Protons neutron electrons
Radio waves have the longest wavelength
Explanation:
Average speed = distance / time
|v| = (7 km + 2 km) / (2 hr + 1 hr)
|v| = 3 km/hr
Average velocity = displacement / time
v = (7 km east + 2 km east) / (2 hr + 1 hr)
v = 3 km/hr east
Answer:
Sound is produced by an object vibrating and creating a pressure wave.
Explanation:
The answer you are looking for is D. 245N.
Work shown: -mg= -25*9.8=245 N
So, gravity is pulling down the chair, the chair is exerting a normal force upward in response.
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