Answer:
Physics is the natural science that studies matter,[a] its motion and behavior through space and time, and the related entities of energy and force.[2] Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves.[b][3][4][5]
Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest.[6] Over much of the past two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the Scientific Revolution in the 17th century these natural sciences emerged as unique research endeavors in their own right.[c] Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences[3] and suggest new avenues of research in academic disciplines such as mathematics and philosophy.
Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism, solid-state physics, and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons;[3] advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
Explanation:
I don't know tha explanation
Answer:
The electromotive force is the voltage measured across the cell terminals when "NO" current is being drawn. That is why electromotive forces are used in Wheatstone Bridges which measure the resistance of an external object.
Just measuring the voltage across a cell does not give one the true EMF because current drawn from the cell will cause a reduction of voltage of I * R where R is the internal resistance of the cell.
Taking into account the definition of calorimetry, the mass of the coffee is 253.33 g.
<h3>Calorimetry</h3>
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
- Q is the heat exchanged by a body of mass m.
- c is the specific heat sudstance.
- ΔT is the temperature variation.
<h3>Mass of coffee</h3>
In this case, you know:
- Q= 190 calories
- c= 1
![\frac{cal}{gC}](https://tex.z-dn.net/?f=%5Cfrac%7Bcal%7D%7BgC%7D)
- m= ?
- ΔT= 0.75 C
Replacing in the equation that allows to calculate heat exchanges is:
190 cal = 1
× m× 0.75 C
Solving:
m= 190 cal÷ (1
× 0.75 C)
<u><em>m=253.33 g</em></u>
Finally, the mass of the coffee is 253.33 g.
Learn more about calorimetry:
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