Water, Water is not a pure substance. It is a mixture, and Chromatography
Optimization helps you make better choices when you have all the data, and simulation helps you understand the possible outcomes when you don’t. Frontline Solvers enable you to combine these analytic methods, so you can make better choices for decisions you do control, taking into account the range of potential outcomes for factors you don’t control.
Answer:
The specific heat capacity of silver is 0.24 j/g.°C.
Explanation:
Given data:
Mass of sample = 55.00 g
increase of temperature ΔT= 15.0 °C
Heat absorbed = 193.9 J
Specific heat capacity of silver = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance.
ΔT = change in temperature
Now we will put the values in formula.
193.9 J = 55.00 g × c ×15.0 °C
193.9 J = 825 g.°C × c
c = 193.9 J / 825 g.°C
c= 0.24 /g.°C
The specific heat capacity of silver is 0.24 j/g.°C.
Answer: option c. magnitude and direction
Explanation:
1) Force is a vector: it has magnitude and direction.
2) Magnitude measures the "intensity" of the force. It is measured in newtons (N), in the SI (international system of units). One newton is the force exerted to confere an acceleration of 1 m/s² to a mass of 1 kg.
3) Telling the magnitude of the force is not enough information to understand what the force is and to predict its effect.
It is necessary to tell the direction in which the force is applied.
It is not the same a force of 10 N that pulls that the same magnitude pushing. And it is not the same a hhorizontal force of 100 N to move an object, than the same magnitude applied at an agle.
That is why the force must be measured and reported as a magnitude and a direction.
4) Examples of forces correctly reported are:
i) 100 N vertically upward
ii) 1000 N 20° to the east of the north.
iii) 0.2 N with an elevation angle of 50°.
Then, scientists must measure the magnitude and the direction of the force.
Answer:
La tabla periódica, también conocida como la tabla periódica de elementos, es una visualización tabular de los elementos químicos, que están organizados por número atómico, configuración electrónica y propiedades químicas recurrentes. La estructura de la tabla muestra tendencias periódicas.
Explanation:
google definition
