1. It is observed that most of the galaxies in the universe are moving away from our system reference. The Sombrero Galaxy is emitting light with a wavelength
700 nm. a) If the galaxy is moving away with a speed of 90,000 km / s, what is the
perceived frequency on Earth? b) If the galaxy is approaching with a speed of
90000 What is the perceived frequency on Earth?

Six solutions are made, each with a y concentration of 1.0 μm and varying concentrations of ab as shown below. based on the concentrations, rank the solutions in decreasing order of reaction rate.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?