課程名稱︰普通物理乙
課程性質︰必修
課程教師︰王建萬
開課學院：
開課系所︰農化系
考試日期（年月日）︰100/1/12
考試時限（分鐘）：13:20~15:10
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.what are (a)the speed and (b)the period of a 300kg satellite in an
approximately circular orbit 720 km above the surface of earth? Suppose
the satellite loses mechanical energy at the average rate of 1.4*10^5 J
per orbital revolution.Adapting the reasonable approximation that the
satellite's orbit becomes a "circle of slowly diminishing radius", determ-
ine the satellite's (c)altitude (d)speed, and (e)period at the end of its
2000th revolution.(f)what is the magnitude of the average retarding force
on the satellite?Is angular momentum around earth's center conserved for
(g)the satellite (h)satellite-earth system(assuming that syst. is isoated)
(16%)
2.Fig 1. shows a stream of water flowing through a hole at depth h=16cm in
a tank holding water to height H=80cm.(a)at what depth should a 2nd hole
be made to give the same value of x?(c)at what depth should a hole be
made to maximize the x?(d)what is the max. x?
(10%)
3.A simple harmonic oscillator consists of a block attached to a spring
with k=250N/m. The block slides on a frictionless surface, with equili-
brium point x=0 and amplitude 0.30m.A graph of the block’s velocity as
a function of time t is shown in Fig 2. The horizontal scale is set by
ts=0.4s.What are(a)the period of the SHM,(b)the block’s mass,(c)it's
displacement at t=0,(d)its acceleration at t=0.1s,and(e)its max. kine-
tic energy? (10%)
4.A sinusoidal transverse wave is traveling along a string in the negative
direction of an x axis.Fig.3 shows a plot of the displacement as a function
of position at time t=0; the scale of the y axis is set by ys=6.00cm. The
string tension is 4.8 Nt, and its Linear density is 36.0g/m.
Find the(a)amplitude,(b)wavelength, (c)wave speed, and (d)period of the
wave.(e) Find the max. transverse speed of a particle in the string .
If the wave is of the form y(x,t)=ymsin(kx+-wt+ф), what are (f)k,(g)w,
(h) ф,and (i)the correct choice of the sign in front of w? (18%)
5. A girl is sitting near the open window of a train that is moving at a
velocity 30.m/s to the east. The girl's uncle stands near the tracks
watches the train the train move away. The locomotive whistle emits sound at
frequency 600Hz. The air is still. (a) What frequency does the girl hear?
(b) What frequency does the uncle hear? A wind begins to blow from the east
at 20.00m/s. (c) What frequency does the girl now hear? (d) What frequency
does the uncle now hear? If, in addition to the winf blows, the uncle
begins to move at a velocity v=10.00m/s to the west.(e) What frequency does
the girl now hear?(f) What frequency does the uncle now hear? (12%)
6. When a system is taken from state i to state f along path iaf in Fin. 4,
Q=60 cal and W=24 cal. Along path ibf, Q=43 cal.(a)What is W along path ibf?
(b) If W= -16 cal for the return path fi, what is Q for this path? (c) If
Ｅint,i=12 cal, what is Ｅint,f? If Ｅint,b=26 cal,what is Q for (d) path ib
and (e) path bf ? (10%)
7. Figure 3 shows a cycle undergoes by 2.00mol of an ideal monatomic gas.The
temperature are T1=300K, T2=600K and T3=455K. For 2→3, what are (a) heat Q,
(b) the change in internal energy ΔEint, and (c) the work done W? For 3→1,
what are (d) Q, (e) ΔEint, and (f) W? For 1→2, what are (g) Q, (h) ΔEint,
and (i) W? For the full cycle, what are (j) Q, (k) ΔEint, and (l) W? The
initial pressure at point 1 is 2.00atm (=2.026×10^5 Pa). What are the (m)
volume and (n) pressure at point 2 and the (o) volume and (p) pressure at
point 3? (the gas constant R=8.31J/mol.K) (24%)
與課本對照(Halliday 9th) 有改數字 但其他都差不多 有幾題有加題目
1→chp.13 #67
2 14-71
4 16-23
5 17-67
6 18-47
7 19-63
第三題我找不到囧 SORRY
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