Answer:
chgfsgfsgsahfsgfggfsgasgsgfgfggdfdsseeerasfasfafvvdavadvdafdfgdb
Explanation:
bbfgfsgssdfeffsdfdffdgsgggfffrterrwrwftgwrtrtqvggsgfgdfhfghh
Answer:
radiation reaches the earth it must be absorbed by the different living organisms and when using part of its energy is transformed into radiation of greater wavelength (lower energy) that is irradiated by these organisms; This infrared radiation is absorbed by different gases in the atmosphere
Explanation:
The radiation that comes from the Sun has all wavelengths, due to the 5500K sun temperature its maximum emission is 550 nm (green), when this radiation reaches the earth it must be absorbed by the different living organisms and when using part of its energy is transformed into radiation of greater wavelength (lower energy) that is irradiated by these organisms; This infrared radiation is absorbed by different gases in the atmosphere and cannot escape, creating the so-called greenhouse effect.
If the initial wavelength does not change, it would be emitted into space whereby such temperature of the planet will decrease significantly
Answer:
Friction
Explanation:
As the skateboarder goes down the ramp, potential energy is converted to kinetic energy. Because of friction, some of the energy in the system is converted to heat energy. Once the kinetic energy is converted to heat, the energy cannot be converted back to the potential or kinetic energy in the system.
Answer:
Scalar quantities: a. Speed
b. Density
Vector quantities: a. Force
b. Displacement
c. Velocity
Explanation:
A vector quantity is a physical quantity that has magnitude and direction so force, displacement and velocity are considered vector quantities because they have magnitude and direction
A scalar quantity is a physical quantity that has magnitude and direction so speed and density are scalar quantities because they have magnitude only
Answer:
B = μ₀ I / 2π L
Explanation:
The biot-Savart law has the equation
B = μ₀ I / 4π ∫ ds * r ^ / r²
Where the vector product gives the direction of the field, ds is taken along the wire length
ds * r ^ = ds sin θ
B = μ₀ I / 4π I ds sinθ / r²
r is the distance from current element to the point of interest, to make the calculation easier suppose that the wire is on the x-axis and the calculation point on the Y-axis at a distance L
ds = dx
We have to write the integral in terms of a single integration variable, if we use geometry, we can write everything in function angle (θ)
sin θ = L / r
r = L / sin θ = L csc θ
tan θ = L / x
x = L / tan θ
dx = L csc²θ dθ
substitutions and calculate
B = μ₀ I / 4π I (L csc²θ dθ) sinθ / (L cscθ)²
B = μ₀ I / 4π I dθ sinθ / a
B = μ₀ I / 4π I dθ sinθ / a
B = μ₀ I 4π L (cos T1-cosT2)
If the wire is very long θ1 = 0 t θ2 =π (cos θ1 -cosθ2) = 2
B = μ₀ I / 2π L
This is the solution
