1. a spring has an extenson of 4 cm when a weight of 0.5 N hangs from it. calculate the extension when a weight of 0.75 N hangs from it?

What is amperage, and what is its relationship to voltage and power?

3. The half-life of a radioactive atom is two months. If you start with lg of the element, how much will remain after six months? A. One-half of a gram will remain. B. One-fourth of a gram will remain. C. One-eighth of a gram will remain. D.

the linear expansivity of the material of a cube is 1.2*10^-6 k^-1. if the length of each side of the cube is 10cm. find the area of one face of the cube and the volume of the cube when it's temperature is raised by 30k.

The unit for measuring the strength of an electric current

A solution of phosphoric acid was made by dissolving 10.0 g H3PO4 in 100.0 mL water. The resulting volume was 104 mL. Calculate the density, mole fraction, molarity, and molality of the solution. Assume water has a density of 1.00 g/cm3.

Which of the following describes a physical change? A. Formation of a new substance caused by combining substances B. Water changing from liquid to gas through evaporation or boiling C. Formation of a new substance caused by application of heat

A wave seen at the ocean's shore is which kind of wave? A. Surface wave B. Transverse wave C. Latitudinal wave D. Longitudinal wave

The acceleration due to gravity is equal to second squared. (round to 2 significant digits)

In the diagram above (not to scale), Vx/y = 12.57 meters/second and Vy/z = 5.21 meters/second. What is the value of the resultant vector?

What are the Respiratory organs?