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An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 420-g sample of silver at an initial temperature of 90°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Calculate the mass of the aluminum cup.
find the combined mass of the dog and basket. chandelier with mass is attached to the ceiling of a large concert hall by two cables.
The dial on an AM radio contains numbers ranging from about 530 to about 1600. What is the corresponding range of wavelengths
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 5.90 m to a store. At what angle is the escalator inclined above the horizontal
One can not align the apparatus to eliminate entirely the effects of the Earth's magnetic field. calculate the component of the earth magnetic field perpendicular to the entering electron beam
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. What is her average speed for the round trip
With a particular grating a doublet of the two wavelengths 731.3 and 732.1 nm is viewed in the third order at 9.3° to the normal, find the grating spacing in nanometers
What is the magnitude of vertical component of its velocity as it strikes the ground.
A capacitor is consists of two short sections of parallel wires in air. One wire is found to be of the voltage of 58 V, What is the capacitance of the two wires
Spark plugs should be tightened to a specified torque of 9.28Nm. You have a wrench that is 0.39 m long, What force must you exert on the wrench
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
A rescue helicopter lifts a 85 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the person's weight
The weight of the car is 14 kN. You know three points on the plane, What is the force of friction (Ff=?).
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