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A spring has a spring constant of 578N/m. When used tosuspend an object in the air, the spring stretches by0.0640m. When used to suspend the same object in water, thestring stretches by 0.0520m
(a) What buoyant force acts onthe object?
(b) What is the volume of the part of the objectthat is under water?
A block of mass m = 2.70 kg slides down a 30.0° incline which is 3.60 m high. Determine how far back up the incline the smaller mass will go
An ac generator has a frequency of 7.4 kHz and a voltage of 41 V. When an inductor is connected between the terminals of this generator, What is the inductance of the inductor
q1. a boat crosses a river of width 115 m in which the current has a uniform speed of 1.39 ms. the pilot maintains a
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1200 Hz. What is the speed of the bird
a dc circuit has a single battery of voltage v 10.0 v attached to a resistor r 100 ohms. if the voltage is increased
A silicon solar cell looks like a battery with a 0.33Vterminal voltage. What is the solar cell's efficiency-that is, what percentage of the energy incident on the cell is converted to electric energy
A 2000 kg car is traveling around a flat curve with a radius of 20 m. If the maximum frictional force is 10,000 N, then what is the fastest speed that the car can travel around the curve
The track is 400 meters lonf and linear. Car A accelerates at 3 meters per second and Car B accelerates at 3.1 meters per second. How far behind is Car A when Car B passes the finish line
Calculate the magnitude of the electric field at the origin due to the following distribution of charges: -q at (x,y) = (a,a), +q at (a,-a), +q at (-a,-a) and -q at (-a,a)
A vessel whose walls are thermally insulated contains 2.5 {rm kg} of water and 0.6 {rm kg} of ice, all at a temperature of 0.0 ^circ {rm{C}}. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted ..
Two identical objects each hold a net charge of q = 9e. If the gravitational force between the two objects exactly cancels the electrostatic force between the objects, what is the mass of each object
Two coils are at fixed locations. When the current in coil 2 increases at a rate of 15 A/s, the emf in coil 1 is 25 mV. Find their mutual inductance
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