spring

A 69.3 kg person jumps from a window to a fire net 21.8 m below, which stretches the net 1.20 m. Assume that the net behaves like a simple spring, and calculate how much it would stretch if the same person were lying in it.

Determining the type of interference from the given situation.

A person stands between two speakers driven by the same source. Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other. What type of interference does the person sense? a: constructive b: destructive c: both constructive and destructive d: neither constructive nor destructive.

Moment of Inertia of a thin uniform rod by integration

A thin, uniform rod has length L and mass M. a. Find by integration its moment of inertia about an axis perpendicular to the rod at one end. b. Find by integration its moment of inertia about an axis perpencicular to the rod at its center of mass.

True and false questions about sound wave, frequency and intensity.

Consider two sources of sound, each of which emits a sound wave of the SAME frequency and the SAME intensity. The sources are located on a straight road, relatively close to each other. You (the listener) are also located on the same road, about 1/4 mile away. All 3 objects (source A, source B and you) are in a straight line. Which of the following statements are true? (Give ALL correct answers) A) For beats to occur, the sound waves from the two sources must have different intensities B) If you hear an intensity level of 10 dB from one source alone, then the two sources combined will give a level of less than 20 dB C) If one source is moving away from you, the frequency of its e... click for more

True and false questions about a stretched string and standing waves.

A string of length L is stretched horizontally between two fixed points. When the string is plucked vertically, standing waves can be formed on the string. Which of the following statements are true about this situation? (Give ALL correct answers) A) It is possible for half a wavelength to fill the length of the string B) The middle of the string can never be a node or an antinode C) The lowest resonant frequency is called the fundamental D) Each end of the string must be a node E) The waves on the string are transverse waves