Physics, 29.06.2019 19:00 toddjordan1928
Project 1: computations about data and signals 1. what is the frequency in hertz of a signal that repeats 80,000 times within one minute? what is its period (the length of one complete cycle)? 2. what is the bandwidth of a signal composed of frequencies from 50hz to 500 hz? 3. a signal starts at points x. as it travels to point y, it loses 8db. at point y, the signal is boosted by 10db. as the signal travels to point z, it loses 7 db. what is the db strength of the signal at point z? 4. in the preceding problem (q3), if the signal started at point x with a strength of 100 watt, what would be the power level of the signal at point z? (a = log10 b ïƒ 10a = b ) 5. what is the decibel loss of a signal that starts at point a with a strength of 2000 watts and ends at point b with a strength of 400 watts? 6. what would be the power level of a signal that starts at 50 watts and experiences a 10 db loss over a given section of wire?
Answers: 3
Physics, 22.06.2019 14:30
Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.
Answers: 2
Physics, 22.06.2019 14:30
Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules
Answers: 2
Physics, 22.06.2019 15:00
Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants
Answers: 2
Physics, 22.06.2019 19:30
Which describes increasing the efficiency of energy resource
Answers: 1
Project 1: computations about data and signals 1. what is the frequency in hertz of a signal that r...
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