The center of a large bar magnet is z = 25 cm from a thin plate of high resistance material 12 cm long, 2.5cm high, and 0.1 cm thick that is connected to a 240 V power supply whose internal resistance is negligible. The bar magnet is perpendicular to the plate. The mobility of charge canners in the thin plate is 3.8 x 10^(-4) (m/s)/(V/m), and the number density of singly charged charge carriers is 3.6 x 10^23 m^(-3). A voltmeter connected precisely vertically across the A thin plate and reads +1.2 x 10^(-5) V. A low-resistance ammeter is in series with the rest of the circuit.
(a) Are the charge carriers electrons or holes?
(b) What is the magnetic deplete moment of the maggots? Include unit. (Enter the magnitude.)
(c) What does the ammeter read, including sign?

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?