Which of the following correctly describes the meridian in your sky?
A) a half-circle extending from your horizon due east, through your zenith, to your horizon due west
B) a half-circle extending from your horizon due north, through your zenith, to your horizon due south
C) a half-circle extending from your horizon due east, through the north celestial pole, to your horizon due west
D) the point directly over your head
E) the boundary between the portion of the celestial sphere you can see at any moment and the portion that you cannot see
B
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A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 40.0 degrees above the horizontal. What is the time it takes the projectile to reach maximum height?
A. 2.66 s B. 2.23 s C. 1.97 s D. 1.54 s E. 1.02 s
What will the Sun's approximate luminosity be during the subgiant stage?
What will be an ideal response?
Three coplanar parallel straight wires carry equal currents I to the right as shown below. The current in the upper two wires is directed to the right, but the current in the bottom wire is directed to the left. Each pair of wires is a distance a apart. The direction of the magnetic force on the middle wire
A. is up out of the plane of the wires. B. is down into the plane of the wires. C. is in the plane of the wires, directed upwards. D. is in the plane of the wires, directed downwards E. cannot be defined, because there is no magnetic force on the middle wire.
Nova explosions involve a binary system of a white dwarf and a companion star and can occur in the same system repeatedly.
Answer the following statement true (T) or false (F)