An engineer designed a ball so that when it was dropped, it rose with each bounc

游客2025-02-27 32

问题 An engineer designed a ball so that when it was dropped, it rose with each bounce exactly one-half as high as it had fallen. The engineer dropped the ball from a 16-meter platform and caught it after it had traveled 46.5 meters. How many times did the ball bounce?

选项 A、5
B、6
C、7
D、8
E、9

答案 A

解析 You can approach this problem by just adding up the bounces. It falls 16m, then bounces 8m and drops 8m (now it has traveled 32m), bounces 4m and falls 4m (40m), bounces 2m and falls 2m (44m), bounces 1m and falls 1m (46m), bounces 0.5m and is caught by the engineer. That was 5 bounces.

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An engineer designed a ball so that when it was dropped, it rose with each bounc

Anengineerdesignedaballsothatwhenitwasdropped,itrosewitheachbounc

Electricalengineershaverepeatedlydemonstratedthatthebestsolid-stateampl

Thenumberofundergraduatedegreesinengineeringawardedbycollegesandunive

InaplantostoptheerosionofEastCoastbeaches,theArmyCropsofEngineeri

ThecomputersoftwarebeingdesignedforaprojectstudyingNativeAmericanacce

Manyofficebuildingsdesignedtopreventoutsideairfromenteringhavebeensh

[img]ct_gre5image066[/img]TriangulargardenABCisredesignedbyincreasingthe

Acertainspiralstaircaseisdesignedsothateachstepafterthefirstoneis

Mediareportsallegedthatthecandidate’scampaignstrategywasdesignedto____

Theengineersheardtheclaimsaboutthenewsoftwarewith(i)______,butthede

Wemaylookattheworldaroundus,butsomehowwemanagenottoseeitunti

Nothingwastopreventhimnowfrombecomingtherichest,and______thehappiest

Forthispart,youareallowed30minutestowriteashortessay.Youshouldsta

如何确定责任保险中的赔偿限额。

患者男性，10岁。逐渐出现右侧肢体活动障碍，行走不稳，向右侧偏斜，饮水呛咳，并出

患者女性，26岁。产后第3周出现恶寒发热，右乳肿胀疼痛，体温38.7℃，检查见右

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