On
sc. s.e.5.5
one physical property of a star is apparent magnitude. which of the following
determining the apparent magnitude of a star?
a. the constellation the star is in
b. the distance the star is from earth
c. the number of times the star rotates
d. the number of prominences the star makes

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.