Question

An absorption spectrum can be described as

Select one:

a. a continuous band of all wavelengths

b. none of these choices are correct

c. dark lines on a continuous background

d. bright lines on a dark background

A continuous spectrum can be described as

Select one:

a. bright lines on a dark background

b. a continuous band of all wavelengths

c. dark lines on a continuous background

d. none of these choices are correct

An emission spectrum can be described as

Select one:

a. a continuous band of all wavelengths

b. dark lines on a continuous background

c. none of these choices are correct

d. bright lines on a dark background

Three resistors R1=

5.8Ω, R2=9.5Ω, and R3=8.8Ω

are connected in series. A single equivalent resistor for the three would have a resistance equal to

Select one:

a. 2.56ohms

b. none of these choices are correct

c. 24.10ohms

d. 0.39ohms

Three resistors R1=

3.2Ω, R2=7.5Ω, and R3=6.4Ω

are connected in parallel. A single equivalent resistor for the three would have a resistance equal to

Select one:

a. 17.10ohms

b. 1.66ohms

c. none of these choices are correct

d. 0.60ohms

Answer 1

1)

An absorption spectrum can be described as

answer is

c. dark lines on a continuous background

2)

A continuous spectrum can be described as

answer is

b. a continuous band of all wavelengths.

3)

An emission spectrum can be described as

answer is

d. bright lines on a dark background

4)

Three resistors R₁=5.8Ω, R₂=9.5Ω, and R₃=8.8Ω

are connected in series.

equivalent resistance R_eq = R₁+R₂+R₃ =

R_eq = 5.8Ω + 9.5Ω + 8.8Ω = 24.1Ω

R_eq = 24.1Ω

answer option c. 24.10 ohms

5)

Three resistors

R₁=3.2Ω, R₂=7.5Ω, and R₃=6.4Ω

are connected in parallel. A single equivalent resistor

1/R_eq = 1/R₁ + 1/R₂ + 1/R₃

1/R_eq  = 1/3.2Ω + 1/7.5Ω +1/ 6.4Ω .

R_eq = 1.66Ω

answer b. 1.66 ohms