The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave with the largest amplitude is
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above.
a,b
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A girl is sitting on the edge of a pier with her legs dangling over the water. Her soles are 80.0 cm above the surface of the water. A boy in the water looks up at her feet and wants to touch them with a reed. (nwater = 1.333.) He will see her soles as being
a. right at the water surface. b. 53.3 cm above the water surface. c. exactly 80.0 cm above the water surface. d. 107 cm above the water surface. e. an infinite distance above the water surface.
If two metal balls each have a charge of -10-6 C and the repulsive force between them is 1 N, how far apart are they? (Coulomb's constant is k=9.0 × 109 N.m2/C2.)
A. 9.5 m B. 9.0 mm C. 0.9 m D. 9.5 cm
The SI units of velocity are
a. mi/h. b. km/h. c. m/s2. d. m/s. e. none of the above
Describe in detail the observational properties of a pulsar. From these properties, how is it possible to interpret it as a neutron star?
What will be an ideal response?