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A galvanometer has an internal resistance of 31 Ω and deflects full scale for a 45-mA current.
a) Find the value of this resistor which makes an ammeter read currents up to 40 A?
b) Determine the value of this resistor which makes a voltmeter give a full scale deflection of 300V?
A ball traveling with an initial momentum of 3.5 kg•m/s bounces off a wall and comes back in the opposite direction with a momentum of -3.5 kg•m/s
A square coil, enclosing an area with sides 4.6 cm long, is wrapped with 3,149 turns of wire. What average voltage is induced in the coil
An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. What was the vertical component of its velocity just before striking the ground
Suppose you put five electrons into a 0.30nm -wide one-dimensional rigid box (i.e., an infinite potential well). What is the ground-state energy
A brick weighing 30 N falls from a height of 15 m and sinks 0.7 m into the ground. What is the average force on the rock due to the ground as it sinks into the ground
Barometric pressure in the eye of a hurricane is 0.91atm (27.2 in of mercury). How does the level of the ocean surface under the eye compare with the level under the distant fair-weather region where the pressure is 1.0atm.
A uniform cylinder of mass m=8.26 kg and radius R=0.147 m is released from rest on an inclined plane (theta=42.4 deg), What is the magnitude of the angular velocity just before the cylinder reaches the horizontal surface
A radio transmitter creates a time-dependent currentI(t)=I0sin ωt in the radio antenna, whereI0=20A and ω=6.3e6 persecond (corresponding to about the middle of the AM band). what is the average powerradiated by this antenna if it is 160m long?
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.00 s, how many revolutions does the tub turn while it is in motion
A 2 kilogram stone is tied to a thin, light wire wrapped around the outer edge of the uniform 10 kilogram cylindrical pulley. Determine the acceleration of the stone, the tension in the wire, and the angular acceleration of the pulley
The property of objects to resist changes in motion is called inertia. If an object has a mass of m = 41.85 kg, how do we quantify the inertia this object
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
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