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A building having a steel infrastructure is 5.94 102 m high on a day when the temperature is 0.00 °C. How much taller is the building on a day when the temperature is 45.8 °C? The linear expansion coefficient of steel is 1.30 10-5 °C?1.
A current of 13.9 A flows through an electric heater operating on 120 V. What is the heater's resistance
consider a 500 kg dragster on a 200 m strip reaching the end of the strip in 5 seconds from a standing start. calculate the total amount of work done the engine on that 200 m trip
A variable-speed drill, initially turning at 250 rpm, speeds up to 1300 rpm in a time interval of 0.1 s. What is its average rotational acceleration
A coil has a DC resistance of 100 Ω and an impedance of 180 Ω at a frequency of 2 kHz. What is the inducatance of the coil
Two forces, F1 vector and F2 vector, act at a point. F1 vector has a magnitude of 8.40N and is directed at an angle of 65.0 degrees above the negative x axis in the second quadrant. What is the magnitude of the resultant force
What must the charge (sign and magnitude) of a 1.43 g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630.
An empty hollow metal sphere has a potential of +170 V with respect to ground (defined to be at V = 0) and has a charge of 1.1 10-9 C
Theoretically where on a rollercoaster should you feel the heaviest? Use the concept of inertia. Where do you actually feel the heaviest
A transverse wave on a string is described by the wave functionA transverse wave on a string is described by the wave function y=(0.120m)sin((pi*x)/8 +4*pi*t). Determine the transverse speed and acceleration
A 200 g calorimeter contain 500 g of water at 21 degree Celsius. A 100g of ice at -20 degree Celsius is placed into the calorimeter. find the specific heat of the material of the calorimeter
what is the electric potential energy of this particle. what is its speed just before it strikes the positive plate.
A house has a floor area of 113 m2 and an outside wall that has an area of 26 m2. The earth's magnetic field here has a horizontal component of 3.0 multiplied by 10-5 T that points due north and the vertical component of 4.9 multiplied by 10-5 T p..
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