Answer: Hii
Explanation: I had a picture.. so i think this might help you.. I answered this question using this picture, so i thought same might go to u too.. Hv a look.. Good Luck..!!
Answer:
About 8.3 minutes
Explanation:
Use the formula for velocity as the distance covered by the light divided the time it takes: ![[tex]velocity=\frac{distance}{time}](https://tex.z-dn.net/?f=%5Btex%5Dvelocity%3D%5Cfrac%7Bdistance%7D%7Btime%7D)
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Use the information about the speed of light in vacuum: 
and the information you are given regarding the distance between Sun and Earth: 
to solve the first velocity equation for the unknown time "t":
we can convert second into minutes by dividing by 60: 500 s = 500/60 minutes = 8.3333... minutes
Answer:
Explanation:
capacitance of each capacitor
C₀= Q₀ / V₀
V₀ = Q₀ / C₀
New total capacitance = C₀ ( 1 + K )
Common potential
= total charge / total capacitance
= 2 Q₀ / [ C₀ ( 1 + K ) ]
2 V₀ / ( 1 + K )
b )
Common potential = 2 x V₀ / ( 1 + 7.8 )
= .227 V₀
charge on capacitor with dielectric
= .227 V₀ x 7.8 C₀
= 1.77 V₀C₀
= 1.77 Q₀
Ratio required = 1.77
Answer:
Fk = 21.645N
Explanation:
Let Fb be Force of block and thus;
Fb= mg where m is mass of block and g is acceleration due to gravity
Thus Fb= 9kg x 9.81N/kg = 88.29 N
Now, the question says this force Fb rests at an inclined plane [email protected] 30° angle
Thus;
Force parallel to inclined plane = 88.29 x sin30° = 44.145 N.
Force perpendicular to the inclined plane = 88.29 x cos30 = 76.46 N
Now, when an object is falling freely, we know that
h = (1/2)at^(2)
From the question, the height is 5m and t= 2 seconds
Thus;
5 = (1/2)a(2)^(2)
2a = 5 and thus,
a = 5/2 = 2.5 m/s^(2)
Now, in inclined planes, perpendicular force - kinetic friction force = Resultant force
Thus let perpendicular be Fp and kinetic friction force be Fk and so;
Fp - Fk = F
F= ma = 9 x 2.5 = 22.5N
Thus, 44.145 - Fk = 22.5
Thus, Fk = 44.145 - 22.5 = 21.645N
