Question 18Question 183.33 pts

1. Liquid flows through a 4.0 cm diameter pipe at 1.0 m/s. There is a 2.0 cm diameter restriction in the line. What is the velocity in this restriction?

Group of answer choices

a. 0.25 m/s

b. 0.50 m/s

c. 2.0 m/s

d. 4.0 m/s

Flag question: Question 19Question 193.33 pts

1. A string of linear density 1.5 g/m is under a tension of 20 N. What should its length be if its fundamental resonance frequency is 220 Hz?

Group of answer choices

a. 0.26 m

b. 0.96 m

c. 1.1 m

d. 1.2 m

Flag question: Question 20Question 203.33 pts

1. How much pressure (absolute) must a submarine withstand at a depth of 120.0 m in the ocean?

Group of answer choices

a. 1200 N/m2

b. 1310 N/m2

c. 1200 kPa

d. 1310 kPa

Flag question: Question 21Question 213.33 pts

1. An organ pipe open at both ends has a length of 0.80m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmonic?

Group of answer choices

a. 213 Hz

b. 425 Hz

c. 638 Hz

d. 850 Hz