The equation of motion of a particle undergoing simple harmonic motion in the y direction is y = (2.0 cm) sin(0.60 s-1 t)
At time t = 0.60 s determine the particle's (a) position, (b) velocity, and (c) acceleration.
(a) 0.70 cm (b) 1.1 cm/s (c) -0.25 cm/s2
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Why are star clusters almost ideal "laboratories" for stellar studies?
A) All stars in the cluster are the same size and luminosity. B) Their combined light makes them much easier to spot from a distance. C) Stars in clusters have the same age, similar composition, and are at the same distance away. D) Stars in clusters are all relatively young and therefore shine brightly. E) Like our Sun, stars in clusters are always located in the plane of the Milky Way Galaxy.
A uniform rod is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest at the horizontal position. What is the angular acceleration of the rod at the instant the rod makes an angle of 70° with the horizontal?
a. 3.7 rad/s2 b. 1.3 rad/s2 c. 2.5 rad/s2 d. 4.9 rad/s2 e. 1.9 rad/s2
The 105°W longitude meridian is the center of the ______________ Standard Time zone in the United States
a. Pacific b. Mountain c. Eastern d. Central
A nucleon is
A) a neutron or a proton. B) a nucleus made of neutrons only. C) a neutron or proton when in the nucleus. D) a neutron, proton, or positron when in the nucleus. E) a neutron or positron when in the nucleus.