Flashcard Answers

5-1: p kg•m/s vector quantity that factors in the mass and velocity of an object
5-2: 83 kg•m/s
5-3: 1.5 m/s
5-4: J N•s change in momentum of an object due to a force applied over time
5-5: 45 N•s
5-6: 6.4 m/s
5-7: equal in magnitude but opposite in direction
5-8: 1.2 m/s
5-9: ?
5-10: they'll both stop because their momenta were equal
6-1: 6.67 x 10^-11 N• m²/kg
6-2: the greater the mass, the greater the force
6-3: changes with the square of distance
6-4: still X
6-5: 3.7 x 10^-10N
7-1: W Joule energy required for movement
7-2: P Watt rate at which work is done
7-3: 1 N force moving an object 1 m; 1 Joule of work done in 1 second
7-4: more
7-5: 420 J
7-6: 320 J
7-7: 68 W
7-8: no work is done
8-1: potential energy: energy of position; kinetic energy: energy of motion
types of potential energy: gravitational, chemical, electric, spring; J
8-2: 3740 J
8-3: 250 J
8-4: equals; At the top of its swing, a pendulum's energy is all potential energy and as it swings, the potential energy converts to kinetic energy at it speeds up, bottom of swing is all kinetic energy
8-5: mechanical; internal, Q
8-6: not applicable
8-7: 930 J; gain 930 J
8-8: 11 m/s
8-9: Energy stored in a stretched spring or other elastic material; k describes how easily a spring is stretched.
8-10: 2 N/m
8-11: 4.7 N/m
8-12: 0.13 J
9-1: 23 m/s
9-2: 8.8 m/s
9-3: 0.90 s
9-4: 1.80 s; 41 m
9-5: 4.0 m
9-6: Both will land at the same time.
9-7: 4.9 s
9-8: 104 m
9-9: 38 m
9-10: Force that keeps objects moving in curved paths.
9-11: F_c. Object moves tangent to the circle.
9-12: towards the centre; inertia
9-13: 0.34 m/s²
9-14: 360 N
10-1: ion; equal to
10-2: positively; negatively; elementary
10-3: 1.6 x 10^-19C; 6.25 x 10¹⁸
10-4: friction; repel; attract; attract
10-5: The leaves will repel because they are both charged -vely due to the electrons being repelled by the rod and migrating down the electroscope.
10-6: induction
10-7: ground; earth; electrons will move from the object to the ground
10-8: total charge of a system stays the same; -2 C
10-9: 2.1 x 10^-3
10-10: 1/9 of what it was
10-11: 7.3 x 10⁶ N
10-12: positive
10-13: Move away from the positive and towards the negative
10-14: 5.0 x 10^-3 N/C
10-15: potential difference
10-16: volt; V; electron volt; eV
11-1: ampere; circle with an A in it; ammeter, series
11-2: 20 A
11-3: potential difference, voltage, voltmeter, parallel
11-4: refer to your notes
11-5: conductors; insulators
11-6: resistance; ohms; Ω
11-7: 10 A
11-8: decreases; increases; decreases, resistivity
11-9: 0.016 Ω
11-10: see your notes
11-11: 120 Ω
11-12: 0.10 A
11-13: 5 V
11-14: see your notes
11-15: 29 Ω
11-16: 0.41 A
11-17: 0.24 A
11-18: less
11-19: watt; W; volts; amperes
11-20: 1200 W
11-21: power; time; joule
11-22: 12 000 J
11-23: 5 A
11-24: less
12-1: magnetic; north; south; charged object; motion
12-2: repel; attract; south
12-3: field intensity; flux
12-4: north to south
12-5: lines go from north to south
12-6: lines go out from each north and repel each other
12-7: lines go into each south but repel each other
12-8: lines go from north to south
12-9: potential difference; current
12-10: greater
15-7: 6.9 x 10¹⁴ Hz; violet
15-8: spectra; bright line spectra
15-9: nucleons
15-10: 2.1 x 10¹⁷ J
15-11: strong nuclear, electromagnetic, weak nuclear, gravitational force
15-12: na
15-13: na
15-14: na
PRT-1: Coulomb's constant; 9 x 10⁹ Nm²/C²
PRT-2: na
PRT-3: 1.67 x 10^-27 kg; 1.67 x 10^-18 mg
PRT-4: ma
PRT-5: 9.8 m/s²
PRT-6: 0.53; copper; steel
PRT-7: na
PRT-8: UV
PRT-9: na
PRT-10: current; voltage
PRT-11: electric field strength
PRT-12: silver
PRT-13: see your notes
PRT-14: period
PRT-15: energy; drops
PRT-16: ev; 1.6 x 10^-19 J; Planck's constant
PRT-17: divide by two, then square it and multiply by pi
PRT-18: multiplying the sine of the angle by the initial velocity
PRT-19: v_f² = v_i² + 2ad
PRT-20: equals
PRT-21: impulse; time
PRT-22: internal energy