Calculate the spring constant if a weight of 250N is added to a spring which increases in length by 20cm

J. J. Thomson's experiments provided evidence that an atom A. is the smallest particle of matter. B. contains negatively charged particles. C. has a negative charge. D. has a positive charge.

Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel? A. A compound B. An element C. A molecule D. An alloy

Current can also be called a. voltage. b. electricity. c. moving charges. d. b. and c.

Why is having a scientific model of an Atom important

Which of the following can be used to measure wavelength on a transverse wave

A high speed train travels with an average speed of 227 km/hr. The train travels for 2hrs how far does the train travel

Why does a fluid become less dense when it is heated?

The period of a simple pendulum in a grandfather clock on another planet is 1.80 s. What is the acceleration due to gravity (in m/s2) on this planet if the length of the pendulum is 1.00?

Tuition and fees, books, supplies and room and board all figure into a students?

This is a bond in which a single pair of electrons is shared between a pair of atoms