A 0.5 kg ball is thrown at 20 m/s. With what speed must a 2.5 kg ball be thrown so that it has the same momentum? A. 2 m/s B. 4 m/s C. 10 m/s D. 50 m/s

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Which component is used to measure the current in a circuit? oa. switch ob. resistor oc. ammeter the answer is c. for y’all plato people

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?