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Classifying Galaxies
Which characteristic is used to classify galaxies?
the size of the galaxy
the shape of the galaxy
the presence of dust and gas between stars
the presence of active star formation sites

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm