The speed of sound in air is about 340 meters per second. How long does it take a sound wave to travel a distance of 7800 meters

Which of the following statements is true of acceleration? A. Acceleration always has the same sign as displacement. B. Acceleration always has the same sign as velocity. C.

3 A wave that forms a stationary pattern in which portions of the wave do not move and other portions move with a large amplitude

How does the sun cause wind

General relativity, rather than special relativity, must be used for which kind of frame of reference A. Frame of reference moving backward at constant velocity B. Frame of reference that is accelerating C. A frame of reference that is at rest D.

Vx = 20 m/s, vy = 43 m/s. Find the vector's magnitude.

Explain what each of the following scientists contribute to the atomic theory

A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Do the following quantities increase, decrease, or stay the same? Select one or more: a. delta V increases b.

Energy is observed in two basic forms: potential and kinetic. Which of the following correctly matches these forms with a source of energy? a. the heat released from a living organism: potential energy b.

What should you do when operating a boat in large waves and high wind?

A planetary nebula forms when the outer layers are expelled from which type of star?