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Two metal rods of equal length-one aluminum, the other stainless steel-are connected in parallel with a temperature of 10oC at one end and 122oC at the other end. Both rods have a circular cross section with a diameter of 6 centimeter. Compute the length the rods must have if the combined rate of heat flow through them is to be 32.5 Joule per second.
A stone of weight W has specific gravity 2.51. When the stone is suspended from a scale and submerged in water, what is the scale reading in terms of its weight in air
A 2.0-kg rock initially at rest loses 407 J of potential energy while falling to the ground. Compute the kinetic energy that the rock gains while falling. What is the rock’s speed just before it strikes the ground?
a 46-cm-long wire with a mass of 10.4 g is under a tension of 52.5 n. both ends of the wire are held rigidly while it
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate should be.
Take element Z = 21 from the periodic table. Ionize it 20 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
You have a 1.91-m-long stretched string with a mass of 19.3 g. When you oscillate the string at 440 Hz, obtain the tension in the string
A neutron decays into a proton, an electron, and an anti-neutrino. Why can we state that the charge of the anti-neutrino must be zero?
the total electric flux from a cubical box 3.00cm on a side is 1.40times103ncdot m2c. what charge is enclosed by the
a 6.10times10-2kg cube of ice at an initial temperature of -18.0 c is placed in 0.880kg of water at 41.0 c in an
An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the air is 30, what is the angle of refraction into the carbon tetrachloride?
A particular wire has a resistivity of 2.7 ? 10-8 ·m and a cross-sectional area of 4.1 ? 10-6 m2. What length of wire is required
a 240 g piece of ice at 0degc is placed in 510 g of water at 23degc. the system is in a container of negligible heat
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