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Gravity
Terms in this set (25)
Kinetic energy
energy of motion
potential energy
stored energy
Temperature
A measure of the average energy of motion of the particles of a substance.
Heat
thermal energy in transfer from one body of matter to another
Convection
The transfer of heat by the movement of a fluid or gas
Conduction
The direct transfer of heat from one substance to another substance that it is touching.
Radiation
The transfer of energy by electromagnetic waves
electromagnetic spectrum
All of the frequencies or wavelengths of electromagnetic radiation
Amplitude
Height of a wave
Frequency
the number of complete wavelengths that pass a point in a given time
Wavelength
Horizontal distance between the crests or between the troughs of two adjacent waves
greenhouse effect
Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases
transverse wave
A wave that moves the medium in a direction perpendicular to the direction in which the wave travels
longitudinal wave
a wave in which the particles of the medium vibrate parallel to the direction of wave motion
Trough of a wave
Lowest point of a wave
crest of a wave
Highest point of a wave
thermal energy
The total energy of motion in the particles of a substance
mechanical energy
the energy associated with the motion and position of everyday objects
solar energy
energy from the sun
chemical energy
potential energy stored in chemical bonds
electrical energy
Energy caused by the movement of electrons.
nuclear energy
The potential energy stored in the nucleus of an atom
geothermal energy
Energy from steam or hot water produced from hot or molten underground rocks.
light energy
Energy produced by the vibrations of photons
sound energy
Energy caused by an object's vibrations
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Verified questions
ENGINEERING
A steam-generating unit heats saturated liquid water at constant pressure of 800 kPa in a piston/ cylinder device. If 1.5 kW of power is added by heat transfer, find the rate (kg/s) at which saturated vapor is made.
ENGINEERING
A square $(10 \mathrm{mm} \times 10 \mathrm{mm})$ silicon chip is insulated on one side and cooled on the opposite side by atmospheric air in parallel flow at $u_{\infty}=20 \mathrm{m} / \mathrm{s}$ and $T_{\infty}=24^{\circ} \mathrm{C}$. When in use, electrical power dissipation within the chip maintains a uniform heat flux at the cooled surface. If the chip temperature may not exceed $80^{\circ} \mathrm{C}$ at any point on its surface, what is the maximum allowable power? What is the maximum allowable power if the chip is flush mounted in a substrate that provides for an unheated starting length of 20 mm?
ENGINEERING
The input signal to a unity-gain third-order high-pass Butterworth filter is a half-wave rectified sinusoidal voltage. The corner frequency of the filter is 2500 rad/s. The amplitude of the sinusoidal voltage is 270π V and its period is 400π μs.Write the first three terms of the Fourier series that represents the steadystate output voltage of the filter.
ENGINEERING
Consider an egg being cooked in boiling water in a pan. Would you model the heat transfer to the egg as one-, two-, or three-dimensional? Would the heat transfer be steady or transient? Also, which coordinate system would you use to solve this problem, and where would you place the origin? Explain.
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