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A progressive wave is given T=0.52π(40t-20x) find
a)amplitude
b)frequency
c)wavespeed
e)wavelenght
What is kirchoff junction rule
Three identical point masses are placed at the corners of an equilateral triangle of sides"R". If the mass of each particle is "M" then the magnitude of the netforce on each particle is??
1. A copper cube with sides of length 40mm had its surface blackened. The cube is heated up to 500K and place inside a room at a constant temperature of 300K. Calculate the initial rate of temperature fall of the cube, assuming it is a perfect blackbody. Take S.H.C of Aluminium to be 400J/kg/K, density of aluminium-7800kg/m'.
Ahydraulic press has pistons of area 0.006 m² and 0.35 m², respectively. A force of 25 N is applied to the smaller one. Find the pressure exerted on the smaller piston and on the big piston. What is the lifting force on the bigger piston?
At what ocean depth is the liquid pressure equal to 152 cm Hg? What is the absolute pressure at that depth? Density of the sea water is 1030 kg/m³
Airplane normally fly at altitude of 36000 ft. Find the atmospheric pressure at that altitude.
Why are not all energy transitions shown in the emission line spectra?? For example, lithium has multiple energy transitions, however, only has a few line spectra (of which only the visible lines match up with energy level diagram)... so how come some photons don't appear on the spectrum?
A vector 𝑹̅ has a direction of 30o with respect to the y-axis. Draw this vector and find its x and y components if its magnitude is 7 m.
A phcn service is made up of seven strands of aluminum wire each wire has a diameter of 1.7mm calculate the cross sectional area of the service cable
