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A 38g glass thermometer reads 20.7C before it is placed in 122mL of water. When the water and thermometer come to equilibrium, the thermometer reads 42.2C. What was the original temperature of the water?
a single-turn square loop of side l is centered on the axis of a long solenoid. in addition the plane of the square
The Corvettte engine has a power output of 435hp. Its thermal efficiency is 27%. How much heat must be supplied to the engine per second
a long straight metal rod has a radius of 5.00 cm and a charge per unit length of 34.0 ncm. find the electric field at
The springs of a 1200 kg car compress 5.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations
A woman starts to swim directly across a 6.8-km-wide river. Her speed with respect to the water is 1.7 m/s. How much time does it take her to cross the river
A car traveling at a speed of 18 m/s crashes into a solid concrete wall. The driver has a mass of 90 kg. What is the change in momentum of the driver as he comes to a stop
An object of mass m moves in one dimension under the influence of the following conservative potential function: U(x) = x2 + 2x - 1. Determine the acceleration of the object
A concave makeup mirror is designed so that a person 28 cm in front of it sees an upright image magnified by a factor of two. What is the radius of curvature of themirror?
The smallest insects that a bat can detect are approximately the size of one wavelength of the sound the bat makes. What is the minimum frequency of sound waves needed for the bat to detect an insect that is 0.53 cm long? (Assume the speed of soun..
an electron is released a short distance above the surface of the earth. a second electron directly below it exerts an
The pilot of an aircraft wishes to fly due west in a 30.8 km/h wind blowing toward the south. In what direction should the aircraft head
A liquid is flowing through a horizontal pipe whose radius is 0.0186 m. What volume flow rate will keep the pressures in the two horizontal pipes
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