Can a physical change, change what a substance is? Explain your answer by giving an example.

Two identical strings, A and B, have nearly the samtension. When they both vibrate in their fundamental resonantmodes, ther is a beat of 3Hz. When string B is tightenedslightly, to increase the tension, the beat frequency becomes 6 Hz. This means.

A particle of mass 7.4 * 10-8 kg and charge + 8.6 μC is traveling due east. It enters perpendicularly a magnetic field whose magnitude is 3.2 T.

The average speed of sound in water is 1500 m/s. how long would it take a sound wave to travel 9000 m? your answer

A student of Physics applies a constant force of 25Newtons while lifting a heavy Physics book up into the air a distance of 2.0meters. How much Work does the student do on the book? 1) 0joules, because gravity pulled down on the book 2) 5.

Lymph ducts are more similar to arteries than veins. A. True B. False

Who were the 26 or 27 scientists that found the elements on the periodic table?

What particle is used as a beam to treat cancer

Heat engine x has an efficiency of 67%. heat engine y has an efficiency of 82%. which best compares these two heat engines?

How far away is venus from the sun

Absolute differences between each observed mass and the accepted value, divided by the accepted value, multiplied by 100%