Sasha wanted to make a cake, but her flour had lumps in it. how could sasha remove the lumps from the rest of the flour? with a screen b. by boiling the flour c. with a magnet d. with chromatography

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?