A circular wheel travels along a flat surface at a constant rate of 2.5 feet per

游客2025-02-23 24

问题 A circular wheel travels along a flat surface at a constant rate of 2.5 feet per second. How many complete revolutions will the wheel make in 50 seconds if its diameter is 3 feet?

选项 A、6
B、10
C、13
D、14
E、19

答案 C

解析 50秒内轮子走过的距离：轮子的周长(πd)×圈数。50×2.5=π×3×revolutions=13＜revolution＜14。

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A circular wheel travels along a flat surface at a constant rate of 2.5 feet per

Howmuchlongeristheedgeofacubewithasurfaceareaof1,350thantheedge

DISPARATE:A、helpfulB、increasingC、constantD、homogeneousE、convincingD

Thedriverwasexcessively______,constantlyapologizingforthecar’spoorsusp

Astheyearswentby,Kingsley’slettersdisplayedhimdecliningintoaconstant

SEPTIC:A、constantB、consistentlyarrangedC、devoidofinfectionD、ofunidentifie

DISPARATE:A、helpfulB、increasingC、constantD、homogeneousE、convincingD

Scientistsbelievethatbyraisingatmosphericpressureandsurfacetemperature,

Whenhomeisapproximately2,000feetunderthesurfaceofthesea,itischalle

Infrigidregionsalayerofpermafrostunderthesoilsurfacepreventswaterfr

Ryan’s______botheredhisfriends,whotiredofinstabilityandconstantchanges

•Lookatthenotesbelow.•Youwillhearamantelephoningasportscentre.•

Notasinglemistake_____inthetest.A、hemadeB、didhemakeC、hehasmadeD、mad

Shebrokeoffwithalittleshudder.ItwasarelieftoFramtonNuttelwhen

TheTelecommunicationsRevolutionA)Atransformationisoccu

A.0 B.1 C.2 D.3

3幕4场话剧《天下第一楼》是（）创作的。A.李龙云 B.何冀平 C.许瑞生

某饱和土样的天然含水率ω＝20%，土粒比重Gs＝2.75，该土样的孔隙比为（

2008年末比上年增长了： A2.53% B1.97% C1.

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