Le déplacement est défini comme la distance entre la position initiale et finale du corps. Après un tour complet, la terre revient à sa position initiale. La distance entre la position initiale et la position finale est donc nulle.
Le déplacement de la terre est donc nul. Par conséquent, la déclaration donnée est vraie.
Answer:
I'm glad you asked!
Explanation:
The answer is the first one.Pure substances are substances that are mixed together.The picture shows that they are pure substances.Pure substances are always combined.So that makes it the first one.
Unlike humans, termites are able to extract energy from wood because: they have some microorganisms living in their gut that are able to break down cellulose.
Answer:
3.89002 × 10 ⁻⁷m = 389.002nm.
Explanation:
Without mincing words let's dive straight into the solution to the problem above. To calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n = 2 to an orbital with n = 8, there is the need to make use of the change in energy equation.
The change in energy = 2.18 × 10⁻¹⁸ [ 1/2² - 1/8²] = 2.18 × 10⁻¹⁸ × [0.25 - 0.015625] = 2.18 × 10⁻¹⁸ × 0.234375 = 5.11 × 10⁻¹⁹.
Therefore, the wavelength = plank's constant × speed of light/ change in energy = 6.626× 10⁻³⁴ × 3 × 10⁸/ 5.11 × 10⁻¹⁹ = 1.9878 × 10⁻²⁵/ 5.11 × 10⁻¹⁹ = 0.389002 × 10⁻⁶ = 3.89002 × 10 ⁻⁷m = 389.002nm.
