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The energy content of a certain food is to be determined in a bomb calorimeter that contains 3 kg of water by burning a 2-g sample of it in the presence of 100 g of air in the reaction chamber. If the water temperature rises by 3.2°C when equilibrium is established, determine the energy content of the food, in kJ/kg, by neglecting the thermal energy stored in the reaction chamber and the energy supplied by the mixer. What is a rough estimate of the error involved in neglecting the thermal energy stored in the reaction chamber?
A spherical mirror is polished on both sides. when you use aconvex mirror the magnification is +1/6. What is the magnificationwhen used as a concave mirror the object remaining the samedistance form the mirror?
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.8 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other word..
A 2 Kg block is suspended 5 m above the ground by a light rope wrapped around a 3 kg solid pulley wheel, as shown in figure below. The pulley wheel, which was initially at rest, is then released allowing it to rotate freely, letting the block fall..
Suppose that on earth you can throw a ball vertically upward a distance of 1.02 m. how high could you throw a ball on Pluto
When the Voyager I and Voyager II spacecraft were exploring the outer planets, NASA flight controllers had to plan the crafts' moves well in advance.How many seconds elapse between the time a command is sent from Earth and the time the command is ..
A source emits sound wavesof frequency 200 Hz, which move through still air at 340 m/s. Find the frequency heard by the listener
The Big Bang Theory suggests leftover background radiation. Find the wavelength of this radiation
you are designing a diving bell to withstand the pressure of seawater at a depth of 350 m .part a what is the gauge
A single square loop of wire 21.8 cm on a side is placed with its face parallel to the magnetic field between the pole pieces of a large magnet. When 6.27 A flows in the coil, the torque on it is 0.325 m·N. What is the magnetic field strength?
A pair of narrow, parallel slits separated with 0.270 mm is illuminated by the green component from a mercury vapor lamp (λ = 546.1 nm). The interference pattern is observed on a screen 1.23 m from the plane of the parallel slits.
Because it has the highest binding energy per nuclion of all nuclides, 62 over 32 Ni may be described as the most strongly bound. Its neutral atomic mass is 61.928349amu.
If a curve with a radius of 85 is perfectly banked for a car traveling 71 , what should be the coefficient of static friction for a car not to skid when traveling at 86.
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