Physics
7th Edition
ISBN: 9780321929013
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 14, Problem 16P
A 0.40-kg iron horseshoe, just forged and very hot (Fig. 14-16), is dropped into 1.25 L of water in a 0.30-kg iron pot initially at 20 0°C. If the final equilibrium temperature is 25.0°C, estimate the initial temperature of the hot horseshoe.
Figure 14-16
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*59 In Fig. 18-45a, two identical rec-
tangular rods of metal are welded end Ti
to end, with a temperature of T1 = 0°C
on the left side and a temperature
of T = 100°C on the right side. In
2.0 min, 10 J is conducted at a constant
rate from the right side to the left side.
How much time would be required to
conduct 10 J if the rods were welded
side to side as in Fig. 18-45b?
T2
(a)
т.
(6)
Figure 18-45 Problem 59.
***21 SSM ILW As a result of a
temperature rise of 32 C, a bar
Lo
with a crack at its center buckles
upward (Fig. 18-32). The fixed dis-
tance Lo is 3.77 m and the coeffi-
cient of linear expansion of the bar
is 25 x 10-6/C°. Find the rise x of
Lo
the center.
Figure 18-32 Problem 21.
47. (a) Estimate the total power radiated into space by the
Sun, assuming it to be a perfect emitter at T = 5500 K.
The Sun's radius is 7.0 × 10³ m. (b) From this, determine
the power per unit area arriving at the Earth, 1.5 × 101 m
away (Fig. 14–20).
r = 1.5 x 1011 m
FIGURE 14-20
Sun
Earth
Problem 47.
Chapter 14 Solutions
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