བཅད།
+3. Which statement is TRUE about the unit vectors î, j and k?
A. Their directions are d...
བཅད།
+3. Which statement is TRUE about the unit vectors î, j and k?
A. Their directions are defined by a left-handed coordinate system.
B. The angle between any two is 90 degrees.
C. Each has a length of 1 m.
D. Ifî is directed east and ſ is directed south, k points up out of the
surface.
Answers: 1
Physics, 22.06.2019 02:00
In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth
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Physics, 22.06.2019 17:30
Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s
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Physics, 22.06.2019 22:30
Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?
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Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53
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Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53
Mathematics, 03.02.2020 17:53