A wave on a string is described by D (x comma t )space equals space 2.0 space c m space sin (straight pi (12.57 straight x minus 638 straight t ))spacewhere x is in m and t is in s. The linear density of the string is 5.00 g/m. (a) What is the time period of oscillation of a point on the string in seconds

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Idon’t quite understand this problem