The linear momentum of a moving object is:
a. the product of its weight and its speed.
b. the product of its mass and the distance it has traveled.
c. the product of its mass times its velocity squared.
d. the product of its velocity and its mass.
e. the sum of its mass and its velocity.
d
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What are the dark regions that give the Sun's photosphere a mottled appearance?
a. CMEs b. sunspots c. spicules d. granules e. flares
Photoelectric Effect: The work function of a particular metal is 4.20 × 10-19 J. What is the photoelectric cutoff (threshold) wavelength for this metal? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 473 nm B. 308 nm C. 393 nm D. 554 nm
Which of the following is not generally true of all the terrestrial world lithospheres?
A) The lithosphere is broken into a set of large plates that float upon the softer rock below. B) Rock in the lithosphere is stronger than rock beneath it. C) The lithosphere extends from somewhere in the mantle all the way to the surface. D) The thickness of the lithosphere depends on interior temperature, with cooler interiors leading to thicker lithospheres.
If M = 1.1 kg, what is the tension in string 1?
a.
54 N
b.
47 N
c.
40 N
d.
62 N
e.
57 N