Physics, 13.06.2020 02:57 breannagrd4075
A model airplane is flying horizontally due southsouth at 4444 mi/hr when it encounters a horizontal crosswind blowing westwest at 4444 mi/hr and a downdraft blowing vertically downward at 2222 mi/hr. a. Find the position vector that represents the velocity of the plane relative to the ground. b. Find the speed of the plane relative to the ground. a. Let the unit vectors i, j, and k point east, north, and upward, respectively. Begin by writing vectors describing the velocity of the plane relative to the air, the crosswind, and the downdraft. Find the vectors representing the velocity of the plane relative to the air v Subscript ava, the velocity of the horizontal crosswind v Subscript wvw, and the velocity of the vertical downdraft v Subscript dvd. v Subscript avaequals=(nothing )00iplus+(nothing )−44negative 44jplus+(nothing )0k
Answers: 3
Physics, 22.06.2019 03:30
Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n
Answers: 1
Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 22.06.2019 09:30
Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential
Answers: 2
A model airplane is flying horizontally due southsouth at 4444 mi/hr when it encounters a horizontal...
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