Một hình trụ tròn có đường kính đáy 4cm cao 18cm nhưng chìm trong chậu nước theo chiểu phương thẳng đứng sao cho đáy dưới cách mặt nước 28cm. Tính lực tác dụng vào các mặt đáy của hình này biết pi= 3,14 và trọng lương riêng của nước là 10000N/m^3

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

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