Use the inverse square law for light to answer each of the following questions. Part A Suppose a star has the same luminosity as our Sun (3.8×1026watts) but is located at a distance of 10 light−years . What is its apparent brightness?

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

What are similarities and differences between refraction, reflection, diffraction and absorption?