Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is closed,
a.
bulb 1 glows more brightly.
b.
bulb 2 glows more brightly.
c.
both bulbs continue to glow with the same brightness.
d.
bulb 1 goes out.
e.
bulb 2 goes out.
d
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The tension in a string from which a 4.0-kg object is suspended in an elevator is equal to 44 N. What is the acceleration of the elevator?
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A spring-powered launcher has a spring with a spring constant of 50.0 N/cm. The launcher is prepared to launch a projectile by compressing the spring by 5.00 cm. If the mass of the projectile is 10.0 grams, then what is the velocity of the projectile when it is launched from the launcher?
A. 65.4 m/s B. 52.8 m/s C. 45.7 m/s D. 40.5 m/s E. 35.4 m/s
Each of two small non-conducting spheres is charged positively, the combined charge being 40 ?C. When the two spheres are 50 cm apart, each sphere is repelled from the other by a force of magnitude 2.0 N. Determine the magnitude of the smaller of the two charges.
A. 1.4 ?C B. 1.1 ?C C. 2.0 ?C D. 3.3 ?C E. 17 ?C