Out of the choices given, when a light wave moves from a medium where particles of matter are closely packed to a medium made of little matter. You expect the light wave to move faster and increase its speed.
The amount of gold atoms could be calculated by dividing the
total weight of the gold with the mass of a single gold atom. Just convert the
given weight to grams then divide it with 3.27x10^-22 grams. The answer would
be 7.22x10^20.
Non-metals in general are poor conductors of electricity.
<span>The elements generally regarded as nonmetals are: </span>
<span>hydrogen (H) </span>
<span>In Group 14: carbon (C) </span>
<span>In Group 15: nitrogen (N), phosphorus (P) </span>
<span>Several elements in Group 16, the chalcogens: oxygen (O), sulfur (S), selenium (Se) </span>
<span>All elements in Group 17 - the halogens </span>
<span>All elements in Group 18 - the noble gases </span>
<span>Phosphorus, sulphur and chlorine are poor conductors as " the outer electrons are not free to move and carry charge because they are held strongly in covalent bonds."</span>
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
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