The sun radiates energy at the rate 3.8*10^26w. the source of this energy is fusion, a nuclear reaction in which mass is transformed into energy. the mass of the sun is 2.0*10^30kg. part a) how much mass does the sun lose each year? (delta m)

part b) what percentage is this of the sun's total mass?

(deltam/m) %

part c) estimate the lifetime of the sun. (t)

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

Describe uniform velocity and variable velocity in short

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?