Just remember
Voltage = current times resistance
current = voltage over resistance
Current = 9/3 = 3
Answer:

Explanation:
From the concept of fluids mechanics we know that if a tank has a hole at the bottom, the equation that we need to use is:

Since we know gravity and its hight

Answer:
Stars emit colors of many different wavelengths, but the wavelength of light where a star's emission is concentrated is related to the star's temperature - the hotter the star, the more blue it is; the cooler the star, the more red it is
Answer:
the two factors are the mass of the objects and the coefficient of friction between them
Explanation:
internet :)