Answer:
Gravity
Explanation:
When the ball is falling to the ground, it is already detached from the table, so the table does not exert any force on it.
Gravity is always present, therefore it is acting on the ball (acting downward), so it must be included into the free-body diagram. Apart from that, there are no other forces acting on the ball (if we neglect air resistance, which is negligible, and it is not mentioned in the options given), therefore the only force which has to be included in the diagram is gravity.
Answer:
a) E = V/L x^
b) R = ρL/A = ρL/π(d/2)^2 = 4ρL/πd^2
c) I = V/R x^ = V/(4ρL/πd^2) x^ = πd^2*V/4ρL x^
d) J = I/A = [πd^2*V/4ρL x^]/π(d/2)^2 = V/ρL x^
e) ρJ = ρ(V/ρL x^) = V/L x^ = E
Answer:
0.133 A
Explanation:
Given:
The voltage difference is, 
The resistance of the circuit is, 
Now, as per Ohm's Law, the potential difference across two points in a circuit is directly proportional to the current supplied in the circuit. The constant of proportionality is the resistance of the circuit.
Hence, the mathematical statement of Ohm's law is given as:
Where 
is the current in the circuit.
Now, plug in 16 for 'V' and 120 for 'R' and solve for 'I'. This gives,
Therefore, the current in the circuit is 0.133 amperes.
Aansi has to increase the temperature for sound wave to be carried more quickly through a metal medium.
<h3>What is temperature?</h3>
The temperature is the degree of hotness or coldness of the object.
When the temperature of any medium is increased, it becomes less dense. The wave travels faster in the rarer medium than the denser medium. So, in less denser medium, wave travel more faster.
Thus, Aansi has to increase the temperature for sound wave to be carried more quickly through a metal medium.
Learn more about temperature.
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