Apiano wire with mass 3.00 g and length 80.0 cm is stretched with a tension of 25.0 n. a wave with frequency 120.0 hz and amplitude 1.6 mm travels along the wire.
(a) calculate the average power carried by the wave.
(b) what happens to the average power if the wave amplitude is halved.

What is the length x of the side of the triangle below? (hint: use the cosine function)

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which of the following best describes the circuit shown below?