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

游客2025-02-27 8

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

Listeningtoothersisanimportantpartofcommunication.Manymoreerrors

Canyoufindsome______explanationforhisillnesssinceheseemstohavenoo

"TheGooglebrandhastakenonalifeofitsown,"concedesJimLanzone,the

组织多普勒超声显像不能够应用于检测A.心脏收缩和舒张功能 B.心室壁节段性运动

腹部手术中胃肠道切开前，用纱布垫进行保护的目的是A.防止胃肠内容物污染腹腔 B

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