physics sample problems
TRANSCRIPT
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7/25/2019 Physics Sample Problems
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Question 1
On a linear X temperature scale, water freezes
at -136.0X and boils at 433.0X. On a linearY temperature scale, water freezes at -.00Y
and boils at -!!.00Y. " temperature of
4#.00Y corresponds to w$at temperature on
t$e X scale%
Question 2
"t 16&, a brass cube $as an ed'e len't$ of 30
cm. ($at is t$e increase in t$e cube)s surface
area w$en it is $eated from 16& to 6*&% +$e
linear epansion coefficient of brass is 1*
10-6&.
Question 3
"n aluminum-allo/ rod $as a len't$ of 13.#*!
cm at 1.00& and a len't$ of 13.03 cm at
t$e boilin' point of water. (a)($at is t$e
len't$ of t$e rod at t$e freezin' point of
water% (b)($at is t$e temperature if t$e
len't$ of t$e rod is 13.!6 cm%
Question 4
($en t$e temperature of a metal c/linder israised from 0.0& to 4#.&, its len't$
increases b/ 0.11. (a)2ind t$e percent
c$an'e in densit/. (b)($at is t$e metal% se
+able below.
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Question 5
"n aluminum cup of 130 cm3capacit/ is
completel/ filled wit$ 'l/cerin at 1#&. ow
muc$ 'l/cerin will spill out of t$e cup if t$e
temperature of bot$ t$e cup and 'l/cerin is
increased to 44&% 5+$e linear epansion
coefficient of aluminum is !3 10-61&. +$e
coefficient of olume epansion of 'l/cerin is
.1 10-41&.7
Question 6
" small electric immersion $eater is used to
$eat #! ' of water for a cup of instant coffee.
+$e $eater is labeled 81#0 watts9 5it conerts
electrical ener'/ to t$ermal ener'/ at t$is
rate7. &alculate t$e time re:uired to brin' all
t$is water from !0& to 100&, i'norin' an/
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7/25/2019 Physics Sample Problems
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$eat losses. 5+$e specific $eat of water is 416
;. +$e latent $eat of fusionis 333
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7/25/2019 Physics Sample Problems
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Question 10
+$e specific $eat of a substance aries wit$
temperature accordin' to cA 0.61 B 0.#1TB
0.01T!, wit$ Tin & and cin cal'=>. 2ind
t$e ener'/ re:uired to raise t$e temperature of
.0 ' of t$is substance from 3.0& to 1#&.
Question 11
&onsider a slab of face area Aand t$ic,k3A 0.043!
(m=> and k4A 0.104 (m=> 5k!is
un
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7/25/2019 Physics Sample Problems
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($at is interface temperature T34%