Answer:
Explanation:
The process is modelled after the First Law of Thermodynamics:
![(6000\,g) \cdot \left(0.385\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (T -0^{\textdegree}C ) = (2000\,g)\cdot \left(2.108\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot [0^{\textdegree}C -(-10^{\textdegree}C)] + (1500\,g)\cdot \left(334\,\frac{J}{g} \right)](https://tex.z-dn.net/?f=%286000%5C%2Cg%29%20%5Ccdot%20%5Cleft%280.385%5C%2C%5Cfrac%7BJ%7D%7Bg%5Ccdot%20%5E%7B%5Ctextdegree%7DC%7D%20%5Cright%29%5Ccdot%20%28T%20-0%5E%7B%5Ctextdegree%7DC%20%29%20%3D%20%282000%5C%2Cg%29%5Ccdot%20%5Cleft%282.108%5C%2C%5Cfrac%7BJ%7D%7Bg%5Ccdot%20%5E%7B%5Ctextdegree%7DC%7D%20%5Cright%29%5Ccdot%20%5B0%5E%7B%5Ctextdegree%7DC%20-%28-10%5E%7B%5Ctextdegree%7DC%29%5D%20%2B%20%281500%5C%2Cg%29%5Ccdot%20%5Cleft%28334%5C%2C%5Cfrac%7BJ%7D%7Bg%7D%20%5Cright%29)
The initial temperature of the piece of solid copper is:
Answer:
t=63s
tempersture gradient -2.36 x 10⁴
Explanation:
Answer:
The current must be 5 times larger
Explanation:
The equation for Inductance, is given by;
L = (μ_o•N²•A)/l
Where;
μ_o is the permeability of the core material
N is the number of turns
A is the cross sectional Area
l is the length of the coil in meters
L is the inductance
However, we also need to find an expression for the Energy Stored, and the equation is given by;
U = (1/2)LI²
Where;
L is the inductance
I is the current.
We also know that U is proportional to the number of turns and the current.
Thus, we can conclude that;
N_2/N_1 = I_1/I_2
From the question, we are told that the number of turns is reduces by 1/5. Thus,
1/5 = I_1/I_2
So, I_2 = 5I_1
So the current must be 5 times larger
The Rock's acceleration is 9.8 m/s^2 from the moment it leaves your hand until the moment it hits the ground. Its acceleration never changes. That's the acceleration of gravity as long as nothing is pushing the rock or holding it back.
