A pot of soup because metal is a better conductor of heat and it stores more heat as well. thermal energy is heat energy.
Answer : Yes, distance measurements based on the speed of light used for objects in space.
Explanation : A light year is measurement of distance that light travel in a one year.
In a one year light travels 9460000000000 kilometer.
We know that, speed of light is ![3\times10^{8}\ m/s](https://tex.z-dn.net/?f=3%5Ctimes10%5E%7B8%7D%5C%20m%2Fs)
and time is 31536000 seconds in 1 year
so, distance = speed of light X time
Now, the light year is ![9.4608\times10^{15} meter](https://tex.z-dn.net/?f=9.4608%5Ctimes10%5E%7B15%7D%20meter)
Example : The nearest star to earth is about 4.3 light year away.
Easy !
Take any musical instrument with strings ... a violin, a guitar, etc.
The length of the vibrating part of the strings doesn't change ...
it's the distance from the 'bridge' to the 'nut'.
Pluck any string. Then, slightly twist the tuning peg for that string,
and pluck the string again.
Twisting the peg only changed the string's tension; the length
couldn't change.
-- If you twisted the peg in the direction that made the string slightly
tighter, then your second pluck had a higher pitch than your first one.
-- If you twisted the peg in the direction that made the string slightly
looser, then your second pluck had a lower pitch than the first one.
Answer:
536 miles
Explanation:
If the airplane is running at a speed of 804 miles per hour, and covers a distance, x in a particular number of mile. The distance in mile can be gotten they the application of direct formula. Multiplying the speed by the time it took, and thus
804 mph * 40
Remember the time is in minutes and not hours, so, you convert it to hours.
804 * 40/60 hours =
536 miles
Answer:
2.13 x 10^-19 J or 0.53 eV
Explanation:
cut off wavelength, λo = 700 nm = 700 x 10^-9 m
λ = 400 nm = 400 x 10^-9 m
Use the energy equation
![E = \frac{h c}{\lambda _{o}}+K](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7Bh%20c%7D%7B%5Clambda%20_%7Bo%7D%7D%2BK)
Where, K be the work function
![\frac{h c}{\lambda} = \frac{h c}{\lambda _{o}}+K](https://tex.z-dn.net/?f=%5Cfrac%7Bh%20c%7D%7B%5Clambda%7D%20%3D%20%5Cfrac%7Bh%20c%7D%7B%5Clambda%20_%7Bo%7D%7D%2BK)
![K =hc\left ( \frac{1}{\lambda } -\frac{1}{\lambda _{0}}\right )](https://tex.z-dn.net/?f=K%20%3Dhc%5Cleft%20%28%20%5Cfrac%7B1%7D%7B%5Clambda%20%7D%20-%5Cfrac%7B1%7D%7B%5Clambda%20_%7B0%7D%7D%5Cright%20%29)
![K =6.63\times 10^{-34}\times 3\times 10^{8}\left ( \frac{1}{4\times 10^{-7} } -\frac{1}{7\times 10^{-7}}\right )](https://tex.z-dn.net/?f=K%20%3D6.63%5Ctimes%2010%5E%7B-34%7D%5Ctimes%203%5Ctimes%2010%5E%7B8%7D%5Cleft%20%28%20%5Cfrac%7B1%7D%7B4%5Ctimes%2010%5E%7B-7%7D%20%7D%20-%5Cfrac%7B1%7D%7B7%5Ctimes%2010%5E%7B-7%7D%7D%5Cright%20%29)
K = 2.13 x 10^-19 J
K = 0.53 eV