Answer: Light waves slow down as they travel from gas to solid.
Explanation: Light waves move fastest through gases but when going through solids, it moves much slower.
Answer:
It should be mentioned that an efficient way to work this vector addition problem is with the cosine law for general triangles (and since
a
,
b
and
r
from an isosecles triangle, the angles are easy to figure). However, in the interest of reinforcing the usual systematic approach to vector addition, we note that the angle
b
makes with the +x axis is 30
0
+105
0
=135
0
(a) The x component of
r
x
=(10.0m)cos30
0
+(10.0m)cos135
0
=1.59m
(b) the y component of
r
is r
y
=(10.0m)sin135
0
= 12.1 m.
(c) the magnitude of
r
is r = ∣
r
∣=
(1.59m)
2
+(12.1m)
2
=12.2m
(d) The angle between
r
and the +x direction is tan
−1
[(12.1m)/(1.59m)]=82.5
0
Explanation:
Answer:
C
Explanation:
further away = less strength because the magnetic field is weaker
Speech choirs are performance groups that recite speeches in unison, often with elements of choreography and costuming to help bring the speech to life. Much like musical choirs, dynamic -- volume -- range, expression and accurate coordination of syllables are all important for a successful performance.
-- Light a candle. Chemical energy stored in the wax
is converted to light and heat.
-- Turn a flashlight on. Chemical energy stored in the battery
is converted to electrical energy, which flows through the wiring
to the light-bulb. As the electric current current flows through the
bulb, electrical energy is converted to light and heat.
-- Plug a fan into a wall outlet. Electric current flows through
the line-cord to the motor, where electrical energy is converted
to kinetic energy. The kinetic energy of the motor is sent to turn
the fan blades, where it is used to move air.
-- Electromagnetic energy from the sun strikes the surface of a
photoelectric cell, where it is converted to electrical energy.
