A brass rod 12.0 cm long, a copper rod 18.0 cm long, and an aluminum rod 24.0 cm long—each with cross-sectional area 2.30 cm 3 —are welded together end to end to form a rod 54.0 cm long, with copper as the middle section. The free end of the brass section is maintained at 100.0°C, and the free end of the aluminum section is maintained at 0.0°C. Assume that there is no heat loss from the curved surfaces and that the steady-state heat current has been established. What is (a) the temperature T 1 at the junction of the brass and copper sections; (b) the temperature T 2 at the junction of the copper and aluminum sections; (c) the heat current in the aluminum section?
A brass rod 12.0 cm long, a copper rod 18.0 cm long, and an aluminum rod 24.0 cm long—each with cross-sectional area 2.30 cm 3 —are welded together end to end to form a rod 54.0 cm long, with copper as the middle section. The free end of the brass section is maintained at 100.0°C, and the free end of the aluminum section is maintained at 0.0°C. Assume that there is no heat loss from the curved surfaces and that the steady-state heat current has been established. What is (a) the temperature T 1 at the junction of the brass and copper sections; (b) the temperature T 2 at the junction of the copper and aluminum sections; (c) the heat current in the aluminum section?
A brass rod 12.0 cm long, a copper rod 18.0 cm long, and an aluminum rod 24.0 cm long—each with cross-sectional area 2.30 cm3—are welded together end to end to form a rod 54.0 cm long, with copper as the middle section. The free end of the brass section is maintained at 100.0°C, and the free end of the aluminum section is maintained at 0.0°C. Assume that there is no heat loss from the curved surfaces and that the steady-state heat current has been established. What is (a) the temperature T1 at the junction of the brass and copper sections; (b) the temperature T2 at the junction of the copper and aluminum sections; (c) the heat current in the aluminum section?
1.62 On a training flight, a Figure P1.62
student pilot flies from Lincoln,
Nebraska, to Clarinda, Iowa, next
to St. Joseph, Missouri, and then to
Manhattan, Kansas (Fig. P1.62). The
directions are shown relative to north:
0° is north, 90° is east, 180° is south,
and 270° is west. Use the method of
components to find (a) the distance
she has to fly from Manhattan to get
back to Lincoln, and (b) the direction
(relative to north) she must fly to get
there. Illustrate your solutions with a
vector diagram.
IOWA
147 km
Lincoln 85°
Clarinda
106 km
167°
St. Joseph
NEBRASKA
Manhattan
166 km
235°
S KANSAS MISSOURI
Plz no chatgpt pls will upvote
3.19 • Win the Prize. In a carnival booth, you can win a stuffed gi-
raffe if you toss a quarter into a small dish. The dish is on a shelf above
the point where the quarter leaves your hand and is a horizontal dis-
tance of 2.1 m from this point (Fig. E3.19). If you toss the coin with
a velocity of 6.4 m/s at an angle of 60° above the horizontal, the coin
will land in the dish. Ignore air resistance. (a) What is the height of the
shelf above the point where the quarter leaves your hand? (b) What is
the vertical component of the velocity of the quarter just before it lands
in the dish?
Figure E3.19
6.4 m/s
2.1
Chapter 17 Solutions
University Physics with Modern Physics, Volume 2 (Chs. 21-37); Mastering Physics with Pearson eText -- ValuePack Access Card (14th Edition)
Applications and Investigations in Earth Science (9th Edition)
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