An object with mass 3.5 kg is attached to a spring with spring stiffness constant k = 270 n/m and is executing simple harmonic motion. when the object is 0.020 m from its equilibrium position, it is moving with a speed of 0.55 m/s.(a) calculate the amplitude of the m(b) calculate the maximum velocity attained by the object. [hint: use conservation of energy. m/s

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge