Physics, 27.06.2019 04:30 peralesdavid34

Devon places sliced potatoes in a package of aluminum foil. he puts a metal grate over a campfire and sets the package on the grate. he warms his hands over the fire while he waits and watches the hot air carry ashes into the sky. when he removes the foil package, the grate and foil are hot, and the food is cooked. which part of this scenario represents conduction? the food cooks inside the foil. devon warms his hands over the fire. the hot air rises into the sky. the grate is hot when devon is done cooking.

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Answer from: fchadwayne9185

The correct answer is "The food cooks inside the foil".

Explanation:

In conduction , there is no actual movement of matter. Heat flows from the hotter body to the colder body but when the two bodies are placed in contact with each other.

In convection, there is a physical movement of matter.

Radiation is the emission of the energy. Heat travels through a vacuum in the radiation.

In the given problem, Devon places sliced potatoes in a package of aluminum foil. He puts a metal grate over a campfire and sets the package on the grate.

When he removes the foil package, the grate and foil are hot, and the food is cooked. Here, the heat is transferred from the campfire to the metal grate to the aluminium fire and then to the food. The metal grate and the aluminium foil are in contact with each other. Here, the conduction takes place.

Therefore, the scenario, "The food cooks inside the foil" represents the conduction from the given option.

Answer from: brapmaster764

the food makes contact with the foil wich represents conduction so the answer is A, hope this helps ( ;w;)

Explanation:

Answer from: Quest

One splits the atoms and molecules the other combines them

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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