A 10-kg object, hung by an ideal spring, causes the spring to stretch 2.0 cm. What is the spring constant for this spring?
A) 5.0 N/cm
B) 49 N/cm
C) 0.20 N/cm
D) 20 N/m
E) 0.0020 N/cm
B
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Earth's magnetic field is generated by the dynamo effect in the
a. molten metallic core. b. solid central core. c. plastic mantle. d. crust. e. aurora.
Compared to life on Europa, if life exists on Ganymede it will probably be
A) less abundant and less evolved B) more abundant and more evolved C) less abundant but more evolved D) more abundant but less evolved
The position of a particle as it moves along the x axis is given by x = 15e?2t m, where t is in s. What is the acceleration of the particle at t = 1.0 s?
a. 22 m/s b. 60 m/s c. 8.1 m/s d. 15 m/s e. 35 m/s
A car enters a 300-m radius horizontal curve on a rainy day when the coefficient of static friction between its tires and the road is 0.600. What is the maximum speed at which the car can travel around this curve without sliding?
A) 29.6 m/s B) 33.1 m/s C) 24.8 m/s D) 42.0 m/s E) 37.9 m/s