Electrons move in orbits in the same way planets orbit the sun

Which of the following statements are true? 1. Liquid water expands with increasing temperature above 4°C. 2. Liquid water expands with increasing temperature between 0°C and 4°C. 3. Water contracts as it freezes at 0°C. 4.

What is the speed of a vehicle that moves 40 meters in 2 seconds

Is Salad dressing a compound?

Identify the Following as physical properties or chemical properties. A. reacts with water B. is Red C. Is Shiny and slivery D. Melts easily E. boils at 100 C F. Is non flammable G. has low density. H. tarnishes in moist air

The temperature of an object is a measure of the average thermal energy of the molecule in the object true or false

What wave-like property of light causes it to bend when encountering an opening? A. Reflection B. all the above c. Refraction d. none of the above e. diffraction

Which of the following statements describe sliding friction? Select all that apply. 1.) a force that causes an object to increase speed 2.) a force in which one of the objects involved must be a liquid or a gas 3.

What do a broken rode and a volcano eruption have in common

What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?

All of the following shows density and buoyancy except: A. ice cubes floating in a glass of iced tea B. the amount of hot soup contained in a bowl C. a hot air balloon moving through the air D. a boulder resting at the bottom of the ocean