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A 196 g sample of a substance is heated to 321°C and then plunged into a 98 g aluminum calorimeter cup containing 129 g of water and a 19 g glass thermometer at 12.7°C. The final temperature is 35.1°C. What is the specific heat of the substance?
The resistance of a bagel toaster is 18 . To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster
a woman walks 250m in the direction 300 east of north then 175m directly east. find a the magnitude and b the angle of
The sound intensity level at a rock concert is 114 dB, while that at a jazz fest is 84.5 dB. Find the ratio of the sound intensity at the rock concert to that at the jazz fest
Obtain what energy is dissipated by a lightning bolt having a 18,000 Amp current, a voltage of 106 MV, and a time duration of 1.00 milliseconds
A particular wire has a diameter of 1.7 mm and length of 1.3 m. If its resistance is 15 meter-Ohms, what is the resistivity of the metal from which it is made
An electron accelerated from rest through a voltage of 520 V enters a region of constant magnetic field. If the electron follows a circular path with a radius of18 cm, what is the magnitude of the magnetic field?
A charge of -4.26 micro-Coulombs is fixed at the center of a compass. find direction of the net electrostatic force acting on the charge
a uniform electric field exists between two parallel plates separated by 2cm. if an electron of mass 9.1 e-31 kg is
A convex mirror has a focal length of magnitude 1 m. An object is 3.0 m in front of this mirror. Find the image distance and describe the image and magnification. A concave mirror has a focal length of 1 m. An object is placed 3.0 m in front of it..
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 475 kg. find the length of time the car could run before the flywheel would have to be brought back up to speed
A 1900 kg car traveling to the right at26 m/s is chasing a second car of the similar mass that is traveling to the right at 10 m/s. If the two cars collide and stick together, what is their speed now after the collision?
What fraction of ice is submerged when it floats in freshwater, given the density of water at a temperature of 0 degrees celcius is very close to 1000 kilograms/meter cubed
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