{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Homework Combined

# Homework Combined - Kapoor(mk9499 homework 01 Turner(60230...

This preview shows pages 1–3. Sign up to view the full content.

Kapoor (mk9499) – homework 01 – Turner – (60230) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire? 1. To transfer electrons to the automobile 2. To discharge the automobile correct 3. To transfer positive particles to the auto- mobile 4. To warn the drivers 5. To count the vehicles Explanation: Metal wire can conduct net charges to the ground so that it can make the automobile uncharged. 002 10.0 points The five thousand billion freely moving elec- trons in a penny repel one another. Why don’t they fly off the penny? 1. The electrons attract each other. 2. They cause a jam when they try to fly away. 3. They don’t have enough speed. 4. They are attracted to the five thou- sand billion positively charged protons in the atomic nuclei of atoms in the penny. correct 5. The shell of the penny prevents the elec- trons from flying. Explanation: The electrons are bound to the nuclei. 003 10.0 points How can a charged atom (an ion) attract a neutral atom? 1. The charged atom can emit x rays to induce ionization of the neutral atom. 2. An ion polarizes a nearby neutral atom, so that the part of the atom nearer to the ion acquires a charge opposite to the charge of the ion, and the part of the atom farther from the ion acquires a charge of the same sign as the ion. correct 3. The charged atom can hit the neutral atom and make it positively charged or nega- tively charged. 4. The charged atom can produce secondary electrons to interact with the neutral atom and make it positively charged or negatively charged. Explanation: An ion polarizes a nearby neutral atom, so that the part of the atom nearer to the ion acquires a charge opposite to the charge of the ion, and the part of the atom farther from the ion acquires a charge of the same sign as the ion. 004 10.0 points A particle of mass 62 g and charge 63 μ C is released from rest when it is 53 cm from a second particle of charge 17 μ C. Determine the magnitude of the initial ac- celeration of the 62 g particle. Correct answer: 552 . 694 m / s 2 . Explanation: Let : m = 62 g , q = 63 μ C = 6 . 3 × 10 5 C , d = 53 cm = 0 . 53 m , Q = 17 μ C = 1 . 7 × 10 5 C , and k e = 8 . 9875 × 10 9 . The force exerted on the particle is F = k e | q 1 | | q 2 | r 2 = m a

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Kapoor (mk9499) – homework 01 – Turner – (60230) 2 bardbl vectora bardbl = k e bardbl vectorq bardbl bardbl vector Q bardbl m d 2 = k e vextendsingle vextendsingle 6 . 3 × 10 5 C vextendsingle vextendsingle vextendsingle vextendsingle 1 . 7 × 10 5 C vextendsingle vextendsingle (0 . 062 kg) (0 . 53 m 2 ) = 552 . 694 m / s 2 .
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 39

Homework Combined - Kapoor(mk9499 homework 01 Turner(60230...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online