Answer:
See the answer below.
Explanation:
The latent heat of fusion is defined as the amount of energy needed to make a phase change from solid to liquid. And it can be calculated by means of the following expression:
where:
Qfusion = Heat Energy [J]
m = mass = 0.65 [kg]
Dh = latent heat fusion = 330000[J/kg]
![Q_{fusion}=0.65*330000\\Q_{fusion}=214500[J]](https://tex.z-dn.net/?f=Q_%7Bfusion%7D%3D0.65%2A330000%5C%5CQ_%7Bfusion%7D%3D214500%5BJ%5D)
2)
We know that energy can be calculated from power, where power is defined as the relationship between energy over time.
where:
P = power = 60 [w]
E = energy [J]
t = time = 5 [min] = 300 [s]
![E=P*t\\E=50*300\\E=15000[J]](https://tex.z-dn.net/?f=E%3DP%2At%5C%5CE%3D50%2A300%5C%5CE%3D15000%5BJ%5D)
The mass change due to the process is equal to:
![m=282-274\\m=8[g]=0.008[kg]](https://tex.z-dn.net/?f=m%3D282-274%5C%5Cm%3D8%5Bg%5D%3D0.008%5Bkg%5D)
Now using the following equation for the latent heat of Fusion, we can calculate this value:
![Q=m*Dh\\Dh =Q/m\\Dh=15000/0.008\\Dh=1875000[J/kg]](https://tex.z-dn.net/?f=Q%3Dm%2ADh%5C%5CDh%20%3DQ%2Fm%5C%5CDh%3D15000%2F0.008%5C%5CDh%3D1875000%5BJ%2Fkg%5D)
Since the spacecraft is two earth radii the surface of the earth, it is three earth radii above the center.
Given: Radius of the earth re = 6.38 x 10⁶ m r = 1.91 x 10⁷ m
Mass of the spacecraft Ms = 1600 Kg
Mass of the earth Me = 5.98 x 10²⁴ Kg
G = 6.67 X 10⁻¹¹ N.m²/Kg²
Formula: F = GMeMs/r²
F = (6.67 X 10⁻¹¹ N.m²/Kg²)(5.98 x 10²⁴ Kg)(1,600 Kg)/(1.91 x 10⁷ m)²
F = 6.38 X 10¹⁷ N/3.65 X 10¹⁴ m²
F = 1,748.5 N
Answer : When resistors are connected in parallel, the supply of current is equal to the sum of the currents passing through each of the resistors.
To be specific, the currents in the branches of a parallel circuit add up to the supply current. When resistors are connected in parallel, they have the same potential difference across them.
When resistors are connected in series the total resistance is greater than the individual resistances, hence the currents flow is less.
When resistors are connected in parallel, more current flows from the source than would flow for any of them individual resistors, so the total resistance is lower.
Answer: 
Explanation:
Given
Mass 
Spring constant 
Compression in the spring 
When the mass leaves the spring, the elastic potential energy of spring is being converted into kinetic energy of mass i.e.
The kinetic energy of the mass is 1.102 J.
Answer:
V4=9.197v
Explanation:
Given:
V1= 18v ,V2= 12v ,r1=r5=58ohms ,r2=r6=124ohms , r3=47ohms ,r4= 125ohms
V4= I4R4 = V2/(R4 + R5)×R4
V4= 12×125 /(125 + 58)
V4=1500/183 =9.197v
