EBK PHYSICS FOR SCIENTISTS AND ENGINEER
9th Edition
ISBN: 9780100460300
Author: SERWAY
Publisher: YUZU
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Chapter 23, Problem 23.7P
Review. A molecule of DNA (deoxyribonucleic acid) is 2.17μm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.00% upon becoming charged. Determine the effective spring constant of the molecule.
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A molecule of DNA (deoxyribonucleic acid) is 2.17μm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.00% upon becoming charged. Determine the effective spring constant of the molecule.
A molecule of DNA (deoxyribonucleic acid) is 2.29 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.81% upon becoming charged. Determine the effective spring constant of the molecule.
You are working in a biology lab during your summer break. Your supervisor asks you to perform an experiment to find the effective spring constant (in N/m) of a partial molecule of DNA (deoxyribonucleic acid). You perform experiments and find that a single straight portion of a DNA molecule is 2.32 µm long. You then perform an activity that charges the ends of the molecule; each end becomes singly ionized: negative on one end, positive on the other. After the ends are charged, the molecule shrinks by 1.25% of its length.
Use the particle in equilibrium model to balance the electric and elastic forces on a particle at one of the ends of the molecule. N/m
Chapter 23 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 23 - Three objects are brought close to each other, two...Ch. 23 - Three objects are brought close to one another,...Ch. 23 - Object A has a charge of +2 C, and object B has a...Ch. 23 - A test charge of +3 C is at a point P where an...Ch. 23 - Rank the magnitudes of the electric field at...Ch. 23 - A free electron and a free proton are released in...Ch. 23 - Prob. 23.2OQCh. 23 - A very small ball has a mass of 5.00 103 kg and a...Ch. 23 - An electron with a speed of 3.00 106 m/s moves...Ch. 23 - A point charge of 4.00 nC is located at (0, 1.00)...
Ch. 23 - A circular ring of charge with radius b has total...Ch. 23 - What happens when a charged insulator is placed...Ch. 23 - Estimate the magnitude of the electric field due...Ch. 23 - (i) A metallic coin is given a positive electric...Ch. 23 - Assume the charged objects in Figure OQ23.10 are...Ch. 23 - Three charged particles are arranged on corners of...Ch. 23 - Two point charges attract each other with an...Ch. 23 - Assume a uniformly charged ring of radius R and...Ch. 23 - An object with negative charge is placed in a...Ch. 23 - The magnitude of the electric force between two...Ch. 23 - (a) Would life be different if the electron were...Ch. 23 - A charged comb often attracts small bits of dry...Ch. 23 - A person is placed in a large, hollow, metallic...Ch. 23 - A student who grew up in a tropical country and is...Ch. 23 - If a suspended object A is attracted to a charged...Ch. 23 - Consider point A in Figure CQ23.6 located an...Ch. 23 - In fair weather, there is an electric field at the...Ch. 23 - Why must hospital personnel wear special...Ch. 23 - A balloon clings to a wall after it is negatively...Ch. 23 - Consider two electric dipoles in empty space. Each...Ch. 23 - A glass object receives a positive charge by...Ch. 23 - Find to three significant digits the charge and...Ch. 23 - (a) Calculate the number of electrons in a small,...Ch. 23 - Two protons in an atomic nucleus are typically...Ch. 23 - A charged particle A exerts a force of 2.62 N to...Ch. 23 - In a thundercloud, there may be electric charges...Ch. 23 - (a) Find the magnitude of the electric force...Ch. 23 - Review. A molecule of DNA (deoxyribonucleic acid)...Ch. 23 - Nobel laureate Richard Feynman (19181088) once...Ch. 23 - A 7.50-nC point charge is located 1.80 m from a...Ch. 23 - (a) Two protons in a molecule are 3.80 10-10 m...Ch. 23 - Three point charges are arranged as shown in...Ch. 23 - Three point charges lie along a straight line as...Ch. 23 - Two small beads having positive charges q1 = 3q...Ch. 23 - Two small beads having charges q1 and q2 of the...Ch. 23 - Three charged panicles are located at the corners...Ch. 23 - Two small metallic spheres, each of mass m = 0.200...Ch. 23 - Review. In the Bohr theory of the hydrogen atom,...Ch. 23 - Particle A of charge 3.00 104 C is