សិស្សម្នាក់លើកសៀវភៅ 1 ក្បាល ពីក្តារក្រាលដាក់លើធ្វើទូរសៀវភៅមួយ កម្ពស់ 2 m ដោយបញ្ចេញកម្មន្ត 10 ] ។ ដោយសន្មតថាសំទុះទំនាញដីគឺ
10 m/s ម៉ាសរបស់សៀវភៅនោះគឺ៖

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?