Star A is at 2pc and has an apparent magnitude of 4. Star C is at 50 pc and has an apparent magnitude of 2. Which of the most intrinsically bright star? A.
Star A because it is closest to the moon
B.
Star B because the apparent magnitude is a larger number than A and C
C.
Star C because it’s absolute magnitude will have the smallest value campsites to A and B
D.
Star A and C have the same intrinsic brightness because they appear equally bright

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.