An electric field of 4.0 ?V/m is induced at a point 2.0 cm from the axis of a long solenoid (radius = 3.0 cm, 800 turns/m). At what rate is the current in the solenoid changing at this instant?
a. 0.50 A/s
b. 0.40 A/s
c. 0.60 A/s
d. 0.70 A/s
e. 0.27 A/s
b
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Constant Angular Acceleration: A wheel starts from rest and has a uniform angular acceleration of 4.0 rad/s2. After the wheel completes its first revolution, how long does it take for it to make its second complete revolution?
Fill in the blank(s) with the appropriate word(s).
The property of cleavage reflects:
-the luster of the mineral. -the hardness of the mineral. -the streak of the mineral. -mechanical breakage along planes of weakness within the mineral. -the density of the mineral.
A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s. If the driver realizes they must stop the car at this time. It takes 0.20 s for the driver to apply the brakes
What must the constant acceleration of the car be after the brakes are applied so that the car would come to rest at the stop sign? A) 2.89 m/s2 B) 3.89 m/s2 C) 4.17 m/s2 D) 3.42 m/s2 E) 2.08 m/s2
Magnetism is due to the motion of electrons as they
A) move around the nucleus. B) spin on their axes. C) both of these D) neither of these