Answer:
The wire now has less (the half resistance) than before.
Explanation:
The resistance in a wire is calculated as:

Were:
R is resistance
is the resistance coefficient
l is the length of the material
s is the area of the transversal wire, in the case of wire will be circular area (
).
So if the lenght and radius are doubled, the equation goes as follows:

So finally because the circular area is a square function, the resulting equation is half of the one before.
The work done by a system on a different body is equal to the product of the force exerted and the distance that the body has move in parallel to the force exerted. In this item, we have to determine first the distance and multiply it with the given force equal to 750N.
Answer:
79·433 ×
W/m²
Explanation:
Given intensity of sound in decibels is 19
Formula for intensity of sound in decibels is
<h3>

= 10 × ㏒(I ÷

)</h3>
where
is the intensity of sound measured in decibels
I is the intensity of sound measured in W/m²
is the intensity of the sound that is taken as standard and it's value is equal to
W/m²
By applying the formula
19 = 10 × ㏒(I ÷
)
⇒ 1·9 = ㏒(I ÷
)
⇒ antilog(1·9) = I ÷ 
⇒ 79·433 = I ÷ 
⇒ I = 79·433 ×
W/m²
∴ Intensity of sound = 79·433 ×
W/m²
Answer:
may be or sometimes not
Explanation:
It depends on those who Surround you and your confidence
Answer:
For one dimensional box
E= 
For lowest energy transition will be from n =1 to n=2
Hence,

h= 6.626 *10-34 J.s
m = 9.31 *10-31 Kg
L= 0.14 * 10-9 m
c= 3 *108 m/s


Not in visible range