課程名稱︰普通物理(甲)上
課程性質︰大一共同必修
課程教師︰黃暉理
開課學院：生農學院
開課系所︰生物產業機電工程學系
考試日期（年月日）︰2008/12/3
考試時限（分鐘）：50 minutes
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.Observations of the light from a certain star indicate that it is part of a
two-star system.This visible star has orbital speed v=300km/s,orbital period
T=1.50 days and approximate mass m1=5Ms (Ms is sun's mass=1.99×10^30kg).
Assume that the visible star and its companion star,which is dark and unseen,
are both in circular orbits.What multiple of Ms gives the approximate mass
m2 of the dark star?
2.Water flows through a horizontal pipe and then out into the amtosphere at a
speed v1=20m/s.The diameters of the left and right sections of the pipe are
10.0cm and 5.0cm.
(a)What volume of water flows into the atmosphere during a 5 minutes period?
(b)What is the speed v2 in the left section of the pipe?
(c)What is the gauge pressure in the left section of the pipe?
3.A wheel is free to rotate about its fixed axle.A spring is attached to one
of its spokes a distance r from the axle.
(a)Assuming that the wheel is a hoop of mass m and radius R,what is the
angular frequency ω of small oscillations of this system in terms of
m,R,r,and the spring k?
(b)if r=0.5R,ω=?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.7.59
※ 編輯: NBASCIDM 來自: 140.112.7.59 (12/04 14:43)