MgCl2
Mg = magnesium
Cl = chlorine
Magnesium + chlorine = magnesium chloride.
This is because compounds are always written with the METAL FIRST and the NON METAL SECOND. the non metal ends in - ide when it reacts with a metal.
So ur answer would be magnesium chloride. :)
Answer:
Speed Unchanged.
Explanation:
As work is defined as a product of force over a distance. If the distance in altitude is constant = 500km, there's 0 change in distance and force, no work would be done by the gravitational force.
Since potential energy of the satellite is unchanged, unless there's additional internal energy source, the kinetic energy would remain unchanged, so would its speed.
Imagine a ball is moving on the following horizontal line.
. . . . . . . . . . . . . . . . . . . O. . . . . . . . . . . . . . . . . .
Take right as positive. O is the starting point of the ball. Denote the ball by o.
. . . . . . . . . . . . . . . . . . . O. . . . . . . ... . . o . . . . . .
Assume the ball is moving to the right. It has positive displacement since it is on the right of O, and positive velocity since its positive displacement is increasing.
.ñ
. . . . . . . . . . . . . . . . . . . O. . . . o . . . . . . . . . . . . .
Now the ball is returning to O. It still has positive displacement since its current position is still on the right of O. However, its velocity is negative since its positive displacement is decreasing and the direction of the velocity vector points left, which is the negative side.
By now you should be able to come up with a scenario where the ball has negative displacement and positive velocity.
You can observe the same phenomenon in daily life. Say, as a stretched spring bounces to its starting position, if we let the returning direction be positive, the string has negative displacement since it is on the negative direction, but has positive velocity. Bungee jump can also used to illustrate the phenomenon.
For transverse waves<span> the displacement of the medium is perpendicular to the direction of propagation of the </span>wave<span>. A ripple on a pond and a </span>wave<span> on a string are easily visualized </span>transverse waves<span>. Hope this helps. Have a nice day. Feel free to ask more questions.</span>
Answer:
Explanation:
for us to rank them we need to calculate the angle of refraction for the various materials. The angle of refraction is the angle between the refracted ray and the normal.
refractive index(n) = velocity of light in air/ velocity of light in medium
refractive index (n) = sini/sinr
lets equate the right side of both equations.
we will assume 30 degree as the angle of incidence for all materials.
(a) water
sinr = 0.75c/c *sin30
sinr = 0.375
r= arcsin0.375
r=22.02°
(b) ethyl alcohol
sinr = 0.7c/c *sin30
sinr = 0.35
r= arcsin0.35
r=20.49°
(c) crown glass
sinr = 0.6c/c *sin30
sinr = 0.3
r= arcsin0.35
r=17.46°
it is observed that the angle of refraction decreases as the velocity of light in glass decreases.
ranking the materials according to how much the light ray bends toward the normal, from most bending to least bending we have;
Crown glass > ethyl alcohol> water