A siren produces waves in the air. If the frequency of the waves is gradually decreasing which of the following changes to the waves is most likely occurring?

Two 50-g ice cubes are dropped into 200 g of water in a glass. If the water was initially at a temperature of 25 oC, and if the ice came directly from a freezer operating at a temperature of - 15 oC, what will be the final temperature of the drink?

What type of measurement is indicated by km

Sally needs 50 candy bars to put in her goodie bags for her party. She already has 3 candy bars at home. Each box of candy bars at the store has 8 bar

a 4m long straight wir that carries acurrent of 0.5A is placed perpendicular to a uniform magnetic field. if the size of magnetic deflection force is 0.4N, then what is the strength of magbetic field?

When a psychologist claims that developmental processes occur rapidly and are marked by distinct periods, the psychologist most likely supports which theories of development? A. stable B. stage C. continuity D. fluid

How many earth years does it take mars to orbit the sun

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are