At what altitude and in what direction in your sky does the north or south celestial pole appear?
What will be an ideal response?
Answers will vary with your latitude; latitude = altitude of NCP (or SCP in Southern Hemisphere).
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If one star has a temperature of 4000 K and another star has a temperature of 40,000 K, how much more energy per second will the hotter star radiate from each square meter of its surface? ____________________
Fill in the blank(s) with correct word
A wire in the plane of the paper carries a current clockwise through a loop. A magnetic field points out of the page. In what direction is a force being exerted by the magnetic field at the rightmost point on the loop?
1.leftward 2.into the page 3.toward the bottom of the page 4.out of the page
A ball is rolled horizontally off a table with an initial speed of 0.24 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.36 s. What is the height of the table? (g = 9.8 m/s2 and air resistance is negligible)
a. 0.72 m b. 0.55 m c. 0.016 m d. 0.64 m e. 0.65 m
Consider Newton's second law states, often written as force = mass × acceleration. Based on this law, what property can you determine if you observe the acceleration of an object with a known mass?
A) the net force acting on the object B) the strength of gravity acting on the object C) the current velocity of the object D) the current location of the object