On a position-versus-time graph, the slope of the straight line joining two points on the plotted curve that are separated in time by the interval ?t, is which of the following quantities?
a. average steepness
b. average velocity
c. instantaneous velocity
d. average acceleration
b
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The moment of inertia of a CO molecule is 1.46 × 10^?46 kg ? m2 . What is the wavelength of the photon emitted if a rotational transition occurs from the J = 3 to the J = 2 state?
a. 4.36 × 10^?4 m b. 8.71 × 10^?4 m c. 17.4 × 10^?3 m d. 5.53 × 10^?4 m e. 2.90 × 10^?4 m
For a beam of light, the direction of polarization is defined as
A) the beam's direction of travel. B) the direction of the electric field's vibration. C) the direction of the magnetic field's vibration. D) the direction that is mutually perpendicular to the electric and magnetic field vectors.
Which of the following statements correctly describe the relationship between stars and constellations?
What will be an ideal response?
Jason weighs 150 N and sits on his big brother's shoulders. Big brother weighs 400 N. The support force supplied by the floor must be
A) 150 N. B) 400 N. C) 550 N. D) more than 550 N.