All Matches
Solution Library
Expert Answer
Textbooks
Search Textbook questions, tutors and Books
Oops, something went wrong!
Change your search query and then try again
Toggle navigation
FREE Trial
S
Books
FREE
Tutors
Study Help
Expert Questions
Accounting
General Management
Mathematics
Finance
Organizational Behaviour
Law
Physics
Operating System
Management Leadership
Sociology
Programming
Marketing
Database
Computer Network
Economics
Textbooks Solutions
Accounting
Managerial Accounting
Management Leadership
Cost Accounting
Statistics
Business Law
Corporate Finance
Finance
Economics
Auditing
Ask a Question
Search
Search
Sign In
Register
study help
physics
college physics a strategic approach 2nd
Questions and Answers of
College Physics A Strategic Approach 2nd
A 3.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 50-cm-long nichrome wire. What is the current in the wire?
Figure Q22.28 shows a side view of a wire of varying circular cross section. Rank in order the currents flowing in the three sections. ½ FIGURE Q22.28
A 1.0-mm-diameter, 20-cm-long copper wire carries a 3.0 A current. What is the potential difference between the ends of the wire?
Figure P22.31 is a current-versus-potential-difference graph for a cylinder. What is the cylinder's resistance? 1 (A) 24 0- 0 50 FIGURE P22.31 -AV (V) 100
A person gains weight by adding fat and therefore adding girth to his body and his limbs, with the amount of muscle remaining constant. How will this affect the electrical resistance of his limbs?A.
A small electric lap blanket contains a 40-foot-long wire wrapped back and forth inside. An 18 V supply creates a current in this wire, warming it and thus the blanket. What is the electric field
Two identical lightbulbs are connected in series to a single 9.0 V battery. a. Sketch the circuit. b. Sketch a graph showing the potential as a function of distance through the circuit, starting
You've brought your 1000 W (120 V) hair dryer on vacation to Europe, where the standard outlet voltages are 230 V. Assuming the hair dryer can operate safely at the higher voltage, can you actually
A 70 W electric blanket runs at 18 V. a. What is the resistance of the wire in the blanket? b. How much current does the wire carry?
A 60-cm-long heating wire is connected to a 120 V outlet. If the wire dissipates 45 W, what are(a) The current in(b) The resistance of the wire?
A 3.0 V battery powers a flashlight bulb that has a resistance of 6.0 Ω. How much charge moves through the battery in 10 min?
For a science experiment you need to electroplate a 100-nm-thick zinc coating onto both sides of a very thin, 2.0 cm x 2.0 cm copper sheet. You know that the charge carriers in the ionic solution are
The hot dog cooker described in the chapter heats hot dogs by connecting them to 120 V household electricity. A typical hot dog has a mass of 60 g and a resistance of 150 Ω N. How long will it take
A 40 W (120 V) lightbulb has a tungsten filament of thickness 0.040 mm. The filament's operating temperature is 1500°C.a. How long is the filament? b. What is the resistance of the filament at
When the starter motor on a car is engaged, there is a 300 A current in the wires between the battery and the motor. Suppose the wires are made of copper and have a total length of 1.0 m. What
A wire is 2.3 m long and has a diameter of 0.38 mm. When connected to a 1.2 V battery, there is a current of 0.61 A. What material is the wire likely made of?
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.0 g of copper and asked to make a wire, using all the metal, with a resistance of 1.0 Ω. Copper has a density of
Not too long ago houses were protected from excessive cur- rents by fuses rather than circuit breakers. Sometimes a fuse blew out and a replacement wasn't at hand. Because a copper penny happens to
An immersion heater used to boil water for a single cup of tea plugs into a 120 V outlet and is rated at 300 W. a. What is the resistance of the heater? b. Suppose your super-size, super-insulated
Is it ever possible for one sound wave in air to overtake and pass another? Explain.
Which has the greater density, 1 g of mercury or 1000 g of water?
A 100 mL beaker holds 120 g of liquid. What is the liquid's density in SI units?
