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Aluminum has a density of 2700 kg/m^3. What is the resistance of an aluminum wire 0.12 cm in diameter and 80 m long? What is the mass of the wire? What is the mass of a copper wire, of density 8900 kg/m^3, with the same length and same total resistance?
a box sits on a horizontal wooden board. the coefficient of static friction between the box and the board is 0.25. you grab one end of the board and lift it up, keeping the other end of the board on the ground. what is the angle between the board ..
An ac generator with a frequency of 1.34 kHz and an rms voltage of 24.2V is connected in series with a 2.00 kohm resistor and a 315 mH inductor. What is the power factor for this circuit? What is the average power consumed by this circuit?
A luge and its rider, with a total mass of 90 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 38 m/s. If a force slows them to a stop at a constant rate of 1.4 m/s2.
projectile is launched with an initial speed of 40.0 m/s at an angle of 20.0° above the horizontal. What is the projectile's velocity at the highest point of its trajectory
A conducting spherical shell of radius Ri has a net charge Q on it. Using Gauss's law, find the electric field between the two shells
An occupant of a car has a chance of surviving a crash if the deceleration all through the crash is not more than 30.00 g. Approximation the force on a 72 kg person decelerating at this rate.
A father and a daughter balance a teeter totter
a patient has a far point of 29.2 cm and a near point of 24.2 cm. what power in diopters should be prescribed to
q1. a sling-thrower puts a stone 0.250 kg in the slings pouch 0.010 kg and then begins to make the stone and pouch move
How many 95W light bulbs can you use in a 120V circuit without tripping a 17A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each light bulb is V.)
what is the combined mass of the dog and basket.
You are moving into an apartment and take the elevator to the 6th floor. How much work does the elevator do on you alone (without belongings) on the downward trip, which is also made at a constant velocity
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