What is the initial direction of the magnetic force acting on the particle in each case?
A. Forward
B. Backward
C. Rightward
D. Leftward
E. Into the paper
F. Out of the paper
T. (Zero force)
D. Leftward
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An iron stove, used for heating a room by radiation, is more efficient if:
A. its inner surface is highly polished B. its inner surface is covered with aluminum paint C. its outer surface is covered with aluminum paint D. its outer surface is rough and black E. its outer surface is highly polished
Consider the sun and its largest planet Jupiter. On the line joining them, how far from the center of the sun is their center mass?
Is it within or outside the sun? (Jupiter-sun distance is 778 × 106 km, diameter of the sun is 1.4 × 106 km, the sun is 1000 times as massive as Jupiter)
A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applied to the string, causing the pulley to rotate and the string to unwind
If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley? A) 0.17 kg?m2 B) 17 kg?m2 C) 14 kg?m2 D) 0.20 kg?m2 E) 0.017 kg?m2
What POWER lens placed next to a lens of 25. cm focal length would produce a combination with an effective INFINITE focal length?
What will be an ideal response?