A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 20° with a speed of 24.5 m/s. What is the minimum coefficient of static friction required for the car not to skid?
A) 0.12
B) 0.24
C) 0.36
D) 0.48
E) 0.60
A
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During the fusion process, mass is converted into energy
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A converging lens with two convex surfaces has a front surface with radius of curvature of 10.0 cm; the back surface has radius of curvature of 30.0 cm, and the lens is made from material with an index of refraction of 2.50 . What is the focal length of the lens?
a. -13.3 cm c. 5.00 cm b. 4.44 cm d. 0.250 cm
We have a hollow metallic sphere with charge ?5.20 µC and radius 5.40 cm. We insert a +10.4-µC charge at the center of the sphere through a hole in the surface. What charge now rests on the outer surface of the sphere?
a. +5.20 µC b. +15.6 µC c. –5.20 µC d. –15.6 µC e. –10.4 µC
A fully charged 37-µF capacitor is discharged through a 1.0-k? resistor. If the voltage across the capacitor is reduced to 7.6 volts after just 20 ms, what was the original potential across the capacitor?
A) 11 V B) 8.0 V C) 9.0 V D) 16 V E) 13 V