課程名稱︰普通物理甲上
課程性質︰必修
課程教師︰蘇德潤
開課學院：工學院
開課系所：化工系
考試日期（年月日）︰
考試時限（分鐘）：110分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.the ballistic pendulum was used to measure the speeds of bullets before
electronic timing devices were developed.the version shown in Fig 1. consists
of a large block of wood of mass M=5,4kg,hanging from two long cords. a bullet
of mass m=9.5g is fired into the block,coming quickly to rest.the block+bullet
then swing upward, their ce nter of mass rising a vertical distance h=6.3cm
before the pendulum comes momentarily to rest at the end of its arc.what is
the speed of the bullet just prior to the collision?
附圖 http://ppt.cc/XJ~B
2.a uniform rope of mass m and length L hangs from a ceiling(a)show that the
speed of a transverse wave on the rope is a function of y,the distance from
the lower end,and is given by v^2=gy.(b)show that the time a transverse wave
takes to travel the length of the rope is given by t=2√(L/g)
3.(a)in Fig-2,two identical springs of spring constant 7580N/m are attached
to a block of mass 0.270 kg. what is the frequency of oscillation on the
frictionless floor?
(b)in Fig-2,two springs are attached to a block that can oscillate over a
frictionless floor.if the left spring is removed,the block oscillates at a
frequency of 30Hz.If instead, the spring on the right is removed,the block
oscillates at a frequency of 50Hz.at what frequency does the block oscillate
with both springs attached?
附圖 http://ppt.cc/yHUn
4.a 0.485kg sample of liquid water and a sample of ice are placed in a
thermally insulated container.the container also contains a device that
transfers energy as heat from the liquid water to the ice at a constant rate P
until thermal equilibrium is reached.the temperatures I of the liquid water
and the ice are given in Fig-3 as functions of time t,the horizontal scale is
set by ts=80.0min(a)what is rate P? (b)what is the initial mass of the ice in
the container? (c)when thermal equilibrium is reached,what is the mass of the
ice produced in this process?
附圖 http://ppt.cc/uT7L
--
I am Captain America~~~~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.240.59