Reni has made a pendulum by tying a stone to a string. Its time period is 0.5s. Can you help Reni to redesign her pendulum with a time period of 1 second? (i) How will you help her to achieve this? (ii) State the factor on which the time period of a pendulum depends so that Reni can redesign her pendulum

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Mga halaman/punong ornamental na di namumulaklak

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone