Q: A garden hose sprays water vertically to a height of $$0.68\ \mathrm{m}$$ due to a small leak. What is the pressure inside the hose?

$$1.08 \times 10^5$\ \mathrm{Pa}$$

Q: In a U-tube experiment, oil is poured into one side until the oil column is $$H = 27.2 cm $$tall and the water level on the other side is $$h = 2.18 cm $$lower. Which equation correctly relates the densities and heights?

$$\rho_{\text{oil}} H = \rho_{\text{water}} h$$

Question 1

A 2.75 m long organ pipe is shown with a standing wave pattern that has three antinodes. Which harmonic is being displayed in the pipe?

Accepted Answer

The third harmonic

Question 2

Given a 2.75 m long organ pipe with the third harmonic standing wave, what is the wavelength $$\lambda of $$the wave in the pipe?

Accepted Answer

$$\lambda = 3.67\ \mathrm{m}$$

Question 3

A clarinet produces a tone of 466 Hz. When played with a second clarinet, 8 beats are heard every 3.00 seconds, and the second clarinet is higher in pitch. What is the frequency of the second clarinet?

Accepted Answer

468.7 Hz

Question 4

A rock is composed of granite ($$ho = 2,650\ \mathrm{kg/m^3$}) $$and gold ($$ho = 19,300\ \mathrm{kg/m^3$}). $$The rock's volume is $$3.84 	imes 10$$^{-4}$$\ \mathrm{m^3$}$$ and its mass is 3.40 kg. What is the mass of gold in the rock?

Accepted Answer

2.76 kg

Question 5

A circular wine barrel (diameter 75 cm) bursts if the net upward force on the top is 643 N. A tube (diameter 1.0 cm) is inserted through the top. What weight of water must be poured into the tube to burst the barrel?

Accepted Answer

0.11 N

Question 6

A 750 g block of iron (volume $$9.54 	imes 10$$^{-5}$$\ \mathrm{m^3$}) is $$attached to a spring scale and suspended above a beaker of water on a kitchen scale. The beaker and water have a combined mass of 1 kg. If the block is fully submerged but still attached to the spring scale, what do the spring scale and kitchen scale read (in N)?

Accepted Answer

Spring: 6.42 N, Kitchen: 10.75 N

Question 7

A U-tube is filled with water and oil. The oil column is $$H = 27.2 cm $$tall, and the water level on the other side is $$h = 2.18 cm $$shorter than the oil column. What is the density of the oil?

Accepted Answer

$$\rho = 920\ \mathrm{kg/m^3$}$$

Question 8

Water flows through a pipe at $$2.4\ \mathrm{m/s}$$ with a diameter of $$3.1\ \mathrm{cm}. $$What is the mass flow rate in $$\mathrm{kg/s}$$?

Accepted Answer

$$1.81\ \mathrm{kg/s}$$

Question 9

A garden hose sprays water vertically to a height of $$0.68\ \mathrm{m}$$ due to a small leak. What is the pressure inside the hose?

Accepted Answer

$$1.08 	imes 10^5$\ \mathrm{Pa}$$

Question 10

An artery's diameter is reduced by 15% due to an occlusion, but the volume flow rate remains constant. By what factor has the pressure drop across the artery increased?

Accepted Answer

1.92

Question 11

A charge $$q = 10.0\ \mu\mathrm{C}$$ and mass $$m = 15.0\ \mathrm{mg} is $$attached to a spring ($$k = 35\ \mathrm{N/m}) $$between two parallel plates. The spring is stretched by $$2\ \mathrm{cm}. $$What is the strength of the electric field $$E$$?

Accepted Answer

$$E = 70.0\ \mathrm{kN/C}$$

Question 12

In the scenario with the charge $$q$$ attached to a spring between two parallel plates, which plate is positively charged?

Accepted Answer

The top plate

Question 13

A block is suspended by a spring scale above a beaker of water on a kitchen scale. When the block is fully submerged but still attached to the spring scale, what happens to the reading on the kitchen scale compared to when the block is not submerged?

Accepted Answer

It increases

Question 14

A standing wave in an organ pipe is shown with three nodes and two antinodes. If the speed of sound is $$343\ \mathrm{m/s}$$, what is the frequency of the standing wave if the pipe is $$2.75\ \mathrm{m}$$ long?

Accepted Answer

$$93.5\ \mathrm{Hz}$$

Question 15

A block is suspended by a spring scale and then placed at the bottom of a beaker of water (the string breaks). What is the total reading on the kitchen scale?

Accepted Answer

17.2 N

Question 16

A prospector finds a rock with a mass of 3.40 kg and a volume of $$3.84 	imes 10$$^{-4}$$\ \mathrm{m^3$}. If $$the rock contains granite and gold, what percentage of the rock's mass is gold?

Accepted Answer

81.2%

Question 17

In a U-tube experiment, oil is poured into one side until the oil column is $$H = 27.2 cm $$tall and the water level on the other side is $$h = 2.18 cm $$lower. Which equation correctly relates the densities and heights?

Accepted Answer

$$ho_{	ext{oil}} H = ho_{	ext{water}} h$$

Question 18

A garden hose is turned on but the nozzle is closed. Water leaks vertically to a height $$h$$ due to pressure. Which equation gives the pressure inside the hose?

Accepted Answer

$$P = \rho g h + P_0$

PHYS 1021 Problem Set 3 – Step-by-Step Physics Guidance

Study Guide - Practice Questions

Study Guide - Flashcards