A simple machine has efficiency 90%. What does it mean? No machine has 109 efficiency,why?
2 answers:
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Answer:
electric flux through the three side = 2.35 N m²/C
Explanation:
given,
equilateral triangle of base = 25 cm
electric field strength = 260 N/C
Area of triangle =
=
= 0.0271 m³
electric flux = E. A
= 260 × 0.0271
= 7.046 N m²/C
since, tetrahedron does not enclose any charge so, net flux through tetrahedron is zero.
electric flux through the three side = (electric flux through base)/3
=
electric flux through the three side = 2.35 N m²/C
Answer:
a) , b)
, c)
Explanation:
a) The initial potential energy is:
b) The efficiency of the bounce is:
c) The final speed of Danielle right before reaching the bottom of the hill is determined from the Principle of Energy Conservation: