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you were to walk briefly in space without a spacesuit while far from the Sun (as an astronaut does in the movie 2001), you would feel the cold of space --while you radiated energy, you would absorb almost none from your environment. Assume that your emissivity is 0.90, the surface area of the average human body to be about 2 m2, and the skin temperature to be about 300 K.
(a) At what rate would you lose energy? (b) How much energy would you lose in 55 s?
Selection of motors for different Engg. application 1. For Cement industry: Various types of motors for pumps, fans, conveyors ,crushers, kilns an mills Major mill
What are "Overtones" and "Harmonics" ? How are they build in an open pipe? Derive the mathematical equations for the frequencies of the harmonics produced in an open pipe.
Q. What are the affect does electricity have on the soil? Answer:- Electrical current and ions are able to cause certain molecules (and moisture) to adhere to soil. Large
Evaluate the tension in the rope A muscle builder holds the ends of a masslessrope. At the center of the rope, a 15kg ball is hung. What is the tension in the rope if the angl
The ordered arrangements of radiations according to wavelengths or frequencies are called as Spectrum. Spectrum may be divide in two parts Emission spectrum and Absorption spectrum
explain the pitch of sound and also explain is the ghosts come in the category of matter? is the sound is the form of wave? explain sound,intensity,types,loudness of sound, quality
Kelvin : Kelvin is the fundamental unit of temperature. It has quantity of zero where the molecular activity of gases ceases. Mole : Mole is the fundamental unit of quantity of
Which has additional rotational kinetic energy an object with a rotational inertia of 4 kg·m 2 and an angular velocity of 8 rad/s or else an object with a rotational inertia of 8
Q. Illustrate what are the characteristics of dead stars? Answer:- Dead stars are typically cold balls of material in empty space. A teaspoonful of white dwarf substance w
The method by which the identity of a nucleus is changed when it is bombarded by an energetic particle is known as nuclear function. The general relation for the nuclear reaction i
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