Answer:
The answer is below
Explanation:
Distance is a measurement of how far apart two points are. Distance is a scalar quantity, i.e. it has magnitude and no direction.
Total distance traveled = distance traveled north + distance traveled east + distance traveled south
Total distance traveled = 100 + 50 + 60 = 210 meters
Displacement is the shortest distance between the starting and end points.
displacement² = 50² + (100 - 60)²
displacement² = 2500 + 1600
displacement = 64 meters
The displacement of the journey is vector, because displacement is a vector quantity.
Answer:
Tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids. (D).....
Answer:
28.9°
Explanation:
Parameters given:
Angle of incidence, i = 40°
Refractive index, n = 1.33
Refractive index is the ratio of the sine of the angle of incidence, i, and the sine of the angle of refraction, r :
Therefore:
=>
r = 28.9°
The angle of refraction is 28.9°.
Wave speed = frequency * wavelength
Wave speed = 686 * 2.00
Wave speed = 1,372 (m/s)
Answer:
D
Explanation:
The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.