Answer:
B
8.5 km/h east
Explanation:
Relative velocity= Va -Vb
=10-1.5
=8.5 km/h east
If you're calculating the power of an athlete who is lifting weights,
or the power of a windmill that is pumping water from a well, or
the power of two horses turning millstones, then those electrical
units won't help at all.
But if you happen to be calculating the power delivered to an
electrical circuit or dissipated by an electrical device, then you
can use ...
(voltage) times (current)
or
(voltage)² divided by (resistance)
or
(current)² times (resistance) .
The choice just depends on which quantities you know
or can easily measure.
Let's calculate the angle between two spots, 0.5 cm apart,
that are 10m away from you.
1 m = 100 cm
10m = 1,000 cm
The angle between the two spots is very very close to the angle
whose tangent is
0.5cm/1,000cm = 0.0005 .
That angle is tan⁻¹(0.0005) = 0.0005 radian = 0.029 degree .
Matilda is looking at two stars that appear to be 0.001 radian apart.
That's (0.001 / 0.0005) = 2 = TWICE as far apart as Arthur can distinguish.
As long as Arthur and Matilda are on the same planet while looking at
these two stars ... or as long as they're even in the same solar system ...
Arthur will have no trouble separating them.
Disagree.
Fluoresce objects will only glow when put under actual Ultraviolet light. This is due to the molecules becoming excited by the ultraviolet radiation.
Microwaves give micro-waves that are present in another spectrum of wave length and will not be able to fluoresce the molecules. If it’s not “ultra violet “.... it’s not going to glow.