The graph shows a Hertzsprung-Russell diagram. The luminosity of the Sun is 1.
Complete the labels for the regions on the Hertzsprung-Russell diagram.
1. .
2. .
3. .
4. .

Write your answers for all four labels in the single answer box below. Immersive Reader
(4 Points)

PLEASE SOMEONE HELP, I WILL RATE U 5 STAR AND BRAINLIEST!

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.