Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. what is the average power expended by the student to overcome gravity?

560 watts.
   Power is measured in watts which is joules per second. 1 joule is required to lift one newton one metre. Total energy used is therefore 700 x 8 = 5,600 joules. Total power is the number of joules used divided by the time in seconds 5,600/10 = 560w

The description helps readers understand how Alfonso's concern about his appearance is affecting him. The description of his thumbs after pushing on his teeth as "tired and wrinkled and pink" shows how far Alfonso will go to improve his image. The comparison of his bike to "a handful of dimes" shows how careful he is. These descriptions contribute to the theme that the way you look does not always reflect who you want to be.