You need an inductor that will store 20 J of energy when a 3.0-A current flows through it. What should be its self-inductance?
A) 4.4 H B) 90 H C) 3.7 H D) 60 H
A
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Free Fall: An astronaut on a strange new planet having no atmosphere finds that she can jump up to a maximum height of 27 m when her initial upward speed is 6.0 m/s. What is the magnitude of the acceleration due to gravity on the planet?
Fill in the blank(s) with the appropriate word(s).
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
A) slowed. B) speeded up. C) not affected.
From a location in the United States of America, a star is observed to be rising due East. Where will this star be located 6 hours later?
A) Directly overhead B) High in the Northern sky C) High in the southern sky D) Setting due West E) The location of the star cannot be determined from the information given.
Light from distant stars that must pass through dust arrives bluer than when it left its star
Indicate whether the statement is true or false