Echoes occur when a reflected soundwave reaches the ear more than 0.1 seconds after the original sound wave was heard. ... There will be an echoinstead of a reverberation. Reflection of sound waves off of surfaces is also affected by the shape of the surface.
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Answer:
The force is 86.5×10^9 N towards the negative charge (to the right)
Explanation:
The electrostatic force on the charges is given by Coulomb's law;
F= Kq1q2/r^2
This an inverse square law.
F= electrostatic force on the charges
K= constant of Coulomb's law
q1 and q2= magnitude of the charges
Since K= 9.0×10^9Nm^2C^2
F= 9.0×10^9 × 5 × 3/(1.25)^2 = 135×10^9/1.56
F= 86.5×10^9 N
The force is 86.5×10^9 N towards the negative charge.
Answer:
Explanation:
7.0 - 4.0 = 3.0 kg water
3.0 kg(2.26 x 10⁶ J/kg = 6.78 x 10⁶ J
220 V(15 A) = 3300 W
1 W = 1 J/s
6.78 x 10⁶ J / 3300 J/s = 2054 s
2054 s / 60 s/min = 34 min
Answer:
[M L2 T-2]
Explanation:
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