Containers A and B have equal volumes. Container A holds helium gas at 1.0 atm pressure and 20°C. Container B is completely filled with a liquid whose mass is 7600 times the mass of helium gas in
You are given an irregularly shaped chunk of material and asked to find its density. List the specific steps that you would follow to do so.
Air enclosed in a sphere has density p = 1.4 kg/m3. What will the density be if the radius of the sphere is halved, com- pressing the air within?
Object 1 has an irregular shape. Its density is 4000 kg/m3.a. Object 2 has the same shape and dimensions as object 1, but it is twice as massive. What is the density of object 2? b. Object 3 has the
When you get a blood transfusion the bag of blood is held above your body, but when you donate blood the collection bag is held below. Why is this?
To explore the bottom of a 10-m-deep lake, your friend Tom proposes to get a long garden hose, put one end on land and the other in his mouth for breathing underwater, and descend into the depths.
Ethyl alcohol has been added to 200 mL of water in a container that has a mass of 150 g when empty. The resulting container and liquid mixture has a mass of 512 g. What volume of alcohol was added to
Helium-filled weather balloons are spherical when they reach very high altitudes. However, they are only partially inflated with helium before they are released. Explain why this is done.
A 35-cm-tall, 5.0-cm-diameter cylindrical beaker is filled to its brim with water. What is the downward force of the water on the bottom of the beaker?
Water expands when heated. Suppose a beaker of water is heated from 10°C to 90°C. Does the pressure at the bottom of the beaker increase, decrease, or stay the same? Explain.
Rank in order, from largest to smallest, the densities of objects A, B, and C in Figure Q13.15. Explain. A B FIGURE Q13.15 C
What is the gas pressure inside the box shown in Figure P13.16? gas 16 cm -Mercury FIGURE P13.16 6.0 cm
Refer to Figure Q13.16. Now A, B, and C have the same density, but still have the masses given in the figure. Rank in order, from largest to smallest, the sizes of the buoyant forces on A, B, and C.
Two pipes have the same inner cross-section area. One has a circular cross section and the other has a rectangular cross section with its height one-tenth its width. Through which pipe, if either,
An oil layer floats on 85 cm of water in a tank. The absolute pressure at the bottom of the tank is 112.0 kPa. How thick is the oil?
The little Dutch boy saved Holland by sticking his finger in the leaking dike. If the water level was 2.5 m above his finger, estimate the force of the water on his finger.
A 6.0-cm-tall cylinder floats in water with its axis perpendicular to the surface. The length of the cylinder above water is 2.0 cm. What is the cylinder's mass density?
A flat slab of styrofoam, with a density of 32 kg/m3, floats on a lake. What minimum volume must the slab have so that a 40 kg boy can sit on the slab without it sinking?
A child's water pistol shoots water through a 1.0-mm-diameter hole. If the pistol is fired horizontally 70 cm above the ground, a squirt hits the ground 1.2 m away. What is the volume flow rate
The leaves of a tree lose water to the atmosphere via the process of transpiration. A particular tree loses water at the rate of 3 × 10-8 m3/s; this water is replenished by the upward flow of sap
Figure P13.62 shows a section of a long tube that narrows near its open end to a diameter of 1.0 mm. Water at 20°C flows out of the open end at 0.020 L/s. What is the gauge pressure at point P,
Water flows at 5.0 L/s through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What is the reading of a pressure
Suppose that in response to some stimulus a small blood vessel narrows to 90% its original diameter. If there is no change in the pressure across the vessel, what is the ratio of the new volume flow
Sustained exercise can increase the blood flow rate of the heart by a factor of 5 with only a modest increase in blood pressure. This is a large change in flow. Although several factors come into
A person's heart rate is given in beats per minute. Is this a period or a frequency?
Figure Q14.3 shows the position-versus-time graph of a particle in SHM. a. At what time or times is the particle moving to the right at maximum speed? b. At what time or times is the particle
In the aftermath of an intense earthquake, the earth as a whole "rings" with a period of 54 minutes. What is the frequency (in Hz) of this oscillation?
In taking your pulse, you count 75 heartbeats in 1 min. What are the period (in s) and frequency (in Hz) of your heart's oscillations?
