答案如圖

9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley

答案如圖

9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley

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A disk of radius 4 cm has a uniform charge density 5 uC/m². What is the field strength at a point along its central axis at a distance 10 cm from the center? a

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7. (10 points) SARS incidence The table shows the number of people per day who died from SARS in Singapore at two-week intervals beginning on March 1, 2003. Estimate the number of people who died of SARS in Singapore between March 1 and May 24, 2003, using both left endpoints and right endpoints. Date Date March 1 March 15 March 29 April 12 Deaths per day 0.0079 0.0638 0.1944 0.4435 April 26 May 10 May 24 Deaths per day 0.5620 0.4630 0.2897

請問53和55這種要怎麼寫呢QQ

Section 1.2 Inequalities and Absolute Values”15 $1. |x一2| < 二|6x ~ 12| < eg 52, Exr+4和1<5[2x+81<e 記 Pro5/e/y 53一56, 包27 6 (depez7d7g 9 e) 59 fd/ 和ce gue7 7722/cdf97 說 諺e [外< 3二|3r 一15|<e 5$4. |Ix 一2|1 ~二|4x 一81<e [急]lrxr + < 8二|6x 十36| <e 56. |十5 < 5人久|5r + 25| <e 57. On a lathe, you are to turn out a disk (thin right circular cylinder) of circumference 10 inches.This is done by continually measuring the diameter as you make the disk smaller. How closely must you measure the diameter if you can tolerate an error of at most 0.02 inch in the circumference? 5$8。Fahrenheit temperatures and Celsius temperatures are Telated by the formula C == (所 一 32). An experiment requires