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

游客2025-02-23 21

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

Thoughtelephoneisindispensableinone’severydaylife,itbringsalotoftro

Aspyistryingtosendasecretmessage,we’retryingtodecodehismessage,a

[originaltext]IwillneverforgetthegreetingthatmyfamilyreceivedinI

Iflawandorderisnotpreserved,_________________________(无论是公民还是他的财产都不会安全).

黑格尔哲学的核心概念是（）。A.绝对同一 B.自我 C.绝对精神 D.自

核酸由三个部分组成，包括：A.碱基 B.核糖 C.磷酸基团 D.蛋白质

雷尼替丁抗消化性溃疡的机制是A.在胃液中形成胶体物，保护溃疡面B.阻断H2受体C

某投资项目的净现值大于零，基准收益率为15%，则该投资项目()。A、对贷款利率

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