Answer:
The answer is D.
Explanation:
They vibrate parallel to the wave.
During the propagation of a sound wave in air, the vibrations of the particles are most accurately represented as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium occurs in a direction that is parallel to the direction of energy transmission.
Solids are better conductors of heat than liquids.
Reason - They are tight bonded which can get electrons or which ever thru those bonded atoms in this case the solid, faster and their position are less fixed.
A wooden log is displaced to a distance of 20m in 10 seconds by applying 500N effort . Calculate the workdone and power...
Solution,
displacement = 20 m
time = 10 sec
force = 500 N
work done = ?
power = ?
Now ,
work done = f × s
= 500 N × 20 m
= 10000 j
Now ,
~nightmare 5474~
Answer:
a fluorine atom has 9 protons and 9 electrons, so it is electrically neutral. If a fluorine atom gains an electron it will become a fluoride ion with an electric charge of -1
To find the value of the energy of one photon of electromagnetic radiation, we use the equation,
Here, E is the energy of photon , is the frequency of the light , c is the speed of light and its value of , is the wavelength of the electromagnetic radiation and h is plank constant and its value of .
Given .
Substituting the values in above equation, we get
Thus, the energy of one photon of electromagnetic radiation is .