Will give big prizes !! Can you guys explain why when mixing warm water with baking soda, it floats an object such as a grape, and when mixing cold water with baking soda, it doesn't float objects such as grapes? Does it have anything to do with particles?

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted