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sukhopar [10]
3 years ago
11

Four students wrote down their descriptions of burning. Amanda: Buming is a chemical change that happens to food like strawberri

es or apples. Burning happens slower when there is more heat. Krista: Burning is a type of chemical change using fire and heat that produces new substances Buming things like wood or bread changes their color and odo Bernadette: Buming is a type of physical change that changes the color and odor of objects using fire and heat. Laura: Burning is a chemical change where objects change color, odor, and appearance. The lower the heat the faster the chemical change. Which student had the best description of burning? Amanda Krista Bemadette Laura​
Physics
1 answer:
Nuetrik [128]3 years ago
6 0

Answer:

Hey Krista: Burning is a type of chemical change using fire and heat that produces new substances "Buming"* things like wood or bread changes their color and odor

This is the best discription because it describes what things can burn and what happens to them.

*i don't know what "buming" means but i think you mean burning, lol.

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A box sliding on a horizontal floor surface starts out moving at 4.9 m/s and stops after 2 seconds. The surface and the box have a kinetic friction has friction coefficient of 0.25 (g=9.8 ms-2).

The speed of an object at the start of a measurement, or an initial state, is known as the initial speed. The ratio of distance travelled to travel time, also known as the average speed, is the sum of the initial and final speeds. The difference between initial and ending speeds is the speed change. A force that acts between moving surfaces is referred to as kinetic friction. A force acting in opposition to the direction of a moving body on the surface is felt.

Interval (t) equals 2 seconds

Kinetic friction coefficient is 0.25.

gravity-induced acceleration (g) = 9.8 m/s2.

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N = μkmg

I = (delta P) (delta P)

Vo = (0.25)(9.8)(2) (2)

Vo = 4.9m/s

Learn more about kinetic friction here

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