A spring of spring constant 50. N/m is hanging from a retort stand. A second spring of spring constant 100. N/m is hanging from the bottom of the first spring. A mass of .50 kg is hung from the bottom of the lower spring at rest. Determine:

(a) the overall stretch of the spring combination

(b) the 'effective' spring constant of the spring combination

(c) a general expression for the spring constant of any combination of two springs connected in this manner

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c