Explanation:
... in every interaction, there is a pair of forces acting on the two interacting objects. The size of the force on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Oxygen bc plants go through photosynthesis which keeps producing more oxygen
Answer:
Explanation:
Given that
Diameter of laser beam d= 2.4 mm
Radius of laser beam r= 1.2 mm
Power P =1.7 W
We know that intensity(I) of laser beam given as follows
Now by putting the values
So
So the intensity at 1.76 m away from laser
Answer:
A. the magnitude of the force between the spheres is 3.97 x 10⁻⁴ N
B. the magnitude of its initial acceleration is 5.83 m/s²
Explanation:
given information:
metal sphere's mass, m = 0.1 g = 1 x 10⁻⁴ kg
charge, q = -21 nC = -2.1 x 10⁻⁸
r = 10 cm = 0.1 m
What is the magnitude of the force between the spheres?
F₁₂ = k q₁q₂/r²
= ( 9 x 10⁹) (-2.1 x 10⁻⁸)²/(0.1)²
= 3.97 x 10⁻⁴ N
If the upper sphere is released, it will begin to fall. What is the magnitude of its initial acceleration?
mg - F₁₂ = ma
a = g - (F₁₂/m)
= 9.8 - (3.97 x 10⁻⁴/1 x 10⁻⁴)
= 5.83 m/s²
Answer:
Fe - Element
Fe2O3 - Compound
Explanation:
From the given chemical formula for two substances, Fe and Fe2O3, Fe is an element while fe2O3 is a compound.
It is so because an element is consist of the same type of atoms while a compund is consist of different atoms under specific proportions. for example: Fe is an element while fe2O3 is a compound.
Hence, the correct answer is:
Fe - Element
Fe2O3 - Compound
