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A standard cell of 1.2V gives gives a balance point at 60.2cm and a dry cell gives a balance point at 83.2cm. Calculate the emf of the dry cell.
It will be shown later that the scale height, H, is proportional totemperature, T. For an average temperature of 255 K, the scaleheight is 7.5 km assuming an isothermal atmosphere
A 0.58-kg metal sphere oscillates at the end of a perpendicular spring. As the spring stretches from 0.13 to 0.26 m (relative to its unstrained length), the speed of the sphere decreases from 5.45 to 5.10 m/s. What is the spring constant of the sprin..
a 1.70 kg block and a spring with a force constant of 955 nm are oriented vertically as shown below. initially the
question air enters a hot-air furnace at 7degc and leaves at 77degc. if the pressure does not change each entering
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. What is the work done by the field on the electron
A cylinder contains a mixture of helium and argon gas inequilibrium at 160°C. (a) What is the average kinetic energy for each type of gas molecule?
How fast must you project an object for it to reach a height equal to the moon's distance from the earth? Ignore the gravitational attraction of the moon
Lightning strikes a solid iron flag pole which has a resistance of 2.0 x 10^-4 ohms. The potential difference between the top and bottom of the pole is 4.2 x 10^4 V. The electrons are flowing up the pole. What will be the magnitude and direction o..
The resistance of a bagel toaster is 18 . To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster
Determine the tension in each cable if boat has a mass of 490 kg and the angle of each cable is 50 degrees from the horizontal and the boat is being momentarily held at rest. Evaluate this to the tension when the boat is raised and held at rest so th..
A thin rod consists of two parts joined together. One-third of it is silver and two-thirds is gold. The temperature decreases by 31.3 C°. Determine the fractional decrease ?L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the init..
An undersea research chamber is spherical with an external diameter of 5.20 meter the mass of the chamber when occupied is 74,400 kilogram it is anchored to sea bottom by a cable: Find the buoyant force on the chamber
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