slowed down a different amount by the prism.

the light is slowed down by the prism, but all wavelengths are slowed down the same amount.

question 16 (3 points)
(11.10_q16) the differences between red light and blue light can be explained in terms of wavelength, frequency and energy. which of the following is the description for red light.

longer wavelength, higher frequency, lower energy

longer wavelength, lower frequency, lower energy

shorter wavelength, higher frequency, higher energy

question 17 (3 points)
(11.10_q17) in an electric circuit, if the resistance is left unchanged, but the voltage is increased, then .

the current will increase.

the current will decrease.

the current will not change.

question 18 (3 points)
(11.10_q18) in an electric circuit, if the voltage is left unchanged and the resistance is increased, then

the current will increase

the current will decrease

the current will not change

question 19 (3 points)
(11.10_q19) diodes are somehow able to only let current flow one way through them. that means that if we install a diode backward, then .

the current will increase

the current will completely stop

the current will not be effected

question 20 (3 points)
(11.10_q20) in a series circuit made up of a battery and electronic components a, b and c. a resistor is added as component d. the total voltage is kept the same. what happens to the voltage drop across components a and b and c

the voltage drop across a, b and c will increase

the voltage drop across a, b and c will decrease

the voltage drop across a, b, and c will not change

question 21 (3 points)
(11.10_q21) in a series circuit made up of a battery and electronic components a, b, and c, the current flow between the battery and component a is measured as 3.75 amps. what is the current flow between component b and c?

3.75 amp

6.25 amp

it is impossible to tell with the information provided

question 22 (3 points)
(11.10_q22) what is the current flow in a circuit with a 6 volt battery and 10 ohm of resistance?

6 amp

1.6 amp

0.60 amp

question 23 (3 points)
(11.10_q23) in a circuit with a 12 volt battery, i try several different resistors and measure the current with each.

1 ohm resistor, 12 amp currnt

2 ohm resistor, 6 amp current

3 ohm resistor, 4 amp current

6 ohm resistor, 2 amp current

is this a direct or inverse relationship?

direct relationship

inverse relationship

question 24 (3 points)
(11.10_q24) a resistor is labeled with a value 1 kω. is this a qualitative or a quantitative indication?

qualitative

quantitative

question 25 (3 points)
(11.10_q25) i have said that we cannot change the current ourselves. we must change the voltage or the resistance and let them change the current. to reduce the current, what should we do to the voltage?

increase the voltage

decrease the voltage

don't change the voltage. voltage doesn't effect the current.