Answer:
Chemical formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's chemical formula cannot be reduced any more, then the empirical formula is the same as the chemical formula. Combustion analysis can determine the empirical formula of a compound, but cannot determine the chemical formula (other techniques can though). Once known, the chemical formula can be calculated from the empirical formula.
Explanation:
Answer:
Force is defined as the push or pull on a body which changes or tends to change the state of rest or uniform motion in a straight line.
The SI unit of force is Newton (N)
<h3>
Further more information:</h3>
Simply, pull or push is called force. A book lying on the table continues to lie on the table unless and external force is applied in it. So, Generally force is an external agency which changes or tends to change the state of rest to motion or vice versa. The SI unit of force is Newton. In CGS system, the unit of force is dyne.
1 Newton:
<h3>
<u>Force </u><u>acting</u><u> </u><u>on</u><u> </u><u>a</u><u> </u><u>body</u><u> </u><u>can</u><u> </u><u>do </u><u>the</u><u> </u><u>followi</u><u>ng</u><u> </u><u>things</u><u>:</u></h3>
- It can change the speed of the body.
- It can change the direction of motion of body.
- It can change the shape of the body.
- It can change the position of the body.
Hope this helps...
Good luck on your assignment...
Answer:
Option D
0.83 m/s2
Explanation:
Time is assumed as 10 seconds
First, convert the speeds from km/h to m/s
20 km/h\times \frac {1000 m}{3600 s}=5.555555556 m/s
\approx 5.56 m/s
50 km/h\times \frac {1000 m}{3600 s}=13.88888889 m/s \approx 13.89 m/s
Acceleration, where u and v are the initial and final velocities respectively, t is the time taken to accelerate.
Substituting 13.89 m/s for v, 5.56 m/s for u and 10 s for t then
Answer:
225nm
Explanation:
The Maxima of diffraction girating
dsin( θ)= m(λ)
Where θ)= angle between central axis and corresponding point
The wavelength is to corresponding sin( θ)
Then the maximum number of (λ) can be seen by setting sin( θ)= 1 then
d= m(λ)
At fifth order maximum m=1 then
d= 5(λ)
Where d= distance between the slit and with girating of 1/890rullig/mm
d= 1/890rullig/mm= 8.90×10^-6m
At maximum wavelength
d= 5(λ)
(λ)=5/d
= 8.90×10^-6m/5
=2.75*10^-7
= 275nm
Therefore, longest wavelength that forms an intensity maximum in the fifth order is 275nm