# Fisica

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Chapter 1 Even Answers

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623 kg/m3
3
3
4 πρ (r2 – r1 )
3
7.69 cm
8.72 × 1011 atoms/s
(a) 72.6 kg(b) 7.82 × 1026 atoms
equation is dimensionally consistent
The units of G are: m3/kg ⋅ s2
9.19 nm/s
(a) 3.39 × 105 ft3 (b) 2.54 × 104 lb8.32 × 10–4 m/s
9.82 cm
(a) 6.31 × 104 AU (b) 1.33 × 1011 AU
(a) 1.609 km/h (b) 88.5 km/h (c) 16.1 km/h
(a) 3.16 × 107 s/yr (b) 6.05× 1010 yr
2.57 × 106 m3
1.32 × 1021 kg
(a) 2.07 mm (b) 8.62 × 1013 times as large
(a) 13.4 (b) 49.1
3

rAl = rFe (ρFe/ρAl)
~ 106km
~ 109 drops
time required ≅ 50 years or more;
advise against accepting the offer
~ 105 tons
(a) 2 (b) 4 (c) 3 (d) 2
(a) 797 (b)1.1 (c) 17.66
(a) 3 (b) 4 (c) 3 (d) 2
5.2 m3, 2.7%
1.79 × 10–9 m
24.6°
(b) Acylinder = πR2, Arectangular solid = lw
0.141 nm
289 µm(a) 1000 kg (b) 5.2 × 10–16 kg 0.27 kg (d) 1.3 × 10–5 kg
g
Aluminum: 2.75 3 (table value is 2% smaller)
cm
g
Copper: 9.36
(tablevalue is 5% smaller)
cm3
g
Brass: 8.91
cm3
g
Tin: 7.68
cm3
g
Iron: 7.88
(table value is 0.3% smaller)
cm3