A Concave makeup mirror is designed so that a person 25.0
rem in front of it sees an upright image at a distance of 50.0 cm
behind the mirror.
What is the radius ok curvature of the mirror? What is the
magnification of the image? is the image real or virtual?

With these questions , 15 pts & brainliest

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr