An electrical motor spins at a constant 2857.0 rev/min. If the armature radius is 2.685 cm, what is the acceleration of the outer edge of the armature?
A) 2403 m/s2
B) 844.4 m/s2
C) 241,100 m/s2
D) 84.40 m/s2
A
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Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has negative velocity and zero acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E
A single-crystal wafer of silicon is to be used as a substrate for the deposition of thin-metal films that could be affected by the substrate’s crystallographic orientation. However, the crystallographic orientation of this particular wafer is not known. The wafer is placed in an x-ray diffractometer with a copper x-ray tube with a K? x-ray line at 0.1542 nm, and an intense peak is measured at an angle of 29.46°. Silicon is FCC with a lattice parameter of 0.543 nm. What planes are parallel to the surface of this silicon crystal?
What will be an ideal response?
If you drop a pencil while riding on a smooth riding bus, why does the pencil land at the same place it would if the bus were at rest?
What will be an ideal response?
Two beams of particles can be made to collide head-on at the point where the reactions are studied, providing a larger collision energy than from collisions with a stationary target. This must be true because to calculate available energy
A. actual velocities are more important than relative velocities. B. what counts is the velocity of the particles relative to the distant stars. C. what counts is the velocity of the particles relative to the Earth's rotation. D. actual velocities are less important than relative velocities.