Answer:
>400N is needed to balance that lever
Answer:
Explanation:
Current is the rate of flow of charge.
Barium cation has +2 charge and oxide anion has −2 charge
That's Newton's 1st law of motion, sometimes called the inertia law.
Answer:
0.25 m
Explanation:
Refraction occurs when the velocity or wavelength of a wave changes at the interface between two media.
We know that refractive index=
Wavelength in medium A/wavelength in medium B = velocity in medium A/velocity in medium B
Let the wavelength of medium B be a
0.5/a = 0.3/0.15
0.5 × 0.15 = 0.3 × a
a= 0.5 × 0.15/0.3
a= 0.25 m
