Science asap ! 35 points what is the primary role of the respiratory system in humans. a)to make carbon dioxide b)to obtain oxygen c)to use nitrogen d)to find hydrogen

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?