Do 6. Most stars in the universe fit into one of the four areas on this Hertzsprung-Russell diagram
Hertzsprung-Russell Diagram
Area X
100
Area M
20
ооо
Area z
10*
Area P
10-
Area P
Luminosity ()
1
O
Area M
10-
Area 2
CLEAR ALL
10
40,000
20,000
10,000
Temperature (K)
5,000
2,500
Which area of the diagram represents the white dwarfs?
Ok

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.

What determines the amount of inertia an object has

Whenever the net force on a moving object is zero its acceleration is