Answer:
barred spiral galaxy
Explanation:
There exist various forms of galaxies which include barred spiral, spiral, irregular and elliptical galaxies.
The galaxy we live in, the milky way galaxy i structured in the form of a spiral with bars located within it hence its a barred spiral galaxy. It is composed of six parts which includes the nucleus,a disk, spiral arms, central bulge, sphere and a halo.The components interact with each other.At the center of the milky way galaxy resides a massive black-hole called Sagittarius.
All of these are chemical changes except evaporation.
Answer: a) Theory
Explanation: “Dalton’s Atomic Theory”
b) When iron rusts in a container... is an Observation
c) The “Law”of Conservation of Mass
d) is an observation
Answer:
ω, the angular frequency of the source equals 377 rad/s
Explanation:
From the question, V(t) = V cosωt.
Now, ω = the angular frequency of the sinusoidal wave is given by
ω = 2πf where f = the frequency of the source = 60 Hz
So, the angular frequency of the source ,ω = 2π × the frequency of the source.
So, ω = 2πf
ω = 2π × 60 Hz
ω = 120π rad/s
ω = 376.99 rad/s
ω ≅ 377 rad/s
So, ω, the angular frequency of the source equals 377 rad/s
Power is the rate of doing work.
Its unit is joules/second.
That unit is used so often that a new word was adopted for it.
1 joule/sec = 1 watt