Which of these signals the beginning of fall

When sound waves travel through a medium, the particles of the medium move parallel to the wave motion. which type of wave displays this behavior? a. longitudinal wavesb) transverse wavesc) perpendicular wavesd) electromagnetic waves

What is the wavelength of the third harmonic in a tube of length L that has a closed end?

Which of the following occurs when light is reflected from a rough or unpolished surface?

How is a magnetic field generated?

How much work is done when a very large force is applied to an object but doe what is the work done on a 34-N weight if it is lifted up 1 km

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?

How Long will it take a plane flying north from Miami to reach New York City 1800 km away if the average velocity of the plane is 940 km/h

If vector A = 5.5N NE and vector B = 10m N 30° W, what is the vector product of A*B

Which is the best desciption of a molecule?