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The complete combustion of 0.501 g of a snack bar in a calorimeter (Ccal = 6.15 kJ/°C) raises the temperature of the calorimeter by 1.85 °C. Calculate the food value (in Cal/g) for the snack bar.
A 64-kg runner rounds a circular track of radius 63.7 m at a constant 5.30 m/s. Find the magnitude of her momentum changes after she has gone one-fourth of the circle
A tube with a 3.0-mm radius has ions flowing through it along its length. To determine the rate at which the charge is being moved through the tube, what is the magnitude of the current flowing through the tube
A 330-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 34° with the horizontal
Under the influence of its drive force, a snowmobile is movingat a constant velocity along a horizontal patch of snow. When thedrive force is shut off, the snowmobile coasts to a halt.
An electron has a de Broglie wavelength ? = 7.0×10?10m, What voltage was needed to accelerate it to this speed and What is its speed
A 32 kilogram block slides with an initial speed of 10 m/s up a ramp inclined atan angle of 25 degree with the horizontal. obtain the distance along the incline that the block slides before coming to rest
The George Washington bridge, that spans the Hudson River between New York and Jersey, is 4670 feet long and is made out of steel, How much does it expand in length between winter and summer.
What is the radius of a hydrogen-filled balloon that would carry a load of 3700 N (in addition to the weight of the hydrogen) when the density of air is 1.29 kg/m3
A wheel is disconnected from a motor and come to rest from 14,000 rpm because of a 0.90 m·N frictional torque. How many revolutions has the wheel turned before coming to rest
An object of mass 3.02 kg, moving with an initial velocity of 4.95 J m/s, collides with and sticks to an object of mass 2.67 kg, Find the final velocity of the composite object
assuming the diameter of a penny is 2.00 cm and its mass is 2.60g what is the minimum air speed needed to lift the
A ball on the end of a string is revolved at a uniform rate in a vertical circle of a radius 72.0 centimeter. Find the tension in the string when the ball is at the bottom of its path
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