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 negative acceleration can cause(a) an increase in speed,(b) a decrease in speed,(c) either (a) or (b).
The gas pedal of an automobile is commonly referred to as the accelerator. Which of the following might also be called an accelerator: (a) the brakes, (b) the steering wheel, (c) the gear shift, or
For a constant acceleration, what changes uniformly?(a) acceleration, (b) velocity, (c) displacement,(d) distance.
Which one of the following is true for a deceleration?(a) The velocity remains constant. (b) The acceleration is negative. (c) The acceleration is in the direction opposite to the velocity. (d) The
For a constant linear acceleration, the velocity-versus time graph is (a) a horizontal line, (b) a vertical line,(c) a non-horizontal and non-vertical straight line,(d) a curved line.
For a constant linear acceleration, the position-versus time graph would be (a) a horizontal line, (b) a vertical line, (c) a non-horizontal and non-vertical straight line,(d) a curve.
Example In January 2004, a Mars Exploration Rover touched down on the surface of Mars and rolled out for exploration (▼ Figure
A couple in a sport-utility vehicle (SUV) is traveling at 90 km/h on a straight highway. The driver sees an accident in the distance and slows down to 40 km/h in
As discussed, the metric unit of mass was originally related to length, with a liter (1000 cm3) of water having a mass of 1 kg. The standard metric unit of volume is the cubic meter (m3) and this
A professor puts two equations on the board: (a) v = vo + at and(b) x = v/(2a), where x is distance in meters (m); v and vo are velocities in meters/second (m/s); a is acceleration
The world record of men’s pole vault is 6.16 m while the female record is 5.06 m. What is the difference in these heights in feet?THINKING IT THROUGH. After using the correct conversion factor,
Capillaries, the smallest blood vessels of the body, connect the arterial system with the venous system and supply our tissues with oxygen and nutrients (Figure 1.8). It is estimated that if all of
A hall bulletin board has an area of 2.5 m2. What is this area in(a) square centimeters (cm2) and (b) square inches (in2)?THINKING IT THROUGH. This problem is a conversion of area units, and we know
A grocery store has a sale on sodas. A 2-liter bottle sells for \($1.35,\) and the price of a half-gallon bottle is \($1.32.\) Which is the better buy?THINKING IT THROUGH. The answer is obtained by
The following operations are performed by finding the number that has the least number of decimal places.
A closed cylindrical container used to store material from a manufacturing process has an outside radius of 50.0 cm and a height of 1.30 m. What is the total outside surface area of the
(a) A gardener has a rectangular plot measuring 3.0 m × 4.0 m. She wishes to use half of this area to make a triangular flower bed. Of the two types of triangles shown in Figure 1.12, which should
A medical technologist draws 15 cc (cubic centimeter) of blood from a patient’s vein. Back in the lab, it is determined that this volume of blood has a mass of 16 g. Estimate the density of the
The blood volume in the human body varies with a person’s age, body size, and sex. On average, this volume is about 5.0 L. A typical value of red blood cells (erythrocytes) per volume is 5 000
How many base units are there in the SI: (a) 3, (b) 5,(c) 7, or (d) 9?
The only SI standard represented by material standard or artifact is the (a) meter, (b) kilogram, (c) second,(d) electric charge.
Which of the following is the SI base unit for mass:(a) pound, (b) gram, (c) kilogram, or (d) metric ton?
The prefix giga- means (a) 10−9, (b) 109, (c) 10−6, (d) 106.
The prefix micro- means (a) 106, (b) 10−6, (c) 103, (d) 10−3.
A new technology is concerned with objects the size of what metric prefix: (a) nano-, (b) micro-, (c) mega-, or(d) giga-?
Which of the following has the greatest volume: (a) 1 L,(b) 1 qt, (c) 2000 μL, or (d) 2000 mL?
Which of the following metric prefixes is the smallest:(a) micro-, (b) centi-, (c) nano-, or (d) milli-?
Both sides of an equation are equal in (a) numerical value, (b) units, (c) dimensions, (d) all of the preceding.
Unit analysis of an equation cannot tell you if(a) the equation is dimensionally correct,(b) the equation is physically correct,(c) the numerical value is correct,(d) both (b) and (c).
A good way to ensure proper unit conversion is (a) to use another measurement instrument, (b) always work in the same system of units, (c) use unit analysis,(d) have someone check your math.
You often see 1 kg = 2.2 lb. This expression means that(a) 1 kg is equivalent to 2.2 lb, (b) this is a true equation,(c) 1 lb = 2.2 kg, (d) none of the preceding.
You have a quantity of water and wish to express this in volume units that give the largest value. Which of the following units should be used: (a) in3, (b) mL, (c) μL, or(d) cm3?
Which of the following has the greatest number of significant figures: (a) 103.07, (b) 124.5, (c) 0.09916, or(d) 5.408 × 105?
Which of the following numbers has four significant figures: (a) 140.05, (b) 276.02, (c) 0.004 006, or(d) 0.073 004?
In a multiplication and/or division operation involving the numbers 15 437, 201.08, and 408.0 × 105, the result should have how many significant figures: (a) 3, (b) 4,(c) 5, or (d) any number?
An important step in problem solving before mathematically solving an equation is (a) checking units, (b) checking significant figures, (c) checking with a friend,(d) checking to see if the result
An important final step in problem solving before reporting an answer is (a) saving your calculations,(b) reading the problem again, (c) seeing if the answer is reasonable, (d) checking your results
In order-of-magnitude calculations, you should (a) pay close attention to significant figures, (b) work primarily in the British system, (c) get results within a factor of 100,(d) express a quantity
What replaced the original definition of the second and why? Is the replacement still used?
Give a couple of major differences between the SI and the British system.
Explain why 1 mL is equivalent to 1 cm3.
Can unit analysis tell you whether you have used the correct equation in solving a problem? Explain.
The equation for the area of a circle from two sources is given as A = πr2 and A = πd2/2. Can unit analysis tell you which is correct? Explain.
How might unit analysis help determine the units of a quantity?
Are an equation and an equivalence statement the same? Explain.
Does it make any difference whether you multiply or divide by a conversion factor? Explain.
A popular saying is “Give him an inch and he’ll take a mile.” What would be the equivalent numerical values and units in the metric system?
What is the purpose of significant figures?
Are all the significant figures reported for a measured value accurately known? Explain.
How are the number of significant figures determined for the results of calculations involving (a) multiplication,(b) division, (c) addition, and (d) subtraction?
What are the main steps in the problem-solving procedure suggested in this chapter?
When you do order-of-magnitude calculations, should you be concerned about significant figures? Explain.
When doing an order-of-magnitude calculation, how accurate can you expect the answer to be? Explain.
Is the following statement reasonable? It took 300 L of gasoline to fill the car’s tank. (Justify your answer.)
Is the following statement reasonable? A car traveling 30 km/h through a school speed zone exceeds the speed limit of 25 mi/h.
If x refers to distance, vo, and v to velocities, a to acceleration, and t to time, which of the following equations is dimensionally correct: (a) x = vote + at3,(b) v2 = vo 2 + 2at, (c) x = at +
Use SI unit analysis to show that the equation for the surface area of a sphere A = 4πr2, where A is the area and is the radius of a sphere, is dimensionally correct.
You are told that the volume of a sphere is given by V = πd3/6, where V is the volume and d is the diameter of the sphere. Is this equation dimensionally correct?
Is the equation for the area of a trapezoid, A = 1/2[a(b1 + b2)], where a is the height and b1 and b2 are the bases, dimensionally correct (▼ Figure 1.13)? -b- -b- FIGURE 1.13 The area of a
How many (a) quarts and (b) gallons are there in 10.0 L?
The sailfish is the fastest fish in the world – able to swim at a speed of 68 miles per hour (▼ Figure 1.14).(a) What is this speed expressed in m/s? (b) How long would it take the fish to travel
Using a meterstick, a student measures a length and reports it to be 0.8755 m. What is the smallest division on the meterstick scale?
The cover of your physics book measures 0.274 m long and 0.222 m wide. What is its area in square meters?
The Channel Tunnel, or “Chunnel,” which runs under the English Channel between Great Britain and France is 31 mi long. (There are actually three separate tunnels.) A shuttle train that carries
What kind of decay, if any, would you expect for the nuclei with the energy-level diagrams shown in Figure Q30.16? Energy (a) 22 22- Neutrons FIGURE Q30.16 Protons Energy
A patient's tumor is irradiated with gamma rays from an external source. Afterward, is his body radioactive? Explain.
It's possible that a bone tumor will not show up on an x-ray image but will show up in a gamma scan. Explain why this is so.
Four radiation doses are as follows: Dose A is 10 rad with an RBE of 1, dose B is 20 rad with an RBE of 1, dose C is 10 rad with an RBE of 2, and dose D is 20 rad with an RBE of 2. a. Rank in order,
Two different sources of radiation give the same dose equivalent in Sv. Does this mean that the radiation from each source has the same RBE? Explain.
Some types of MRI can produce images of resolution and detail similar to PET. Though the images are similar, MRI is generally preferred over PET for studies of brain function involving healthy
Sulfur colloid particles tagged with 99Tc are taken up and retained by cells in the liver and spleen. A patient is suspected of having a liver tumor that would destroy these cells. Explain how a
The first two letters in the acronym SPECT, which describes a nuclear imaging technique, stand for "single photon." Is a SPECT done with a gamma emitter or a positron emitter?
