Answer:
1. Count the atoms of each element in the reactants and the products.
2. Use coefficients; place them in front of the compounds as needed.
Explanation:
Explanation:
Given that,
Magnitude of electric field in +x direction, E = 4.9 V/m
Part A :
The relation between electric and magnetic field is given by :
![B=\dfrac{E}{c}](https://tex.z-dn.net/?f=B%3D%5Cdfrac%7BE%7D%7Bc%7D)
c is the speed of light
![B=\dfrac{4.9\ V/m}{3\times 10^8\ m/s}](https://tex.z-dn.net/?f=B%3D%5Cdfrac%7B4.9%5C%20V%2Fm%7D%7B3%5Ctimes%2010%5E8%5C%20m%2Fs%7D)
![B=1.63\times 10^{-8}\ T](https://tex.z-dn.net/?f=B%3D1.63%5Ctimes%2010%5E%7B-8%7D%5C%20T)
So, the magnetic field of the wave at this same point in space and instant in time is
.\
Part B :
The direction of electric and magnetic field is same i.e. +x direction.
Hence, this is the required solution.
Pressure= F/A
Given, F=30 N
Area=20 m^2
Putting values in formula,
Pressure = 30/20
=3/2
=1.5 Pascals
Two or more elements that are chemically combined
The coefficient of expansion is 13 * 10^-6 m per meter length.per oK
The temperature difference = 42 - - 8 = 50 oC
delta T = (42 + 273) - (-8 + 273) = 50 oK
delta L = L * 13* 10^6 m/oK
oK = 50 oK delta L = 19.5 cm = 19.5 cm [1m / 100 cm] = 0.195m
So we need to find the length and it is computed by:
0.195= L * 13 * 10^-6 * 50 L = 0.195 / (13*10^-6*50) L = 300 m