PLZ HELP MEON Y TEST IF U HELLP ME ON MY TEST ILL GIVE U BRAINLET How are sound waves similar to light waves?
Sound and light waves travel at the same speeds.
Sound and light are forms of energy that travel in waves.
Sound waves and light are both electromagnetic waves.
Sound waves and light are both compression waves

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?