Answer: (1) The correct answer is A.
(2) The correct answer is D.
Explanation:
(1)
Reflection is the sending back of light from the surface without absorbing it. In the reflection phenomenon, the wave does not continue moving forward.
Diffraction is the bending of the light around the obstacle. In the diffraction phenomenon, the wave travels forward after striking around the obstacle.
Therefore, the correct answer is A.
(2)
Amplitude is the maximum displacement in the medium from the rest position.
The amount of energy is related to the amplitude. Amplitude is related to the amount of energy carried by the wave. Low energy wave is characterized by a low amplitude. High energy wave is characterized by a high amplitude.
Therefore, the correct option is D.
Answer:
Explanation:
Given
Operating temperatures are
is of Carnot refrigerator
actual
Also,
Answer:
Yes
Explanation:
Dendrites bring electrical signals to the cell body and axons take information away from the cell body.
|momentum| = (mass) x (speed)
Momentum of each arrow = (0.1 kg) x (30 m/s) = 3 kg-m/s
Everything is equal for the two arrows, except their direction.
So the total momentum vector of the 2-arrow system consists of
-- a 3 kg-m/s component pointing east
plus
-- a 3 kg-m/s component pointing south.
The magnitude of the total momentum is
√ [ (3 kg-m/s)² + (3 kg-m/s)² ]
= √ [ 9 kg²-m²/s² + 9 kg²-m²/s² ]
= √ [ 18 kg²-m²/s² ]
= 3√2 kg-m/s (approx 4.243 kg-m/s)
The direction of the total momentum vector is the angle
south of east whose tangent is
(3 kg-m/s) / (3 kg-m/s)
= tan⁻¹ (1)
= 45° south of east.
That direction is southeast.