Answer:
MgO
Explanation:
A magnesium ion has a charge of +2 and an oxygen ion has a charge of –2.
Molecule made by ions is neutral . In case of Magnesium oxide molecule it is possible only when on magnesium ion and one oxide ion join together to form molecule . The total charge of molecule will be + 2 - 2 = 0 . In this way molecule formed becomes neutral . Hence formula of magnesium oxide is
MgO .
Explanation:
1. Given:
v₀ = 0 m/s
a = 2.0 m/s²
t = 1.2 s
Find: v
v = at + v₀
v = (2.0 m/s²) (1.2 s) + 0 m/s
v = 2.4 m/s
2. Given:
v₀ = 0 m/s
v = 9.0 m/s
a = 2.2 m/s²
Find: t
v = at + v₀
9.0 m/s = (2.2 m/s²) t + 0 m/s
t ≈ 4.1 s
Answer:
b ≈ 64 Kg/s
Explanation:
Given
Fd = −bv
m = 2.5 kg
y = 6.0 cm = 0.06 m
g = 9.81 m/s²
The object in the pan comes to rest in the minimum time without overshoot. this means that damping is critical (b² = 4*k*m).
m is given and we find k from the equilibrium extension of 6.0 cm (0.06 m):
∑Fy = 0 (↑)
k*y - W = 0 ⇒ k*y - m*g = 0 ⇒ k = m*g / y
⇒ k = (2.5 kg)*(9.81 m/s²) / (0.06 m)
⇒ k = 408.75 N/m
Hence, if
b² = 4*k*m ⇒ b = √(4*k*m) = 2*√(k*m)
⇒ b = 2*√(k*m) = 2*√(408.75 N/m*2.5 kg)
⇒ b = 63.9335 Kg/s ≈ 64 Kg/s
The answer is 10 i think so
Given,
initial velocity, u = 10m/s
acceleration, a = -8m/s²
time, t = 2s
This is the answer.
Hope it helps!!