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新加坡留学 O水准历年考试真题

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O水准考试

新加坡留学

发布时间:2012年10月19日    浏览次数:     作者:lulu
新加坡留学网专家老师给大家分享历年的O水准考试科目,以供大家可以参考。
1.WhiCh ofthe foⅡ owing statements aboutthe1η otion of an objectis incorrect?
A The average speed of an objectis equalto the total distance travelled divided by
tirne taken。
B Ve|ocity is a VeCtor quantity.
C The acce丨eration and veloc⒒ y of an object are not necessarily in the same direction.
D The speed of an objectis dependent on its direction of motion。

2.Afterthe driver appⅡ es the brake,a car of rnass850kg takes a distance of4o rη to stop。If the
initial speed ofthe caris151η /s,find the braking force.
A 150N
B 319N
C 1500N
D 2391N

3.A ba"of weight W is re丨eased from the top ofthe Eiffe丨TOwer.After some tirη e,why does the
ba"reach terrη inal ve丨ocity?
A M/becomes zero.
B W is equalto the air resistance acting on the ball.
C W is equa丨to the acce丨eration due to gravity.
D W is equalto the1η ass ofthe ball

4.MiChaelruns to the top of a Science Block in1minute。There are50steps,each0.21η in
height。Whatis h/liChaers powerif his weightis750N?
A 2.5W
B 125W
C 625W
D 1250W

5.Brownian rη otion is often demonstrated by vieWing through a low power microscope
i"urninated smoke partic丨es,contained in a sealed transparent ce".Which ofthe fo"owing
statements is not correct?
A Sma"specks of Ⅱght are seen rη oving aboutin a random motion。
B Air molecules are too tiny to be observed through the rη icroscope。
C The observed rηotion is caused by random motion ofthe smoke partic丨es.
D The speed ofthe observed rηotion would decrease ifthe temperature drops。

6.1n caⅡ brating a theΠ ηocoup|e therrnometer,one of⒒ s junctions is keptin rη e丨ting ice and the
otherin bo"ing、Ⅳater。The current reading on the1η icroˉ arn1η eter is200uA,and the po丨nter
points to the right。lf the‘ hotjunction’ is ir11rη ersed in hot water and the current reading is
120uA,whatis the temperature ofthe hot water?
A 40° C
B 60°C
C 80° C
D 120°C

7.A radio station broadcasts at938001Ⅵ Hz。Whatis the、Ⅳave|ength ofthe radio、″ave in the
air?(Assume thatthe speed of"ght is3× 1o:m/s。)
A 3.20× 10ˉ3m
B 313m
C 320m
D 2.8× 1019m

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