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A piece of nichrome wire is embedded into a 1-kg block of ice at -10°C. A current of 3.0 amperes and a voltage of 12 volts is maintained in the wire. How long will it take to separate the wire from the ice?
a transformer has N^1 =350 turns and N^2 =2000 turns. If the input voltage is 170V, what voltage is developed across the secondary coil?
A magnetic field is oriented at an angle = 60 degrees to the normal of a rectangular area. what is the area of a rectangle
The block of mass M slides back along the horizontal surface with a coefficient of kinetic friction ?k and eventually comes to a rest. calculate the total trip time from bullet impact to now
A molecule of DNA (deoxyribonucleic acid) is 2.05 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
Each of the three helicopter rotor blades is 5.20 mlong and has a mass of 280 kg. What is the kinetic energy of rotation
Three light bulbs each with a resistance of 50W, are connected in series to a 100 V power supply. What is the current flowing through the third light bulb.
a 1.15 kilo ohm resistor and a 1.2 nanof capacitor are connected in series to a 1250 hz generator with an rms voltage
Calculate the cenrtripetal acceleration of the Earth in itsorbit around the Sun, and the net force exerted on the Earth. What exerts this force on the Earth
a block of mass 0.2kg is moving with a speed of 5ms on a horizontal surface enters a rough patch ranging from x0.1m to
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A transformer operating from 79 V (rms supplies a 18.3 V lighting system for a garden. Find the equivalent resistance of the system
Water flowing through a garden hose of diameter2.70cm fills a20.0-L bucket in1.30min. what is the speed of the water leaving the nozzle
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