Knowing that the density of cow's milk must be between these two values: 1,023 g / mL and 1,034 g / mL, so that if the milk is watered down, its density is less than 1,023 g / mL,
describe how you would investigate whether or not a milk is watery

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction

Why do atoms emit energy of only specific wavelengths