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A 2.50 meter long copper wire has a mass of 0.25 kilograms. A magnetic field of 0.15 Teslas is oriented horizontally from south to north. What is the minimum current in the rod that would allow it to "float" in this magnetic field? What is the direction of the current in the wire?
What mass of water at 25.0° C added to a Styrofoam cup containing two 60.0-g ice cubes from a freezer at -17.0° C will result in a final temperature of 5.0°C for the drink?
A 40.0 N force is applied to a 46.0 cm long torque wrench. What is the net torque applied to the nut, what is the bolt%u2019s moment of inertia
a wire 1.80 m long carries a current of 13.0 a and makes an angle of 35.0 degrees with a uniform magnetic field of
A 743 pF capacitor is charged to 130 V and then quickly connected across a 172 mH inductor.What is the resulting frequency of oscillation
A cylinder made of insulating material has a uniform volume charge density. The cylinder is 20m in length and a radius 0.2m. The total charge on the cylinder is 4nC. Half way down the cylinder's length, what is the electric field outside the cylinder..
The venturi flowmeter shown in the figure is used to measure the flow rate of water in a solar collector system. The flowmeter is inserted in a pipe with diameter 1.9 {rm cm}; at the venturi of flowmeter the diameter is reduced to 0.64 {rm cm}. Th..
A concrete slab is 10.9 cm thick and has an area of 5.1 m2. Find what minimum power must be supplied to the coils to maintain a temperature difference of 20.0°C between the bottom of the slab and its surface
TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, What is the frequency for channel 4
the mass of the planet neptune is 4.5x10power 26 kg . itsradius of orbit around the sun is 4.5x10power12m. calculate the potential energy of neptune
A particle has a de Broglie wavelength of 3.20 × 10-10 m. Then its kinetic energy doubles. What is the particle's new de Broglie wavelength
If light is measured traveling through some medium at 0.90c, where c represents the speed of light in a vacuum, what is the index of refraction of the medium
A charged particle moves in a uniform magnetic field of 0.727 T with a period of 8.57 × 10-6 s. Find its charge-to-mass ratio
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