Let's call d the distance of the cannon from us. We see the flash first, then after 6.9 s we hear the sound. The flash arrives to us traveling at speed of light, which is
, while the sound travels at speed
. Since the magnitude of the speed of light is much much larger than the speed of sound, we can assume that the flash arrives at our location instantaneously after the firing.
Then we can say that the sound wave covers a distance d traveling at speed v in a time of t=6.9 s. Since it is a uniformly linear motion, the distance covered by the sound wave is
So, this is the distance of the cannon from us.
Answer:
Value of angle between vector a and b is .
Explanation:
Vectors a and b have scalar product 6.00
Let be the angle between a and b.
ab cos = 6 ...(1)
Vectors a and b have magnitude of vector product 9.00
ab sin = 9 ...(2)
Dividing equation (2) by (1) we get
tan = 1.5
=
Thus, value of angle between vector a and b is .
The magnitude of a displacement is the straight-line distance
from the beginning point to the end point, regardless of the path
that was taken to get there.
Juan's displacement is the straight-line distance from the bottom
of the staircase to the top.
That's 10 meters.
<h2>Answer:</h2>
<u>The apparent magnitude of an object only tells us how bright an object appears from Earth while the absolute magnitude is the apparent brightness of a star if it were viewed from a distance of 32.6 light-years</u>
<h2>Explanation:</h2>
The apparent magnitude of an object only tells us how bright an object appears from Earth. Alternatively, if we know the distance and the apparent magnitude of a star, we can calculate its absolute magnitude. There are three factors which control the apparent brightness of a star as seen from Earth which are how big it is, how hot it is, and how far away it is. The absolute magnitude is a measure of the star's luminosity or the total amount of energy radiated by the star every second.
"Circulatory system" does that, as all about transportation of blood within the body comes under it's work
Hope this helps!