What correction do you suggest to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit?
What will be an ideal response?
Answer: Mainly, remind your friend of the conservation of energy. Although a transformer can step up or step down voltages and currents, in no way can it do the same with energy. Energy can neither be created nor destroyed.
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When water freezes, it expands about nine percent. What would be the pressure increase inside your automobile engine block if the water in there froze? The bulk modulus of ice is 2.0 × 109 N/m2, and 1 atm= 1.01 × 105 N/m2.
A. 18 atm B. 360 atm C. 1100 atm D. 1600 atm E. 600 atm
When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight line path is a constant -6.0 m/s2 . What displacement does it undergo during this deceleration period?
a. 120 m c. 320 m b. 300 m d. 240 m
Three negative charges of equal magnitudes are positioned along the x-axis at x = -a, x=0, and x = +a respectively. The charge located at x=0 is moved away along the y-axis to a position (x,y) = (0, +a)
How does the potential energy of the system of charges change as a result? A) The potential energy may increase or decrease depending on the magnitude of the charges. B) The potential energy increases. C) The potential energy decreases. D) The potential energy stays the same. E) More information is needed to answer the question.
Discuss your understanding of the author's meaning in the statement, referring to efficiency of a hydrogen economy that "if solar energy is the source of the energy
, the efficiency" of the hydrogen energy production system "is of less concern."