Which of the following is NOT an example of a medium.
1 answer:
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Answer:
Masa, m = 0.088 kg
Explanation:
Given the following data;
Temperatura inicial = 30°C
Temperatura final = 120°C
Capacidad calorífica específica = 138J/kg.K
Calor absorbido, Q = 4400 cal.
Para encontrar la masa;
La capacidad calorífica viene dada por la fórmula;
Dónde;
Q representa la capacidad calorífica o la cantidad de calor.
m representa la masa de un objeto.
c representa la capacidad calorífica específica del agua.
dt representa el cambio de temperatura.
dt = T2 - T1
dt = 120 - 30
dt = 90°C to kelvin = 273 + 90 = 363K
Sustituyendo en la fórmula, tenemos;
Masa, m = 0.088 kg
Answer:
(a) The speed of the lighter block is .
The speed of the heavier block is .
(b) The smaller block goes up to 0.69 m.
Explanation:
We will divide this question into three parts: Part A is for the smaller mass from the top of the incline to the collision. Part B is the collision. And Part C is for the smaller mass from the bottom to the highest point it can achieve.
In order to solve this question, I will assume that the smaller mass is initially at rest.
Part A:
We will use conservation of energy.
This is the speed of the smaller mass just before the collision. The velocity of the mass is directed 30° above horizontal, since the mass is sliding down the incline.
Part B:
Momentum is a vector identity, so the x- and y-components of momentum are to be investigated separately. Since the collision occurs at the horizontal surface, only the x-component of momentum is conserved.
During the collision kinetic energy is also conserved. Since kinetic energy is a scalar quantity, we don't have to separate its components.
The following relation will be used when combining the two equations:
The following equation is useful for combining the two equations:
Therefore from the first equation,
Part C:
We will again use the conservation of energy to find the highest point that the mass can go: