Conceptual Physical Science Plus Mastering Physics with Pearson eText -- Access Card Package (6th Edition)
6th Edition
ISBN: 9780134060484
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 69E
Hydrocarbons release a lot of energy when ignited. Where does this energy come from?
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4.) The diagram shows the electric field lines of a positively charged conducting sphere of
radius R and charge Q.
A
B
Points A and B are located on the same field line.
A proton is placed at A and released from rest. The magnitude of the work done by the electric field in
moving the proton from A to B is 1.7×10-16 J. Point A is at a distance of 5.0×10-2m from the centre of
the sphere. Point B is at a distance of 1.0×10-1 m from the centre of the sphere.
(a) Explain why the electric potential decreases from A to B. [2]
(b) Draw, on the axes, the variation of electric potential V with distance r from the centre of the
sphere.
R
[2]
(c(i)) Calculate the electric potential difference between points A and B. [1]
(c(ii)) Determine the charge Q of the sphere. [2]
(d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists
developed a common terminology to describe different types of fields. [1]
3.) The graph shows how current I varies with potential difference V across a component X.
904
80-
70-
60-
50-
I/MA
40-
30-
20-
10-
0+
0
0.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIV
Component X and a cell of negligible internal resistance are placed in a circuit.
A variable resistor R is connected in series with component X. The ammeter reads 20mA.
4.0V
4.0V
Component X and the cell are now placed in a potential divider circuit.
(a) Outline why component X is considered non-ohmic. [1]
(b(i)) Determine the resistance of the variable resistor. [3]
(b(ii)) Calculate the power dissipated in the circuit. [1]
(c(i)) State the range of current that the ammeter can measure as the slider S of the potential divider
is moved from Q to P. [1]
(c(ii)) Describe, by reference to your answer for (c)(i), the advantage of the potential divider
arrangement over the arrangement in (b).
1.) Two long parallel current-carrying wires P and Q are separated by 0.10 m. The current in wire P is 5.0 A.
The magnetic force on a length of 0.50 m of wire P due to the current in wire Q is 2.0 × 10-s N.
(a) State and explain the magnitude of the force on a length of 0.50 m of wire Q due to the current in P. [2]
(b) Calculate the current in wire Q. [2]
(c) Another current-carrying wire R is placed parallel to wires P and Q and halfway between them as shown.
wire P
wire R
wire Q
0.05 m
0.05 m
The net magnetic force on wire Q is now zero.
(c.i) State the direction of the current in R, relative to the current in P.[1]
(c.ii) Deduce the current in R. [2]
Chapter 19 Solutions
Conceptual Physical Science Plus Mastering Physics with Pearson eText -- Access Card Package (6th Edition)
Ch. 19 - How do two structural isomers differ from each...Ch. 19 - How are two structural isomers similar to each...Ch. 19 - What physical property of hydrocarbons is used in...Ch. 19 - What types of hydrocarbons are more abundant in...Ch. 19 - To how many atoms is a saturated carbon atom...Ch. 19 - What is the difference between a saturated...Ch. 19 - How many multiple bonds must a hydrocarbon have in...Ch. 19 - What kind of ring do aromatic compounds contain?Ch. 19 - What is a heteroatom?Ch. 19 - Why do heteroatoms make such a difference in the...
Ch. 19 - Why are low-formula-mass alcohols soluble in...Ch. 19 - What distinguishes an alcohol from a phenol?Ch. 19 - What distinguishes an alcohol from an ether?Ch. 19 - Which heteroatom is characteristic of an amine?Ch. 19 - Do amines tend to be acidic, neutral, or basic?Ch. 19 - Are alkaloids found in nature?Ch. 19 - What are some examples of alkaloids?Ch. 19 - Which elements make up the carbonyl group?Ch. 19 - How are ketones and aldehydes related to each...Ch. 19 - How are amides and carboxylic acids related to...Ch. 19 - From what naturally occurring compound is aspirin...Ch. 19 - What happens to the double bond of a monomer...Ch. 19 - What is released in the formation of a...Ch. 19 - Why is plastic wrap made of polyvinylidene...Ch. 19 - Prob. 25RCQCh. 19 - Rank the following molecules in order of the phase...Ch. 19 - Rank the following hydrocarbons in order of...Ch. 19 - Rank the following hydrocarbons in order of...Ch. 19 - Rank the following organic molecules in order of...Ch. 19 - Rank the following organic molecules in order of...Ch. 19 - What property of carbon allows for the formation...Ch. 19 - Why does the melting point of hydrocarbons...Ch. 19 - Draw all the structural isomers for hydrocarbons...Ch. 19 - How many structural isomers are shown here?Ch. 19 - According to Figure 19.3, which has the higher...Ch. 19 - The temperatures in a fractionating tower at an...Ch. 19 - Prob. 40ECh. 19 - Do heavier hydrocarbons tend to produce more or...Ch. 19 - What do these two structures have in common?Ch. 19 - What do the compounds cyclopropane and propene...Ch. 19 - What are the chemical formulas for the following...Ch. 19 - Prob. 45ECh. 19 - Prob. 46ECh. 19 - Identify the following functional groups in this...Ch. 19 - What must be added to a double bond to transform...Ch. 19 - What do phenols and carboxylic acids have in...Ch. 19 - What is the difference between a ketone and an...Ch. 19 - Prob. 51ECh. 19 - Prob. 52ECh. 19 - What is the percent volume of water in 80-proof...Ch. 19 - One of the skin-irritating components of poison...Ch. 19 - Cetyl alcohol, C16H34O, is a common ingredient of...Ch. 19 - A common inactive ingredient in products such as...Ch. 19 - A common inactive ingredient in products such as...Ch. 19 - The phosphoric acid salt of caffeine has the...Ch. 19 - Prob. 59ECh. 19 - In water, does the following molecule act as an...Ch. 19 - If you saw the label phenylephrine-HCl on a...Ch. 19 - The amino acid lysine is shown below. What...Ch. 19 - Prob. 63ECh. 19 - Suggest an explanation why aspirin has a sour...Ch. 19 - Benzaldehyde is a fragrant oil. If stored in an...Ch. 19 - What products are formed upon the reaction of...Ch. 19 - The disodium salt of ethylenediaminetetraacetic...Ch. 19 - Would you expect polypropylene to be more dense or...Ch. 19 - Hydrocarbons release a lot of energy when ignited....Ch. 19 - The polymer styrene-butadiene rubber (SBR), shown...Ch. 19 - Citral and camphor are both 10-carbon odoriferous...Ch. 19 - Many of the natural product molecules synthesized...Ch. 19 - The solvent diethyl ether can be mixed with water...Ch. 19 - Alkaloid salts are not very soluble in the organic...Ch. 19 - Why does the melting point of hydrocarbons...Ch. 19 - How many structural isomers are there for...Ch. 19 - Which contains more hydrogen atoms: a five-carbon...Ch. 19 - Prob. 4RATCh. 19 - Why might a high-formula-mass alcohol be insoluble...Ch. 19 - Alkaloid salts are not very soluble in the organic...Ch. 19 - Explain why caprylic acid, CH3(CH2)6 COOH,...Ch. 19 - How many oxygen atoms are bonded to the carbon of...Ch. 19 - One solution to the problem of our overflowing...Ch. 19 - Which would you expect to be more viscous: a...
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