To understand the standard formula for a sinusoidal traveling wave. one formula for a wave with a y displacement (e. g., of a string) traveling in the x direction is y(x, t)=asin(kx−ωt). all the questions in this problem refer to this formula and to the wave it describes. a) which are independent variables? b) which are parameters that determine the characteristics ofthe wave? c) what is the phase phi(x, t) of the wave? d) what is the wavelength lambda of the wave? e) what is the period tof this wave? f) what is the speed of propagation v of this wave?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?