Answer:
Energy needed = 1100 kJ
Explanation:
Energy needed = Change in kinetic energy
Initial velocity = 15 m/s
Mass, m = 1600 kg
Final velocity = 40 m/s
Energy needed = Change in kinetic energy = 1280000-180000 = 1100000J
Energy needed = 1100 kJ
Answer:
B) protons and neutrons.
Explanation:
The protons and neutrons are located in the nucleus of the atom and represent most of the 'mass' of the atom, that's their count that determine the 'mass' of an atom (like 12 for Carbon).
The electrons rotate around the nucleus and have a negligible mass.
<span>v=40 <span><span>cm</span>s</span> speed of wave</span>
<span>λ=8 cm wavelength</span>
<span>f=? frequency of wave</span>
<span>v=λ⋅f</span>
<span>40=8⋅f</span>
<span>f=<span>408</span></span>
<span>f=5 <span>s<span>−<span>1 is the answer </span></span></span></span>
The answer is C upwards at 20cm
