Điện tích điểm Q gây ra điện trường tại A và B có cường độ lần lượt là Ea=22500 V/m và Eb=2500 V/m . Tính cường độ điện trường tqij trung điểm M của AB , biết Q-A-B thẳng hàng

Which device uses ac current to operate?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

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