Make a table with 3 columns and 8 rows. In row 1, label the columns θ (°),θ (rad), and sineθ. In the left column, starting in row 2, write 0, 2, 4, 6, 8, 10, and 12. a. Convert each of these
A heavy steel ball is hung from a cord to make a pendulum. The ball is pulled to the side so that the cord makes a 5° angle with the vertical. Holding the ball in place takes a force of 20 N. If the
What are the (a) amplitude and (b) frequency of the oscillation shown in Figure P14.8? x (cm) 10 MA 2 3 4 5 0 -5- -10- FIGURE P14.8 -t (s)
A block oscillating on a spring has a maximum kinetic energy of 2.0 J. What will be the maximum kinetic energy if the amplitude is doubled? Explain.
A block oscillating on a spring has a maximum speed of 30 cm/s. What will be the block's maximum speed if the initial elongation of the spring is doubled?
For the graph in Figure Q14.8, determine the frequency f and the oscillation amplitude A. x (cm) 10 0 -10 MA 4 2 FIGURE Q14.8 -1 (s)
What are the (a) amplitude and (b) frequency of the oscillation shown in Figure P14.9? x (cm) AA 2 6 8 20 10 0 -10 -20- FIGURE P14.9 -1 (s)
For the graph in Figure Q14.9, determine the frequency f and the oscillation amplitude A. v (cm/s) 10 0 M 2 -10 FIGURE Q14.9 4 -t (s)
An object in simple harmonic motion has an amplitude of 6.0 cm and a frequency of 0.50 Hz. Draw a position graph showing two cycles of the motion.
During an earthquake, the top of a building oscillates with an amplitude of 30 cm at 1.2 Hz. What are the magnitudes of (a) The maximum displacement, (b) The maximum velocity,(c) The maximum
Some passengers on an ocean cruise may suffer from motion sickness as the ship rocks back and forth on the waves. At one position on the ship, passengers experience a vertical motion of amplitude 1 m
Flies flap their wings at frequencies much too high for pure muscle action. A hypothesis for how they achieve these high frequencies is that the flapping of their wings is the driven oscillation of a
A passenger car traveling down a rough road bounces up and down at 1.3 Hz with a maximum vertical acceleration of 0.20 m/s2, both typical values. What are the (a) Amplitude.(b) Maximum speed of the
The New England Merchants Bank Building in Boston is 152 m high. On windy days it sways with a frequency of 0.17 Hz, and the acceleration of the top of the building can reach 2.0% of the free-fall
If you want to play a tune on wine glasses, you'll need to adjust the oscillation frequencies by adding water to the glasses. This changes the mass that oscillates (more water means more mass) but
Sprinters push off from the ball of their foot, then bend their knee to bring their foot up close to the body as they swing their leg forward for the next stride. Why is this an effective strategy
Gibbons move through the trees by swinging from successive handholds, as we have seen. To increase their speed, gibbons may bring their legs close to their bodies. How does this help them move more
Humans have a range of hearing of approximately 20 Hz to 20 kHz. Mice have auditory systems similar to humans, but all of the physical elements are smaller. Given this, would you expect mice to have
A person driving a truck on a "washboard" road, one with regularly spaced bumps, notices an interesting effect: When the truck travels at low speed, the amplitude of the vertical motion of the car is
A 507 g mass oscillates with an amplitude of 10.0 cm on a spring whose spring constant is 20.0 N/m. Determine:a. The period. b. The maximum speed.c. The total energy.
Figure Q14.23 represents the motion of a mass on a spring.a. What is the period of this oscillation? A. 12 s B. 24 s C. 36 s D. 48 s E. 50 sb. What is the amplitude of the oscillation? A. 1.0
We've seen that stout tendons in the legs of hopping kangaroos store energy. When a kangaroo lands, much of the kinetic energy of motion is converted to elastic energy as the tendons stretch,
If you carry heavy weights in your hands, how will this affect the natural frequency at which your arms swing back and forth? A. The frequency will increase. B. The frequency will stay the
Suppose you travel to the moon, and you take with you two timepieces: a pendulum clock and a wristwatch that runs with a wheel and a mainspring. (The wheel and spring work, essentially, like a mass
The free-fall acceleration on the moon is 1.62 m/s2. What is the length of a pendulum whose period on the moon matches the period of a 2.00-m-long pendulum on the earth?
