The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The acceleration in m/s2 after starting from rest is
a. 0 d. 8
b. 2 e. 16
c. 4
C
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The radius of a sphere is 2.00 m. The surface area of the sphere is
A. 36.7
B. 50.3
C. 72.5
D. 75.0
The howler monkey is the loudest land animal and can be heard up to a distance of 9.8 km. Assume the acoustic output of a howler to be uniform in all directions
The distance at which the intensity level of a howler's call is 25 dB, in SI units, is closest to: A) 550 B) 660 C) 830 D) 940 E) 1,100
Hydrostatic equilibrium refers to the balance between weight and pressure
Indicate whether the statement is true or false
By scattering alpha particles from gold, Rutherford showed the atomic nucleus to be very
A) small relative to the atom. B) massive relative to the mass of an electron. C) both of these D) neither of these