at the origin,...Ch. 23 - A point charge +2Q is at the origin and a point...Ch. 23 - Review. Two identical particles, each having...Ch. 23 - Two identical conducting small spheres are placed...Ch. 23 - Why is the following situation impossible? Two...Ch. 23 - What are the magnitude and direction of the...Ch. 23 - A small object of mass 3.80 g and charge 18.0 C is...Ch. 23 - Four charged particles are at the corners of a...Ch. 23 - Three point charges lie along a circle of radius r...Ch. 23 - Two equal positively charged particles are at...Ch. 23 - Consider n equal positively charged particles each...Ch. 23 - In Figure P23.29, determine the point (other than...Ch. 23 - Three charged particles are at the corners of an...Ch. 23 - Three point charges are located on a circular arc...Ch. 23 - Two charged particles are located on the x axis....Ch. 23 - A small, 2.00-g plastic ball is suspended by a...Ch. 23 - Two 2.00-C point charges are located on the x...Ch. 23 - Three point charges are arranged as shown in...Ch. 23 - Consider the electric dipole shown in Figure...Ch. 23 - A rod 14.0 cm long is uniformly charged and has a...Ch. 23 - A uniformly charged disk of radius 35.0 cm carries...Ch. 23 - A uniformly charged ring of radius 10.0 cm has a...Ch. 23 - The electric field along the axis of a uniformly...Ch. 23 - Example 23.3 derives the exact expression for the...Ch. 23 - A uniformly charged rod of length L and total...Ch. 23 - A continuous line of charge lies along the x axis,...Ch. 23 - A thin rod of length and uniform charge per unit...Ch. 23 - A uniformly charged insulating rod of length 14.0...Ch. 23 - (a) Consider a uniformly charged, thin-walled,...Ch. 23 - A negatively charged rod of finite length carries...Ch. 23 - A positively charged disk has a uniform charge per...Ch. 23 - Figure P23.49 shows the electric field lines for...Ch. 23 - Three equal positive charges q are at the corners...Ch. 23 - A proton accelerates from rest in a uniform...Ch. 23 - A proton is projected in the positive x direction...Ch. 23 - An electron and a proton are each placed at rest...Ch. 23 - Protons are projected with an initial speed vi =...Ch. 23 - The electrons in a particle beam each have a...Ch. 23 - Two horizontal metal plates, each 10.0 cm square,...Ch. 23 - A proton moves at 4.50 105 m/s in the horizontal...Ch. 23 - Three solid plastic cylinders all have radius 2.50...Ch. 23 - Consider an infinite number of identical...Ch. 23 - A particle with charge 3.00 nC is at the origin,...Ch. 23 - A small block of mass m and charge Q is placed on...Ch. 23 - A small sphere of charge q1 = 0.800 C hangs from...Ch. 23 - A line of charge starts at x = +x0 and extends to...Ch. 23 - A small sphere of mass m = 7.50 g and charge q1 =...Ch. 23 - A uniform electric field of magnitude 640 N/C...Ch. 23 - Two small silver spheres, each with a mass of 10.0...Ch. 23 - A charged cork ball of mass 1.00 g is suspended on...Ch. 23 - A charged cork ball of mass m is suspended on a...Ch. 23 - Three charged particles are aligned along the x...Ch. 23 - Two point charges qA = 12.0 C and qB = 45.0 C and...Ch. 23 - A line of positive charge is formed into a...Ch. 23 - Four identical charged particles (q = +10.0 C) are...Ch. 23 - Two small spheres hang in equilibrium at the...Ch. 23 - Why is the following situation impossible? An...Ch. 23 - Review. Two identical blocks resting on a...Ch. 23 - Review. Two identical blocks resting on a...Ch. 23 - Three identical point charges, each of mass m =...Ch. 23 - Show that the maximum magnitude Emax of the...Ch. 23 - Two hard rubber spheres, each of mass m = 15.0 g,...Ch. 23 - Two identical beads each have a mass m and charge...Ch. 23 - Two small spheres of mass m are suspended from...Ch. 23 - Review. A negatively charged particle q is placed...Ch. 23 - Review. A 1.00-g cork ball with charge 2.00 C is...Ch. 23 - Identical thin rods of length 2a carry equal...Ch. 23 - Eight charged panicles, each of magnitude q, are...Ch. 23 - Consider the charge distribution shown in Figure...Ch. 23 - Review. An electric dipole in a uniform horizontal...Ch. 23 - Inez is putting up decorations for her sisters...Ch. 23 - A line of charge with uniform density 35.0 nC/m...Ch. 23 - A particle of mass m and charge q moves at high...Ch. 23 - Two particles, each with charge 52.0 nC, are...
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