SI units are useful because they are all related by multiples of ____.
Answers
Answer:
SI units are useful because they are all related by multiples of 10.
Explanation:
International System of Units (abbreviated SI) is a system of measurement units, which is used almost everywhere in the world.
A unit system is a set of units of consistent, standard and uniform measurement. In other words, a unit system is a set of units (grouped and formally defined) that is used as a standard. Normally, in a system of units, few basic units are defined and from these several derived units are defined.
The International System of Units defines seven basic units, also called fundamental units, which define the corresponding fundamental physical quantities, chosen by convention, and which allow to express any physical quantity in terms or as a combination of them. The other units are obtained by combining the basic units.
The basic units of this system are:
- Length-meter (m)
- Mass-kilogram (kg)
- Time- second (s)
- Electric current intensity - ampere (A)
- Temperature - Kelvin (K)
- Amount of substance - mol (mol)
- Light intensity - candela (cd)
The SI is based on the metric system, which is a system of units that are related to each other by multiples or submultiples of 10.
Then, SI units are useful because they are all related by multiples of 10.
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Answers
Answer:
See the explanation below
Explanation:
Both the cup of coffee and drop of coffee have the Same temperature of 95°C.
Although the difference is the cup of coffee has more heat contained in it than the drop of coffee. An explanation is when we heat a cup of coffee it will take more time to Attain in 95°C while the drop of coffee will take less time
Final answer:
The difference between a cup and a drop of tea at the same temperature is largely related to their different quantities, affecting the heat capacity and cooling rate. The cup has a higher heat capacity and cools down slower, while the drop cools down faster.
Explanation:
The difference between a cup of tea at 95°C and a drop of tea at 95°C is primarily a matter of quantity and its implications on heat capacity and cooling rate.
Both the cup and the drop of tea are at the same temperature, 95°C, however, the cup of tea contains a larger quantity or volume of tea. This means the cup of tea has a higher heat capacity.
What this signifies is that it would take more energy to change the temperature of the cup of tea than the drop of tea. Conversely, the drop of tea, having a lower heat capacity, will cool down faster than the cup. The larger volume and surface area of the cup of tea allows it to contain more heat and thus, lose heat slower than a drop.
Learn more about Heat Capacity here:
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It is endothermic and will have a positive enthalpy.
B)
It is endothermic and will have a negative enthalpy
C)
It is exothermic and will have a positive enthalpy.
D)
It is exothermic and will have a negative enthalpy.
Answers
Answer is (D) - It is exothermic and will have a negative enthalpy.
If the reactants are at a higher potential energy compared to the products, it means reactants have more energy than the products. That energy is released to the environment as heat. Due to the releasing of heat to the surrounding, the reaction is exothermic. Since the reaction is exothermic; the enthalpy of the reaction will be negative value.
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Answers
Answer:
B.) CaCl2
Explanation:
CaCl2 Calcium has a positive 2 charge and chlorine has a negative 1 charge. It takes 2 chlorine atoms for every calcium in order to be neutral.
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