Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
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Textbook Question
Chapter 20.1, Problem 20.1GI
The proton is a composite particle composed of three quarks, all of which are either up quarks (u; charge +
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What is the repulsive force (in N) between two protons if the distance between them is 171nm?
Helpful information: (1) An alpha particle is a helium nucleus, (2)
e = 1.6 × 10-¹⁹ C, (3) k = 9.0 × 10⁹ Nm² C-2, (4) 1nm = 1 × 10-⁹ m
1-An alpha particle lies on the x-axis, a distance of 1.0 nanometer from a
proton (in this set-up, the alpha particle is at the origin while the proton is in the
positive direction). Which of the following choices below represents the
magnitude of the electric force on the alpha particle?
(a) 2.3 × 10-10 N
(b) 4.6 × 10-¹0 N
(c) 2.3 × 10-19 N
(d) 4.6 × 10-19 N
eplacing the voltage sou
the following inst
choices below
time != 1.00 37
instantaneous current
I'm still confused about the step 2 part. How would I put this into my calculator? Where do the extra numbers 232.6 come from?
Chapter 20 Solutions
Essential University Physics (3rd Edition)
Ch. 20.1 - The proton is a composite particle composed of...Ch. 20.2 - Charge q1 is located at x = 1 m, y = 0. What...Ch. 20.3 - A positive point charge is located at the origin...Ch. 20.4 - Far from a charge distribution, you measure an...Ch. 20.5 - An electron, a proton, a deuteron (a neutron...Ch. 20 - Conceptual Example 20.1 shows that the...Ch. 20 - A free neutron is unstable and soon decays to...Ch. 20 - Where in Fig. 20.5 could you put a third charge so...Ch. 20 - Why should the test charge used to measure an...Ch. 20 - Equation 20.3 gives the electric field of a point...
Ch. 20 - Is the electric force on a charged particle always...Ch. 20 - Why does a dipole, which has no net charge,...Ch. 20 - The ring in Example 20.6 carries total charge Q,...Ch. 20 - A spherical balloon is initially uncharged. If you...Ch. 20 - Under what circumstances is the path of a charged...Ch. 20 - Why should there be a force between two dipoles,...Ch. 20 - Dipoles A and B are both located in the field of a...Ch. 20 - Suppose the electron and proton charges differed...Ch. 20 - A typical lightning flash delivers about 25 C of...Ch. 20 - Protons and neutrons are made from combinations of...Ch. 20 - Earth carries a net charge of about 5 105 C. How...Ch. 20 - As they fly, honeybees may acquire electric...Ch. 20 - The electron and proton in a hydrogen atom are...Ch. 20 - An electron at Earths surface experiences a...Ch. 20 - You break a piece of Styrofoam packing material,...Ch. 20 - A charge q is at the point x = 1 m, y = 0 m. Write...Ch. 20 - A proton is at the origin and an electron is at...Ch. 20 - An electron experiences an electric force of 0.61...Ch. 20 - Find the magnitude of the electric force on a...Ch. 20 - A 68-nC charge experiences a 150-mN force in a...Ch. 20 - The electric field inside a cell membrane is 8.0...Ch. 20 - A 1.0-C charge experiences a 10-N electric force...Ch. 20 - The electron in a hydrogen atom is 52.9 pm from...Ch. 20 - In Fig. 20.28, point P is midway between the two...Ch. 20 - The water molecules dipole moment is 6.2 1030Cm....Ch. 20 - The electric field 22 cm from a long wire carrying...Ch. 20 - Find the line charge density on a long wire if the...Ch. 20 - Find the magnitude of the electric field due to a...Ch. 20 - In his famous 1909 experiment that demonstrated...Ch. 20 - How strong an electric field is needed to...Ch. 20 - A proton moving to the right at 3.8l05m/s enters a...Ch. 20 - An electrostatic analyzer like that of Example...Ch. 20 - A 2-g ping-pong ball rubbed against a wool jacket...Ch. 20 - Two charges, one whose magnitude is twice as large...Ch. 20 - A proton is on the x-axis at x = 1.6 nm. An...Ch. 20 - A 9.5C charge is at x = 15cm, y = 5.0cm and a...Ch. 20 - A charge 3q is at the origin, and a charge 2q is...Ch. 20 - A negative charge q lies midway between two...Ch. 20 - In Fig. 20.29, take q1 = 68 C, q2 = 34 C, and q3 =...Ch. 20 - FIGURE 20.20 Problems 44 and 45 In Fig. 20.29,...Ch. 20 - DNA fragments introduced into an electrophoresis...Ch. 20 - A 65-C point charge is at the origin. Find the...Ch. 20 - A 1.0-C charge and a 2.0-C charge are 10 cm apart....Ch. 20 - A proton is at the origin and an ion is at x = 5.0...Ch. 20 - (a) Find an expression for the electric field on...Ch. 20 - A dipole lies on the y-axis and consists of an...Ch. 20 - Show that the field on the x-axis for the dipole...Ch. 20 - Youre 1.44 m from a charge distribution that is...Ch. 20 - Three identical charges q form an equilateral...Ch. 20 - Two identical small metal spheres initially carry...Ch. 20 - Two 38.0-C charges are attached to opposite ends...Ch. 20 - A thin rod lies on the x-axis between x = 0 and x...Ch. 20 - An electron is moving in a circular path around a...Ch. 20 - Find the line charge density on a long wire if a...Ch. 20 - A dipole with dipole moment 1.5 nCm is oriented at...Ch. 20 - You have a job examining patent applications....Ch. 20 - A 5.0-m strand of DNA carries charge +e per nm of...Ch. 20 - A molecule has its dipole moment aligned with a...Ch. 20 - Two identical dipoles, each of charge q and...Ch. 20 - A dipole with charges q and separation 2a is...Ch. 20 - An electron is at the origin, and an ion with...Ch. 20 - Youre taking physical chemistry, and your...Ch. 20 - The electric field on the axis of a uniformly...Ch. 20 - An electric quadrupole consists of two oppositely...Ch. 20 - You measure the electric field on a dipoles axis,...Ch. 20 - A straight wire 10 m long carries 25 C distributed...Ch. 20 - Figure 20.34 shows a thin rod of length L carrying...Ch. 20 - Figure 20.35 shows a thin, uniformly charged disk...Ch. 20 - Use the result of Problem 73 to show that the...Ch. 20 - Use the binomial theorem to show that, for x R,...Ch. 20 - A semicircular loop of radius a carries positive...Ch. 20 - In Example 20.2, find the position on the y-axis...Ch. 20 - A thin rod carries charge Q distributed uniformly...Ch. 20 - A thin rod extends along the x-axis from x = 0 to...Ch. 20 - A rod of length 2L lies on the x-axis, centered at...Ch. 20 - Youre working on the design of an ink-jet printer....Ch. 20 - BIO The human heart consists largely of elongated...Ch. 20 - At a given distance, far from the heart compared...Ch. 20 - The difference between Figs. 20.38a and 20.38b...Ch. 20 - At the instant shown in Fig. 20.38c, theres an...
