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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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
Saturn's rings are extremely old, possibly older than four billion years
Indicate whether the statement is true or false
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?
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)