Ke= 1/2 x m x v^2
Ke= 1/2 x 2.1 x 30^2
Energy = 945 J
Answer:
sum of the two forces as both point to the right is a force that points to the right,
Explanation:
The force on the cast load at point Y is given by
F = q_y E
force is a vector magnitude so its result is
∑ F = Fₐ + F_b
indicate that the charge at y is negative, we analyze the direction of the force created by each charge
Charge A
as the electric field is incoming the charge is negative and as the test charge is negative both repel each other, consequently the force points to the right
Charge B
in this case the electric field lines are salient, therefore the charge is positive, consequently the force on the charge at y is attractive and points to the right
the sum of the two forces as both point to the right is a force that points to the right, that is, in the direction of the charge located at B
Answer:
24volts
Explanation:
If a 15-µF capacitor is charged to 40V, the charge across the capacitor can be calculated using the formula;
Q = CV where;
Q is the charge flowing across the capacitor
C is the capacitance of the capacitor. = 15-µF
V is the voltage = 40V
Q = 15×10^-6×40
Q = 0.0006coulombs
If the charge of 0.0006coulombs is then connected across an initially uncharged 25-µF capacitor, the potential difference across the 25-µF can be calculated using the initial expression;
Q = CV
V = Q/C
V = 0.0006/25×10^-6
V = 24Volts
Therefore, the final potential difference across the 25-µF capacitor will be 24volts
Sounds are reflected best when bounced off the flat surfaces.
<h3>What is a sound wave?</h3>
A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.
Since sound waves cannot easily pass through hard surfaces, they bounce off them instead, reflecting back to the source which they first came from.
When sound is reflected off of flat surfaces, it does so most effectively.
Hence the flat surface is the correct answer.
To learn more about the sound wave refer to;
brainly.com/question/11797560
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