Physics, 12.10.2021 03:50 herchellann302
Một tài xế mô-tô đi về phía nam với tốc độ 20 m/s mất 3 phút, sau đó vòng qua phía tây
với tốc độ 25 m/s mất 2 phút và cuối cùng anh ta đi theo hướng tây bắc với tốc độ 30 m/s
trong 1 phút. Trong 6 phút di chuyển trên, hãy tìm vector độ dời tổng hợp, tốc độ trung
bình và vận tốc trung bình của xe. Chọn chiều dương trục x là hướng đông.
Answers: 3
Physics, 22.06.2019 04:20
Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.
Answers: 3
Physics, 22.06.2019 08:50
You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?
Answers: 1
Physics, 22.06.2019 10:00
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 11:30
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
Answers: 1
Một tài xế mô-tô đi về phía nam với tốc độ 20 m/s mất 3 phút, sau đó vòng qua phía tây
với tốc độ...
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