A galvanometer of 50 ohms which gives 2 full scaled deflection from 1mA is to be adopted to measure currents of up to 5A (i) calculate the resistance of the resistor required (ii) if the resistor is made up of two materials of cross sectional area 4 x 10^-4 and resistivity 2 x 10^-6 -2cm. calculate its length​

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

How is science controlled by the governerment

How can a cyclist's acceleration change even if its velocity remains constant?