College Physics for AP® Courses 2e

# Chapter 34

### Problems & Exercises

1.

$3 × 10 41 kg 3 × 10 41 kg$

3.

(a) $3×1052kg3×1052kg$

(b) $2×10792×1079$

(c) $4×10884×1088$

5.

0.30 Gly

7.

(a) $2.0×105km/s2.0×105km/s$

(b) $0.67c0.67c$

9.

$2 . 7 × 10 5 m/s 2 . 7 × 10 5 m/s$

11.

$6×10−116×10−11$ (an overestimate, since some of the light from Andromeda is blocked by gas and dust within that galaxy)

13.

(a) $2×10−8kg2×10−8kg$

(b) $1×10191×1019$

15.

(a) $30km/s⋅Mly30km/s⋅Mly$

(b) $15km/s⋅Mly15km/s⋅Mly$

17.

960 rev/s

19.

$89.999773º89.999773º$ (many digits are used to show the difference between $90º90º$)

22.

23.6 km

24.

(a) $2.95×1012m2.95×1012m$

(b) $3.12×10−4ly3.12×10−4ly$

26.

(a) $1 × 10 20 1 × 10 20$

(b) 10 times greater

27.
$1 . 5 × 10 15 1 . 5 × 10 15$
29.
$0 . 6 m − 3 0 . 6 m − 3$
31.
$0.30 Ω 0.30 Ω$
32.

(a)

(b)

(c) The galaxies are separating mostly due to the expansion of space.

(d) Light from the third galaxy would have a red shift when detected in either of the other galaxies.

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