Identify two factors that determine the intensity of sound

Air flows upward in the wick of a lantern because of the liquid property called

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?