Answer:
PRECAUTIONS
-The refracting faces of the glass prism should be smooth, transparent and without any air bubble or broken edge. ...
-Use a sharp pencil to draw boundary of the prism and rays of light.
-The alpins should have sharp tip and should be fixed exactly vertical to the plane of the paper.
Explanation:
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Answer:
1.18 sec
Explanation:
v = 0
u = 3.25m/s
v = u - gt
t1 = u/g = 3.25/9.8 = 0.332 s
height above board = v²/2g =
3.25²/(2×9.8) = 0.54 m
time to fall from there to water
t2 = √(2h/g) = √(2(3+ 0.54)/9.8) = 0.85 s
total time = t1 + t2
total time = 0.85 + 0.332 = 1.182 s
<span>The relationship between the electric field strength at a point and its distance from the source charge is inversely proportional. As the electric field strength increases the charges are more closer to each other which means the distance between the is smaller. It is seen by the equation:
E = </span><span>(1/4*pi*epsilon0) (Q/r^2)</span>
Answer:
in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing.
Explanation:
When oxygen is mixed in a chemical reaction, it acquires two electrons from magnesium, to become an ion with 2 negative .
Mg + O → MgO
Therefore, in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing
The correct answer is
(1) a 15-kg mass traveling at 5.0 m/s
<span>In fact, the inertia of an object depends only on its mass. The inertia gives a measure of "how hard is to put an object in motion", or "how hard is to stop an object in motion": the greater the mass, the larger the inertia of the object. In this problem, we have 4 objects, and the object with greatest mass is the first one (15 kg), therefore this is also the object with greatest inertia.</span>
