Answer: (1, 30), (2,10), (3,40), (4,20)
Explanation:
D) Sound waves carry energy parallel to the motion of the wave, while light waves carry energy perpendicular to it.
The answer is A) velocity, because velocity is speed and displacement.
Hope this helps
PHYSICAL CHANGES :
Melting an ice cube.
Boiling water.
Mixing sand and water.
Breaking a glass.
CHEMICAL CHANGES :
Digesting food.
Cooking an egg.
Heating sugar to form caramel.
Using g=10 m/s2, the answer would be 320N
Using g=9.8 m/s2, the answer would be 313.6N