Answer: 13.2678 kg
Explanation: Well, 13.2678 kg is 29.25 in mass and kg.
Answer:
![P=268kW](https://tex.z-dn.net/?f=P%3D268kW)
Explanation:
Given data
Mass of elevator m=3.0×10³kg
Time t=23 seconds
Height d=210 m
Concept:
Power is defined as rate at which work is done by force is said to be the power due to force.
The power can be calculated as
![P=FVCos\alpha](https://tex.z-dn.net/?f=P%3DFVCos%5Calpha)
First we need to find the force by applying newtons law of motion
So
![F=mg\\F=(3000kg)(9.8m/s^2)\\F=29400N](https://tex.z-dn.net/?f=F%3Dmg%5C%5CF%3D%283000kg%29%289.8m%2Fs%5E2%29%5C%5CF%3D29400N)
Now we need to find the velocity V
So
![V=distance/time\\V=210m/23s\\V=9.13m/s](https://tex.z-dn.net/?f=V%3Ddistance%2Ftime%5C%5CV%3D210m%2F23s%5C%5CV%3D9.13m%2Fs)
Now to put values of Force and velocity to find the power.As the force have same direction of motion so angle is zero
![P=FVCos\alpha \\P=(29400N)(9.13m/s)Cos(0)\\P=268kW](https://tex.z-dn.net/?f=P%3DFVCos%5Calpha%20%5C%5CP%3D%2829400N%29%289.13m%2Fs%29Cos%280%29%5C%5CP%3D268kW)
Explanation:
The Dalton's atomic theory was proposed by John Dalton in the 19th century through his experiment on gases. Some of his propositions are;
- Atoms are the smallest indivisible particles of matter and they can neither be created nor destroyed.
- Elements have identical atoms that are different from atoms of other elements.
- Atoms vary in size and mass for different elements and this distinguishes them from atoms of other elements.
- Whole number combination of atoms results in the formation of compounds.
- Compounds are formed in chemical reactions when atoms recombine with one another.
You can compare your options with any of the statements above.
Learn more:
Dalton's atomic theory brainly.com/question/1979129
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Answer:
c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave
Explanation:
An electromagnetic wave carries energy that is given by the vector of poyntíng
S = 1 / μ₀ E x B
The electric and magnetic fields are related
E = c B
Substituting
S = c /μ₀ B² / 2
The two comes from the average value
Let's examine the claims
a) false to determine the wavelength the frequency is needed
b) False. To find the electric field you need the magnetic field
c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave
In physical chemistry, the terms body-centered cubic (BCC) and face-centered cubic (FCC) refer to the cubic crystal system of a solid. Each solid is made up simple building blocks called lattice units. There are different layouts of a lattice unit.
It is better understood using 3-D models shown in the picture. A BCC unit cell has one lattice point in the center, together with eight corner atoms which represents 1/8 of an atom. Therefore, there are 1+ 8(1/8) = 2 atoms in a BCC unit cell. On the other hand, a FCC unit cell is composed of half of an atom in each of its faces and 1/8 of an atom in its corners. Therefore, there are (1/2)6 + (1/8)8 = 4 atoms in a FCC unit cell.