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a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C determine the final temperature of the system consisting of the ice, water, and calorimeter. Remember that the ice must first warm to 0C, melt, then continue warming as water.
A square loop has sides 12 cm long and is wound with 50 turns of wire carrying 250 mA of current. what torque does the loop experience
A car has its 0.45m long radio antenna oriented vertically upward and is traveling at highway speeds of 70 mph. Calculate the range of induced emf on the antenna
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.4. find the resulting angular speed of the student and the stool
A large tank opens to the air full of water has a small hole in it 2.0 m from the top. How fast is the water shooting horizontally of the hole
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. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
A swimmer dived off a cliff with a running horizontal leap. What must his minimum speed be just as he leaves the top of the cliff
A ladder of length L = 2.5 m and mass m = 15 kg rests on a floor with coefficient of static friction ?s = 0.57. Assume the wall is frictionless. What is the normal force the floor exerts on the ladder
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
A basketball rolls without slipping down an incline of angle?. The coefficient of static friction is?s. Model the ball as a thin spherical shell. Find the acceleration of the center of mass of the ball
A fisherman's scale stretches 4.0cm when a 2.3kg fish hangs from it. What is the spring stiffness constant
The coeficient of friction on a horizontal cicular track, radius 0.25 km, is 0.7. How fast can a car go around skidding out
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of West. find the velocity of the boat with respect to the ground
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