Answer:
im prob too late lol but the answer would be rain or thunderstorms
Explanation:
i took the test :p
Answer:
Given mass = 2kg, height = 10m,g = 9.8.
We know that Work done W = FD
= > W = (mg)(D)
= > W = (2 * 9.8)(10)
= > W = 196 Joules.
Explanation:
Yan :).
Answer:E = 9.54×10-²Joules
Explanation:
Energy of photon E = hc/¶
Where ¶ is the wavelength
Given h = 6.63×10-³⁴ c= H = 6.02×10²³ ¶ = 418nm = 418 ×10^-9
Substituting the values in the formula
E = 6.63×10-³⁴×6.02×10²³/418 ×10^-9
E = 9.54×10-²Joules
Answer:
D. They don't require a medium to travel through.
Explanation:
Electromagnetic waves and mechanical waves are both types of waves. Electromagnetic waves are waves that arise from the combination of electric and magnetic fields while mechanical waves are waves that arise as a result of transfer of energy via matter.
One major difference between these two types of waves is that electromagnetic waves such as light waves, radiowaves etc. do not need a medium to travel i.e. they can travel through a vacuum, while on the other hand, mechanical waves such as sound waves need a medium to travel.
