What is kirchoff s law???
Answers
Here they are in my own words:
1). The sum of the voltage drops around any closed loop in a circuit is zero.
2). The sum of the currents at any single point in a circuit is zero.
1 Kirchhoff's current law:
it states that the sum of all currents flowing in all conductors that meet at single point is zero..
2 Kirchhoff's voltage law:
it states that the algebraic sum of all voltages around any closed network is zero...
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State whether these questions are true or false.Q1) Distance formula is displacement/time T/F?Q2)velocity formula is = displacement/time T/F?
What is the final speed of a lion initially running at a speed of 30 m/s, if it accelerates ata rate of 3 m/s3 for 5 seconds?
For which of these scenarios is total internal reflection possible?
Answers
Answer :
1) Luster → the shininess of a material
2) Freezing point → temperature at which a liquid becomes a solid
3) Viscosity → the measure of a substance's resistance to flow
4) Solubility → ability to dissolve in another substance
5) Ductility → able to be pulled into a wire
Explanation :
Luster : It is defined as the material which has the shining property.
Freezing point : It is the temperature at which the phase changes from liquid state to solid state at low temperature.
Viscosity : It measures the resistance of the liquids to flow .
Solubility : It is defined as the ability of a substance (solute) to dissolve into a liquid (solvent).
Ductility : It is defined as the ability of a metal into a thin wire without breaking.
Final answer:
The physical properties are correctly matched as: Luster corresponds to the shininess of a material, freezing point is the temperature at which a liquid becomes solid, viscosity is the measure of a substance's resistance to flow, solubility is the ability to dissolve in another substance, and ductility refers to a substance's ability to be pulled into a wire
Explanation:
The correct matches for the physical properties and their descriptions are as follows:
- Luster is the shininess of a material.
- Freezing point is the temperature at which a liquid becomes a solid.
- Viscosity is the measure of a substance's resistance to flow.
- Solubility is the ability to dissolve in another substance.
- Ductility is the property to be pulled into a wire.
It's crucial to understand these properties in chemistry, as they help us identify and characterize different substances.
Learn more about Physical Properties here:
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Answers
The wavelength of violet light with a frequency of 750 × 10^12 Hz is 400 nanometers (nm).
Wavelength is the distance between two consecutive peaks or troughs of a wave, representing the length of one complete cycle of the wave. It is commonly used to describe the size or scale of various types of waves, including electromagnetic waves such as light.
To calculate the wavelength of light, you can use the formula:
wavelength = speed of light/frequency
The speed of light is approximately 3.00 × 10^8 meters per second.
Let's plug in the values:
frequency = 750 × 10^12 Hz
speed of light = 3.00 × 10^8 m/s
wavelength = (3.00 × 10^8 m/s) / (750 × 10^12 Hz)
Simplifying the expression:
wavelength = (3.00 / 750) × (10^8 / 10^12) m
wavelength = 4.00 × 10^-4 m
Therefore, the wavelength of violet light is approximately 4.00 × 10^-4 meters or 400 nanometers (nm).
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L = (299,792,458 m/s) / (750E12 Hz) = 3.9972E-7 = 399.72E-9
or roughly 400 nanometers
b) visible light, infrared, X rays, ultraviolet, gamma rays, radio
c) radio, infrared, visible light, ultraviolet, X rays, gamma rays
d) gamma rays, X rays, visible light, ultraviolet, infrared, radio
e) radio, X rays, visible light, ultraviolet, infrared, gamma rays
Answers
Answer: The answer is "C"
Explanation:
The electromagnetic waves are arranged in the increasing wavelength and energy by the following order;
Radio waves has the lowest energy and wavelength but of the highest frequency.
The Infra-red rays follows the visible light follows, the ultraviolet ray follows, the X-ray follows and then the Gamma-ray has the highest energy and wavelength but the lowest frequency.
Therefore the answer is C, radio, infra, visible, ultraviolet, x-ray, gamma.
Answer:
C
Explanation:
Electromagnetic waves are categorized in terms of their wavelengths and frequency. This categorization is known as the Electromagnetic Spectrum.
When they are arranged in terms of increasing frequency, their wavelengths are decreasing. This is because wavelength and frequency are inversely proportional.
Since energy and frequency are directly proportional, increasing frequency would mean increasing energy.
In terms of increasing energy, the correct order is:
Radio waves
Infrared
Visible light
Ultraviolet
X rays
Gamma rays
Answers
Answer:
No chemical bonds are broken or formed in melting butter, so it is not a chemical change. The melting process is only a physical change, the change of state from solid to liquid.
Answer:
I think it's physical change because originally it was a solid but now it's a liquid and its chemical properties have not changed only shape
Answers
Answer:
80 seconds
Explanation:
40/.5 is equal to 40*2 which is 80 or in another way 1 second is 2 seconds is 1 m
Answers
Explanation :
The efficiency of a machine is always less than 100 %. This is because some of the energy gets lost in the form of heat energy, sound energy and frictional energy.
Mathematically it is defined as :
Where,
is the efficiency
is output work
is input work
Hence, this is the required explanation.