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A cube of ice is taken from the freezer at -9.5?Cand placed in a 95-g aluminum calorimeter filled with 310g of water at room temperature of20.0 ?C. The final situation is observed to be all water at 15.0?C. The specific heat of ice is2100 J/kg?C?, the specific heat of aluminum is900 J/kg?C?, the specific heat of water is is4186 J/kg?C?, the heat of fusion of water is333 kJ/Kg. What was the mass of the ice cube?
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
A cylindrical aluminum pipe of length 1.43 m has an inner radius of 2.00 10-3 m and an outer radius of 3.00 10-3 m. What is the resistance of this unit
On a certain amusement park ride, passengers are seated in a horizontal circle of radius 7.5m. the seats begin to rotate from rest and are uniformly accelerated for 21 seconds to a most rotational speeds of 1.4 rad/s.
A source emits sound uniformly in all directions. A radial line is drawn from this source. On this line, determine the radial positions of two points, 0.786m apart, such that intensity level at one point is 1.72 dB greater than that at the other.
You buy an ice cream cone. The cone you are given is filled with melted ice cream of density 1.2g/cm^3. Find the pressure at the bottom of the cone
A Carnot air conditioner takes energy from the thermal energy of a room at 294 k and transfers it as heat to the outdoors, which is at 309 k. for eacg joule of electric energy needed to operate the air conditioner, how many joules are removed from..
A simple pendulum with mass m = 1.5 kg and length L = 2.41 m hangs from the ceiling, What is the magnitude of the radial acceleration as the pendulum passes through the equilibrium point
Two adjacent sources each emit a frequency of 800Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved as a result an observer in front of the sources would hear no sound.
A 15 pF capacitor is charged to 1 kV and then removed from the battery and connected in parallel to an uncharged 65 pF capacitor
A projectile is shot from the edge of a cliff 140 m above ground level with an initial speed of 100 m/s at an angle of 37 degrees with the horizontal. Find out the time taken by the projectile to hit point at ground level.
Two objects with masses 5.60 kg and 1.40 kg hang 0.500 m above the floor from the ends of a cord 6.80m long passing over a frictionless pulley. Both objects start from rest. Find the maximum height reached by the 1.40kg object.
at what range of speeds can a car safely make the curve.
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