Which characteristics of asteroids are used to classify them?
What will be an ideal response?
albedos (reflected brightness) and spectroscopic colors (gray to red)
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Saturn's rings are extremely old, possibly older than four billion years
Indicate whether the statement is true or false
A rod system with a uniform linear density of l = 4.40 kg/m has the shape shown in the figure, with rod 1 the vertical rod and rod 2 the horizontal rod. Rod 1 has length L1 = 8.00 m, and rod 2 has length L2 = 7.50 m. Neglect the diameter of the rods
?
What is the center of mass of the system?
a.
(1.29 m, 3.31 m)
b.
(2.06 m, 3.10 m)
c.
(3.31 m, 1.29 m)
d.
(3.10 m, 2.06 m)
A square loop (L = 0.20 m) consists of 50 closely wrapped turns, each carrying a current of 0.50 A. The loop is oriented as shown in a uniform magnetic field of 0.40 T directed in the positive y direction. What is the magnitude of the torque on the loop?
A. 0.21 N ? m B. 0.20 N ? m C. 0.35 N ? m D. 0.12 N ? m E. 1.73 N ? m
The position of an object that is oscillating on an ideal spring is given by the equation x = (12.3 cm) cos[(1.26s-1)t]. At time t = 0.815 s, (a) how fast is the object moving? (b) what is the magnitude of the acceleration of the object?
What will be an ideal response?