Physics, 22.10.2020 07:01 pippalotta
HELP PLEASE!
A particle moves along the x-axis, with x given in meters. Its position is described by the following equation: x(t) = 6 + 4t - 7t^2.
A) Determine its position, velocity, and acceleration at t = 3s
B) Its position when it changes direction
C) Its velocity when it returns to the position it had at t = 0
Answers: 1
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Physics, 22.06.2019 03:30
The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.
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An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2
Answers: 1
HELP PLEASE!
A particle moves along the x-axis, with x given in meters. Its position is described b...
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