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3 years ago

Explain the energy transformation that must occur for your body to participate in a physical activity, such as playing a sport.

Chemistry

1 answer:

yanalaym [24]3 years ago

3 0

Answer:

an example is an athlete has stored chemical energy in their body like fats and sugars then the stored chemical energy turns into kinetic energy as they run down the track.

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Which group of elements are considered to be in the same family?

mash [69]

A. helium, neon and argon, because they are in the same group or column

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2 years ago

Barium and lead both produce yellow precipitate with the chromate ion as part of their confirmation tests. if you had a sample t

UkoKoshka [18]

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2 years ago

Read 2 more answers

When sodium peroxide is added to water, sodium hydroxide and oxygen gas is produced.

lukranit [14]

Answer:

The reaction combines the sodium with the hydrogen and oxygen in water to form sodium hydroxide and hydrogen gas, and you get a lot of energy released as heat as well. This heat actually melts any remaining sodium that has not reacted yet, and ignites the hydrogen gas, so you get the bang and the flash.

Explanation:

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2 years ago

How would you classify raisin bran?

Nostrana [21]

Pure substance element I think

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3 years ago

What is the specific heat capacity of an unknown metal if 75.00 g of the metal absorbs 418.6J of heat and the temperature rises

EleoNora [17]

Answer:

The specific heat capacity of the unknown metal is 0.223 $\frac{J}{g*C}$

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Q= 418.6 J
c= ?
m= 75 g
ΔT= 25 C

Replacing:

418.6 J= c* 75 g* 25 C

Solving:

$c=\frac{418.6 J}{75 g*25 C}$

c= 0.223 $\frac{J}{g*C}$

The specific heat capacity of the unknown metal is 0.223 $\frac{J}{g*C}$

3 0

2 years ago