Physics, 19.06.2021 05:50 kitttimothy55
hai nguồn sóng kết hợp trên mặt nước cách nhau một đoạn là AB bằng 9 bước sóng phát ra dao động cùng pha nhau. Trên đoạn AB số điểm có biên độ cực đại cùng pha với nhau và cùng pha với nguồn không kể 2 nguồn là bao nhiêu??
Answers: 1
Physics, 22.06.2019 11:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 1
Physics, 22.06.2019 16:40
The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
Answers: 3
Physics, 23.06.2019 03:00
Suppose that a cylindrical tank 6 meters high with a radius of 2 meters is filled to the rim with water. the tank is buried so that the top of the tank is 1 meter below ground level. the space above the tank is not filled with water. calculate how much work needs to be done by a pump to pump the water out of the tank up to ground level. (the water weighs 9,800 newtons per cubic meter.)
Answers: 2
Physics, 23.06.2019 03:20
The motion of water in a dam serves human beings by generating electricity as it is a controlled motion. give one example for an uncontrolled motion. what effects could it cause
Answers: 1
hai nguồn sóng kết hợp trên mặt nước cách nhau một đoạn là AB bằng 9 bước sóng phát ra dao động cùng...
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