Answer:
I only really know the "How do we use these EM waves in our lives?" part srry
Explanation:
EM waves are used to make sure you cellphone, radio, TV, and etc. have service/ connection.
constant.
B) The car is traveling at a constant rate of speed so it is not accelerating and
the velocity does not change.
C) Acceleration is the change in velocity so the car is experiencing a change
in velocity and it is accelerating.
D) The car is traveling at a constant rate of speed so it is not accelerating but
the velocity changes because the direction the car travels is constantly
changing
Answer:
B) The car is traveling at a constant rate of speed so it is not accelerating and the velocity does not change.
Explanation:
Since the driver is maintaining his speed, therefore velocity is constant and there is no acceleration because acceleration is the rate of change of speed with time.
Answer:If the forces on an object are balanced, the net force is zero.
Explanation:
If the forces are unbalanced forces, the effects don't cancel each other. Any time the forces acting on an object are unbalanced, the net force is not zero, and the motion of the object changes.
B.) Solid sodium chloride is a good conductor of electric current.
C.) Sodium chloride has a low melting point.
D.) Liquid sodium chloride is a good conductor of electric current.
NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.c Thus, option D is correct.
The ions (Na+& Cl) are free to move around and can thus function as charge carriers, since the motility of individual atoms or molecules in liquid state is significantly larger than that of solid state. Because of the free ions, molten sodium chloride is a good conductor of electricity.
The charged particles (ions) in solid “[NaCl]” cannot move because they are bound by powerful electrostatic forces, making it a poor conductor of electricity. They cannot conduct electricity as a result.
Therefore, NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.
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D. because sodium chloride is an ion
first of all , sodium chloride is salt and we all know that it is not malleable.
sodium chloride is an ion which do conduct electricity but not when they are solid.....they only do so when they are molten or aqueous ( dissolved in water )
sodium chloride is an ion. ions have high melting points.
D is true because as i have mentioned above , ions will conduct electricity when dissolved in water / aqueous or molten.......... HOPE IT HELPED !!!!!!
Plug
Battery
Light
PLZ HELP THIS IS DUE TODAY!!
Answer:
First, you need to charge the battery.
You do this by connecting the device to the electricity, in this way you can store the energy, that comes in form of electric energy, in the battery, that stores the energy in form of chemical energy.
When you push the "ON" button, the energy stored in the battery starts to run in the device, in form of electrical energy, in this way it reaches all the components and the computer is fully turned on.
At this moment the Chromebook turns on its screen, producing luminous energy (so consumes the electric energy that comes from the battery, and turns it into luminous energy).
There are other transformations, for example, in the cooler (the small fan inside the device) there is a transformation from electrical energy to mechanical energy (because the fan is rotating now).
Mechanical waves are created when a source of energy causes a medium to vibrate or oscillate.
The medium refers to the material or substance through which the wave travels, such as air, water, or a solid object. When the source of energy, such as an object in motion or a disturbance, interacts with the medium, it transfers energy to the particles or elements of the medium.
As the energy is transferred, the particles within the medium start to move back and forth or up and down, transmitting the energy from one particle to the next. This collective motion of particles creates a wave that propagates through the medium. The wave carries the energy of the initial disturbance or source and can travel over short or long distances, depending on the properties of the medium.
Therefore, mechanical waves are formed when a source of energy imparts motion to a medium, causing its particles to vibrate and propagate the energy through the medium in the form of a wave.
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Answer:
Sublimation is defined as the direct transition of a substance from solid state to gaseous state. The latent heat of sublimation is the sum of heat required for conversion from solid to liquid and heat required for conversion from liquid to gas. As in sublimation solid substance directly goes to gaseous state therefore, it is very difficult to find the components of latent heat of sublimation. This is the issue which arises in determining latent heat of sublimation.
On the other hand, when substance is melted it physically goes from solid to liquid. One can easily measure the heat required for this conversion.
Latent heat determination challenges differ between substances that sublime and those that melt. Sublimation involves a solid-to-gas change, typically under low pressure, making it difficult to contain the gas and measure accurate energy changes. In contrast, melting transitions from solid to liquid, with challenges in accurately measuring temperature change and ensuring complete melting.
When determining the latent heat of substances, different issues can arise depending on if the substance sublimes or melts. Melting is a transition from a solid to a liquid state, while sublimation involves a transition directly from a solid to a gas state.
One issue that might arise would be managing the environmental conditions. Sublimation often happens at low pressure, and ensuring a consistent low-pressure environment can be challenging. Also, because the substance is transitioning directly to a gas, it may be more difficult to accurately measure the energy change as some gas may escape during the process.
For melting substances, the issues are different as one is transitioning from a solid to a liquid state, and it's typically measured at atmospheric pressure. Accuracy in measuring the temperature change and ensuring the entire substance has completely melted are potential challenges.
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