A(n) signal carries information by copying an original sound.

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.