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- At what distance would be repulsive forces between two protons have a magnitude3.00 N?arrow_forwardThe strong force between nucleons has a magnitude of approximately 2.5 × 104 N for two nucleons whose centers are 1.0 fm apart. What is the electrostatic force between two protons this distance apart? Compare the electrostatic force to the strong force.arrow_forwardThe quark compositions of the proton and neutron are, respectively, uud and udd, where u is an up quark (charge + 23 e2 and d is a down quark (charge - 13 e2. There are also antiup u (charge - 23 e2 and antidown d (charge + 13 e2 quarks. The combination of a quark and an antiquark is called a meson. The mesons known as pions have the composition p+ = ud and p- = ud. Suppose a proton collides with an antineutron. During such collisions, the various quarks and antiquarks annihilate whenever possible. When the remaining quarks combine to form a single particle, it is aA. Proton B. Neutron C. p+ D. parrow_forward
- Considering electron and proton as two charged particles separated by d = 5.7 × 10-11 m calculate the gravitational force between the proton and electron and find its ratio to the Coulomb force. Take the mass of the proton 1.7 × 10¬2 kg, the mass of the electron 9.1 × 10¬3' kg, the value of the universal 1 = 9 x 10° m/F. Give the answer for the gravitational force in 10" gravitational constant 6.7 x 10-11 N kg?m² , the electron charge –1.6 × 10-19 c and 4πεο 47 N.arrow_forwardAll stars have to be electrically charge neutral, since the gravitational force is about 1036 times weaker than the electromagnetic force. Calculate what is the maximum ratio of charged particle per nucleon Z/A you can have in a star, so it does not expel a proton from the surface. In other words, the gravitational force between a proton and the remaining star must be larger than the Coulomb's force. Use that the gravitational mass of the star M is less than the baryonic mass mpA.arrow_forwardA synchrotron of 25 m radius accelerates protons from a kinetic energy of 50 to 1000 MeV in 1 second. The dipole magnets saturate at 1000 MeV. i) What is the maximal kinetic energy of a deuteron that it could accelerate? ii) Calculate the revolution frequency for protons and deuterons.arrow_forward
- Consider (Figure 1) showing a proton approaching a helium-3 nucleus that has two protons and one neutron. Figure 1 of 1 Proton Helium-3 nucleus Initial 9= +2e Зт 9 = +e m To = 0 v = 0 Final (the proton is at rest)arrow_forward27. A cyclotron (Fig. 29.16) designed to accelerate pro- tons has an outer radius of 0.350 m. The protons are emitted nearly at rest from a source at the center and are accelerated through 600 V each time they cross the gap between the dees. The dees are between the poles of an electromagnet where the field is 0.800 T. (a) Find the cyclotron frequency for the protons inarrow_forwardThe protons in a nucleus are approximately 2 ✕ 10−15 m apart. Consider the case where the protons are a distance d = 1.85 ✕ 10−15 m apart. Calculate the magnitude of the electric force (in N) between two protons at this distance.arrow_forward
- As a multiple of e1 what is the charge q1 of the particle that is composed of the quark combination udd? q1 = ? e As a multiple of e1 what is the charge q2 of the particle that is composed of the quark combination dds? q2 = ? earrow_forward7636Kr + 0-1e → ? a) it is n (mass # : 1; charge:0) b) no right answer c) it is Br (mass # : 76; protons: 35) d) it is C (mass #: 14; protons 6) e) it is e ( mass #: 0 ; charge +1)arrow_forwardA cyclotron used to accelerate protons has a maximum radius of 0.4 m and the magnetic induction used is one tesla. Find the frequency of oscillator connected to the dees and the maximum velocity of emerging protons. Through what P.D. must the protons be accelerated from rest to achieve this speed? If deuterons are used instead of protons, what would be their final energy? Mp= 1.67 x 10-27 kg.arrow_forward
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