Physics Important

Calculation for average orbital speed

2 pie radius/ time

formation process of stable stars

Nebula cloud collapse due to gravity

Spin faster

Protostar formed by accretion

Stable star when nuclear fusion starts and inward force, gravitational force, equals to outward force, heat.

Value for 1 light year

9.5 × 10 power 15 m

Process to end of small stable star

Hydrogen runs out

Expand to be red giant

Outer layers have weak attraction to center is blown off in ring and forms planetary nebula

Core left behind forming white dwarf star

Process to end of large stable stars

Hydrogen runs out

Expands into red supergiant

Its force outward, heat, outweighs inward force causing explosion

Supernova

Form neutron star or blackhole

Value for hubble constant

2.2 × 10 power -18

How to calculate age of universe

1/ Hubble constant

How wavelength affects diffraction at edge

Longer wavelength = more diffraction

Shorter wavelength = less diffraction

Range of normal human hearing

20Hz to 20000Hz

Equation for speed in freefall

½ gt sq

What is nucleons

any particle in nucleus of atom: proton and neutron