B. 2
Two concepts being tested here – the pattern of distribution of electrons and the octet rule.<span> </span>
Blood is a suspension.
In a suspension, solute-like particles
of a substance are blended with a solvent-like fluid but are not dissolved. Blood
is a suspension of blood cells and platelets. It contains large particles large
enough ( to settle) for sedimentation.
Erythrocytes are cells that
transport oxygen from the lungs to the body It also removes and transports
carbon dioxide from body tissues to the lungs. The average adult has
approximately 5million cells/ul. Its production is controlled by erythropoietin. Erythropoietin
is produced by the kidneys.
Which type of EM wave is about the size of a building?
B. Radio wave
North component: y = 15.0 m * sin 55.0º = 12.3 m West component: x = 15.0 m * cos 55.0º + 7.00 m = 15.6 m
so his heading, measured from West, is Θ = arctan(y/x) = arctan0.787 = 38.2º N of West
and measured from North is φ = arctan(x/y) = arctan(1.27) = 51.8º W of North
Hope this helps!
