Throughout this question, assume that the universe the universe only contain: s matter and a possible cosmological constant. i̇mat constant-d0hg given that in any realistic cosmology ωmat-1 at early times, compute the hubble parameter at decoupling (zdec 1000) as a fraction of its present value. as the only important characteristic scale in the young universe, the hubble length ch-1 gives the characteristic scale of the first peak in the microwave background. in a spatially-flat cosmology with a cosmological constant, the present physical distance to an object with z 1 is given approximately by 2cho

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?