A certain watch's luminous glow is due to zinc sulfide paint that is energized by beta particles given off by tritium, the radioactive hydrogen isotope 3H, which has a half-life of 12.3 years. This
A significant fraction of the radiation dose you will receive during your life comes from radioactive materials in your body. The most important source of this radiation is the potassium isotope 40K,
Oil and coal generally contain no measurable 14C. What does this tell us about how long they have been buried?
Four samples each contain a single radioactive isotope. Sample A has 1 mol of matter and an activity of 100 Bq. Sample B has 10 mol and 100 Bq, sample C has 100 mol and 100 Bq, and sample D has 100
Figure Q30.7 shows how the number of nuclei of one particular isotope varies with time. What is the half-life of the nucleus? N 1,000,000- 250,000- 0+ 0 FIGURE Q30.7 8 days
A radioactive sample has a half-life of 10 s. 10,000 nuclei are present at t = 20 s. a. How many nuclei were there at t = 0 s? b. How many nuclei will there be at t = 40 s?
For each nuclear energy-level diagram in Figure Q30.6, state whether it represents a nuclear ground state, an excited nuclear state, or an impossible nucleus. Energy (a) 22 + 22- Neutrons
A sample contains a mix of isotopes of an element. Using a spectrometer to measure the spectrum of emitted light will not reveal the mix of isotopes; analyzing the sample with a mass spectrometer
A "soft x-ray" photon with an energy of 41.8 eV is absorbed by a hydrogen atom in its ground state, knocking the atom's electron out. What is the speed of the electron as it leaves the atom? A. 1.84
Atom A has a larger atomic mass than atom B. Does this mean that atom A also has a larger atomic number? Explain.
The angular momentum of an electron in a Bohr hydrogen atom is 3.18 × 10-34 kg. m2/s. What is the atom's energy?A. - 13.60 eV B. -6.73 eV C. -3.40 eVD. -1.51 eVE. -0.47 eV
A glass tube contains 2 x 1011 atoms, some of which are in the ground state and some of which are excited. Figure Q29.22 shows the populations for the atoms' three energy levels. Is it possible for
An atom emits a photon with a wavelength of 275 nm. By how much does the atom's energy change?A. 0.72 eV B. 1.06 eV C. 2.29 eVD. 3.06 eVE. 4.51 eV
What is the length of a box in which the difference between an electron's first and second allowed energies is 1.0 X 10-19 J?
A silicon solar cell looks like a battery with a 0.50 V terminal voltage. Suppose that 1.0 W of light of wavelength 600 nm falls on a solar cell and that 50% of the photons give their energy to
The wavelength of the radiation in a microwave oven is 12 cm. How many photons are absorbed by 200 g of water as it's heated from 20°C to 90°C?
The human body emits thermal electromagnetic radiation, as we've seen. Assuming that all radiation is emitted at the wave- length of peak intensity, for a skin temperature of 33°C and a surface area
Figure P28.39 is an energy-level diagram for a quantum system. What wavelengths appear in the system's emission spectrum? FIGURE P28.39 n=3 n = 2 n = 1 -E₂ = 4.0 eV -E₂ = 1.5 eV -E₁ = 0.0 eV
The allowed energies of a quantum system are 0.0 eV, 4.0 eV, and 6.0 eV.a. Draw the system's energy-level diagram. Label each level with the energy and the quantum number. b. What wavelengths appear
The allowed energies of a quantum system are 1.0 eV, 2.0 eV, 4.0 eV, and 7.0 eV. What wavelengths appear in the system's emission spectrum?
Dinoflagellates are single-cell creatures that float in the world's oceans; many types are bioluminescent. When disturbed by motion in the water, a typical bioluminescent dinoflagellate emits
When an ultraviolet photon is absorbed by a molecule of DNA, the photon's energy can be converted into vibrational energy of the molecular bonds. Excessive vibration damages the molecule by causing
An LC circuit is built with a 20 mH inductor and an 8.0 μF capacitor. The current has its maximum value of 0.50 A at t = 0 s. How long does it take until the capacitor is fully charged?
In a nuclear magnetic resonance spectrometer, a 15 mH coil is designed to detect an emf oscillating at 400 MHz. The coil is part of an RLC circuit. What value of the capacitance C should be used so
Your computer has a built-in "surge protector." A surge is a sudden increase in voltage on the power line. This causes a rapid "current spike" that can destroy sensitive electronic components. After
Your cell phone charger plugs into an AC electric outlet. A typical charger has a two-prong plug. Either prong can go in the hot side of the outlet; that is, you can reverse the plug and the charger
A circuit breaker won't keep you from getting a shock; a GFI will. Explain why this is so.
An 1.1-m-diameter MRI solenoid with a length of 2.4 m has a magnetic field of 1.5 T along its axis. If the current is turned off in a time of 1.2 s, what is the induced emf in one turn of the
Showing 200 - 300
of 1627
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Last