An ideal pendulum is often discussed when studying simple harmonic motion.

what are the conditions needed for an ideal pendulum? check all that apply.

1gravitational force acts to pull the pendulum’s mass down.
2the mass of the rod of the pendulum is evenly distributed along the rod.
3the pivot on which the pendulum swings is frictionless.
4the pendulum swings through its equilibrium position as a result of inertia.
5tension acts downward on the pendulum’s mass

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

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?

What sort of waves exhibit the doppler effect?