Neptune is a planet
a) revolves upon its axis and rotates around the sun.
b) revolves upon its axis and rotates around the milky way galaxy.
c) rotates upon its axis and revolves around the sun.
d) rotates upon its axis and revolves around the moon.

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)

The resistance of 100 w bulb is less than resistance of 40 w bulb. explain the reason.