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A wire 3.00 m long and 0.450 mm2 in cross-sectionalarea has a resistance of 38 at 20°C. If its resistance increasesto 38.3 at 28.0°C, what is the temperature coefficient of resistivity?
q1. a rectangular container measuring 23 cm 52 cm 61 cm is filled with water. what is the mass of this volume of water
find out the change in electric potential energy. For lengths of 1.000 m, 0.750 m, and 0.500 m, total time.
A capacitor is connected across the terminals of an ac generator that has a frequency of 424 Hz and supplies a voltage of 26 V. Find the capacitance of the second capacitor
You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sam, with mass 78.0kg , What was the speed of each person before the collision
A 12-kg block initially slides at 18 m/s on a flat rough surface and eventually stops. what is the entropy change of the system
In an amusement park "Rocket" ride, cars are suspended from 4.25 m long cables attached to rotating arms at a distance of 6.00 m from the axis of rotation. What would the angular speed be if the angle of the "Rocket" cars were changed to 60o from v..
A room has dimensions 2.58 m (height) × 5.89 m × 6.33m. A fly starting at one corner flies around, ending up at thediagonally opposite corner. (a) What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length o..
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
An object is placed to the left of a convex lens and on the optical axis. calculate the magnification of the image formed by the lens
A stationary radar operator determines that a ship is 13km south of him. An hour later the same ship is 23km southeast. If the ship moved at constant speed and always in same direction, what was its velocity during this time? (Hint: Take the origi..
A standing wave on a string fixed at both ends has three antinodes. The string is 85.0 cm long. What is the wavelength of this standing wave
If a 35.0 N·m torque on a wheel causes angular acceleration 20.0 rad/s2, what is the wheel's rotational inertia
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