Very loud sounds can damage hearing by injuring the vibration-sensing hair cells on the basilar membrane. Suppose a person has injured hair cells on a segment of the basilar mem- brane close to the
A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 10-m-long cable. You are (unwisely!) standing directly beneath the point from which the wrecking
A pendulum clock keeps time by the swinging of a uniform solid rod pivoted at one end. The angular position of the rod is given by θ(t) = (0.175 rad) sin(πt), where t is in seconds. a. What is the
You and your friends find a rope that hangs down 15 m from a high tree branch right at the edge of a river. You find that you can run, grab the rope, and swing out over the river. You run at 2.0 m/s
A thin, circular hoop with a radius of 0.22 m is hanging from its rim on a nail. When pulled to the side and released, the hoop swings back and forth as a physical pendulum. The moment of inertia of
When you drive your car over a bump, the springs connecting the wheels to the car compress. Your shock absorbers then damp the subsequent oscillation, keeping your car from bouncing up and down on
A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamp- post is 6.5 cm at the moment the quake stops, and 8.0 s later it is 1.8 cm. a.
Your car rides on springs, so it will have a natural frequency of oscillation. Figure P14.40 shows data for the amplitude of motion of a car driven at different frequencies. The car is driven at 20
A 25 kg child sits on a 2.0-m-long rope swing. You are going to give the child a small, brief push at regular intervals. If you want to increase the amplitude of her motion as quickly as possible,
A spring has an unstretched length of 12 cm. When an 80 g ball is hung from it, the length increases by 4.0 cm. Then the ball is pulled down another 4.0 cm and released. a. What is the spring
A 0.40 kg ball is suspended from a spring with spring constant 12 N/m. If the ball is pulled down 0.20 m from the equilibrium position and released, what is its maximum speed while it oscillates?
As we've seen, astronauts measure their mass by measuring the period of oscillation when sitting in a chair connected to a spring. The Body Mass Measurement Device on Skylab, a 1970s space station,
Two 50 g blocks are held 30 cm above a table. As shown in Figure P14.59, one of them is just touching a 30-cm-long spring. The blocks are released at the same time. The block on the left hits the
Four people with a combined mass of 300 kg are riding in a 1100 kg car. When they drive down a washboard road with bumps spaced 5.0 m apart, they notice that the car bounces up and down with a
Bungee Man is a superhero who does super deeds with the help of Super Bungee cords. The Super Bungee cords act like ideal springs no matter how much they are stretched. One day, Bungee Man stopped a
The earth's free-fall acceleration varies from 9.78 m/s2 at the equator to 9.83 m/s2 at the poles. A pendulum whose length is precisely 1.000 m can be used to measure g. Such a device is called a
A pendulum clock has a heavy bob supported on a very thin steel rod that is 1.00000 m long at 20°C. a. To 6 significant figures, what is the clock's period? Assume that g is 9.80 m/s2 exactly. b.
A pendulum consists of a massless, rigid rod with a mass at one end. The other end is pivoted on a frictionless pivot so that it can turn through a complete circle. The pendulum is inverted, so the
a. In your own words, define what a transverse wave is. b. Give an example of a wave that, from your own experience. you know is a transverse wave. What observations or evidence tells you this is a
The wave speed on a string under tension is 200 m/s. What is the speed if the tension is doubled?
a. In your own words, define what a longitudinal wave is. b. Give an example of a wave that, from your own experience, you know is a longitudinal wave. What observations or evidence tells you this
A wave travels along a string at a speed of 280 m/s. What will be the speed if the string is replaced by one made of the same material and under the same tension but having twice the radius?
The back wall of an auditorium is 26.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound
An ultrasonic range finder sends out a pulse of ultrasound and measures the time between the emission of the pulse and the return of an echo from an object. This time is used to determine the
In an early test of sound propagation through the ocean, an underwater explosion of 1 pound of dynamite in the Bahamas was detected 3200 km away on the coast of Africa. How much time elapsed between
Showing 600 - 700
of 1627
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Last