Answer:
option d)
Explanation:
The amount of heat required to convert the 1 g of ice at 0 degree C to 1 g water at 0 degree C is called latent heta of fusion.
H = m Lf
where,, h is the heat required, m is the mass and Lf is the latent heat of fusion
1140 = m x 79.7
m = 14.3 g
Explanation:
Let us assume that the final resistance after stretching is 
. Since, the volume of rod does not change and the initial and final volume will be the same as follows.
V = 
It is given that, 
.
Therefore,
We know that relation between resistance and area is as follows.
R = 
= 
= 9 
= 9R
Thus, we can conclude that the resistance of the stretched wire is 9R.
Answer:
not work
Explanation:
in a series circuit, everything meaning the electrons are flowing on one path, therefore, it wouldn continue to work.
Answer:
4.74 x 10⁷ yr
Explanation:
m = Rate of conversion of mass to energy by sun = 4 x 10⁹ kg/s
t = total time taken to convert mass of earth to energy
M = mass of earth = 5.98 x 10²⁴ kg
Using the equation
M = m t
5.98 x 10²⁴ = (4 x 10⁹) t
t = 1.495 x 10¹⁵ sec
we know that, 1 yr = 3.154 x 10⁷ sec
t = (1.495 x 10¹⁵ sec) (3.154 x 10⁷ sec)⁻¹ yr
t = 4.74 x 10⁷ yr
A metaphor is<span> a comparison between two non related objects where the first object is said to be equal to the second.</span>
The answer is d.
