Ali menginduksikan sebuah batang besi bermuatan +7,2 x 10-7 C dengan logam sampai batang besi tersebut menjadi netral. Oleh karena Ali lupa memakai sandal karet sebagai isolator, maka logam hasil induksinya kehilangan muatannya dengan kecepatan 10-6 C/s. Waktu kembalinya batang logam tersebut menjadi netral karena elektron tambahannya adalah A. 1,2 Menit

B. 5,5 Menit

C. 1 Menit

D. 2,4 Menit

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j