The pitch of the siren of a moving fire truck changes from high to low as the fire truck passesby. What property of sound wave changes as the fire truck goes by?

Which describes how a microwave transfers heat to leftover mashed potatoes? radiation excites the motions of water molecules in the food, raising their total kinetic energy the hot oven comes in contact with the cold food and heat is transferred

What is the molas mass of lithium oxide li2o

1. a car is traveling 60 miles per hours on cruise control. what is the net force? 2. an object of mass 10kg is accelerated upward at 2m/s^2. what force is required? 3. what is the mass of an object if a force of 17n causes it to accelerate at 1.

The two covalent bonds in a water molecule are polar because a. oxygen is more electronegative than hydrogen. b. oxygen and hydrogen have similar electronegativities. c. oxygen is less electronegative than hydrogen. d. water is a small molecule. e.

Identify some acids that are found in everyday materials. Lemon juice baking soda dish detergent vinegar hand soap

How can hypothesis best be tested

Write a balanced equation for the combustion of 1 mol of C4H10O (l). Express your answer as a chemical equation. Identify all of the phases in your answer.

A thermonuclear chain reaction is considered to be a: -sustaining reaction in which the products cause new reactions fusion reaction because new material is combined many times }common phenomenon for all unstable uranium atoms proton creation

Which atoms are most likely to form covalent bonds?

Which phrase is the best description of weathering? A-Compacting Rocks B-Cementing Rocks Together C-Crystallizing to form minerals D-Breaking Rocks into fragments by physical or chemical means