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A sample of lead has a mass of 40.00 kg and a density of 1.130 x10^4 kg/m3 at 0°C. (Assume the average linear expansion coefficient for lead is 2.900 x10^-5(°C-1).)
(a) What is the density of lead at 70.00°C? (Give your answer to four significant figures.)
(b) What is the mass of the sample of lead at 70.00°C?
The wind exerts a force of 325N north on a sailboat, while the water exerts a force of 425 N west on the sailboat. Find out the magnitude and direction of the net force on sailboat.
a bullet of mass 40 g travels at 1000m/sec. what wave length can we associate with it
A man has a mass of 80kg on the Earth's surface. How far above the surface of the earth would he have to go to "lose" 11% of his body weight
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Two forces act on a 24-kg object. One force has magnitude 65 N directed 59° clockwise from the positive x-axis, What is the magnitude of this object's acceleration
A block of wood with volume V floats in water with 0.70V submerged. In oil the block floats with 0.85V of its volume submerged. calculate the density of the wood and oil
Using the liquid drop model, plot on the same graph, as a function of A, in units of MeV/nucleon (a) the bulk or volume binding energy per nucleon, (b) the negative of the surface binding energy per nucleon,
A series circuit has a 50 Hz ac source, a 20 ohm resistor, a 0.6 H inductor, and a 40 ?F capacitor, the voltage amplitude of the source is closest to
assume a block of mass 25.0 kg rests on a horizontal plane, and the coefficient of static friction between the surfaces is 0.220. what is the actual static frictional force that acts on the block if an external force of 25.0 N acts horizontally on..
A solenoid 70 . 8 cm long has 640 turns and a radius of 2 . 34 cm. If it carries a current of 2 . 03 A, find the magnetic field along the axis at its center
A 100kg hollow sphere is neutrally buoyant and completely underwater. It's volume is 0.5 cubic meters. If this 0.5 cubic meter space is filled with a combination of helium and water, what fraction of this volume is helium?
An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth.
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