Two forces are the only forces acting on a 3.0-kg object which moves with an acceleration of 3.0 m/s2 in the positive y direction. If one of the forces acts in the positive x direction and has a magnitude of 8.0 N, what is the magnitude of the other force?
a.
12 N
b.
14 N
c.
16 N
d.
18 N
e.
22 N
a
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The decibel scale is:
a. linear: Three decibels minus two decibels equals one decibel. b. proportional: Three decibels is the square of two decibels, and four decibels is the square of three decibels. c. logarithmic: Two decibels is ten times one decibel; three decibels is ten times two decibels. d. inverse: A two decibel sound is half as loud as a one decibel sound. e. logarithmic by tens: Ten decibels is ten times one decibel; twenty decibels is one hundred times ten decibels.
If a planet is seeing its Moon in the New Phase right now, in what phase would the planetappear to be when viewed from its Moon?
a) Third Quarter Planet b) Full Planet c) New Planet d) You can't see the planet from its Moon e) First Quarter Planet
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the wavelength of the scattered photon?
A) 0.380 nm B) 0 nm C) 0.550 nm D) 0.591 nm E) 0.595 nm
A copper sphere, 10 cm in diameter, is subjected to a pressure of 1.0 × 106 N/m2. What is the change in the diameter of the sphere? The bulk modulus for copper is 1.4 × 1010 N/m2
A) 2.2 × 10-6 m B) 2.2 × 10-7 m C) 7.1 × 10-6 m D) 7.1 × 10-7 m E) 7.1 × 10-8 m