In the design of an optical fibre, what type of material is most suitable for the
design of the core?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?