Because the Earth's axis is not "straight up and down" as we move
around the sun.
So when we're on one side of the sun, the top pole leans slightly toward
the sun. During that time the sun shines more directly on the top half
of the Earth, and less directly on the bottom half. The people on the
top half see the sun higher in the sky, and their weather is warmer,
while the people on the bottom half see the sun lower in the sky, and
their weather is cooler.
Then, when we're on the other side of the sun, the top pole leans slightly
away from the sun. During that time the sun shines more directly on the
bottom half
of the Earth, and less directly on the top half. The people on
the bottom half see the sun higher in the sky, and their weather is warmer,
while the people on the top half see the sun lower in the sky, and their
weather is cooler.
The Earth makes the complete trip around the sun in one year, so the
people on the Earth go through this cycle of higher/lower sun and
warmer/cooler weather every year.
This is false. they flow west to east
The answer is B. magnesium I am pretty sure
Answer:
The net force on the electron is given as:
F = 1.35 x 10⁻¹³ N j - 1.35 x 10⁻¹³ N i
Explanation:
Given:
charge on rod along x-axis = Q₁ = -15 x 10⁻⁶ C
charge on rod along y-axis = Q₂ = 15 x 10⁻⁶ C
distance of electron from rod 1 = r₁ = 0.4 m
distance of electron from rod 1 = r₂ = 0.4 m
charge on electron = q = -1.6 x 10⁻¹⁹ C
ε° = 8.85 x 10⁻¹² C²/Nm²
Electric force on charge due to rod 1:
F₁ = qE = 1/4πε°(qQ₁/r₁²)
F₁ = (9 x 10⁹ x -1.6 x 10⁻¹⁹ x -15 x 10⁻⁶)/0.4²
F₁ = 1.35 x 10⁻¹³ N
Negative negative repels each other so the rod will Force the electron in positive y-direction.
F₁ = 1.35 x 10⁻¹³ N j
Electric force on charge due to rod 2:
F₂ = qE = 1/4πε°(qQ₂/r₂²)
F₂ = (9 x 10⁹ x -1.6 x 10⁻¹⁹ x 15 x 10⁻⁶)/0.4²
F₂ = - 1.35 x 10⁻¹³ N
Opposite charges attract each other so the rod will force the electron in negative x-direction.
F₂ = - 1.35 x 10⁻¹³ N i
Net Force:
F = F₁ + F₂
F = 1.35 x 10⁻¹³ N j - 1.35 x 10⁻¹³ N i
