A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?
.
The size of the solid has rapidly decreased
The color of the solution has not changed.
The solid has bubbles forming on its surface.
The temperature of the solution stays the same.

Four objects are being tested to see how they are affected by fluid friction. object w has a surface area of 4.5 cm2, object x has a surface area of 2.5 cm2, object y has a surface area of 6.2 cm2, and object z has a surface area of 3 cm2. which object would experience the most fluid friction?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.