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3 years ago

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14. Looking ahead: Give an example of how the Law of Conservation of Energy applies to eating your favorite meal. Give at least

2 energy transformations.(5 pts)

1 answer:

Alexxandr [17]3 years ago

8 0

Answer:

The law of conservation of energy applies to eating your favorite food in that the energy contained in the food is being converted to energy usable for the body system after the final digestion(Glucose or simple sugar, amino acid, etc)

Examples of transformation of energy include

(1) Transformation from Chemical energy in battery to light energy in bulb

(2) Transformation of Electrical energy to thermal/Heat energy in electric stove.

Explanation:

The law of conservation of energy states that energy can neither be created or distroy. It can only by converted from one form to another.

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The energy of atoms and molecules in an object due to their motion is_______ energy

QveST [7]

I think the answer is potential

7 0

3 years ago

In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested travelin

alexandr402 [8]

Answer:

a) $v=0.999124c$

b) $E=7.566*10^{22}$

c) $E_a=760 times\ larger$

Explanation:

From the question we are told that

Distance to Betelgeuse $d_b=430ly$

Mass of Rocket $M_r=20000$

Total Time in years traveled $T_d=36years$

Total energy used by the United States in the year 2000 $E_{2000}=1.0*10^20$

Generally the equation of speed of rocket v mathematically given by

$v=\frac{2d}{\triangle t}$

$v=860ly/ \triangle t$

where

$\triangle t=\frac{\triangle t'}{(\sqrt{1-860/ \triangle t)^2}}$

$\triangle t=\frac{36}{(\sqrt{1-860/ \triangle t)^2}}$

$\triangle t=\sqrt{(860)^2+(36)^2}$

$\triangle t=860.7532$

Therefore

$v=\frac{860ly}{ 860.7532}$

$v=0.999124c$

b)

Generally the equation of the energy E required to attain prior speed mathematically given by

$E=\frac{1}{\sqrt{1-(v/c)^2} }-1(20000kg)(3*10^8m/s)^2$

$E=7.566*10^{22}$

c)Generally the equation of the energy $E_a$ required to accelerate the rocket mathematically given by

$E_a=\frac{E}{E_{2000}}$

$E_a=\frac{7.566*10^{22}}{1.0*10^{20}}$

$E_a=760 times\ larger$

8 0

3 years ago

Name of compounds<br>a. H2Co3<br>b. NH4OH<br>c.AlPO4<br>d.NaOH<br>e.AuCI3<br>

seraphim [82]

Answer:

<em><u>a) </u></em><em><u> </u></em><em><u>Carbonic acid</u></em>

<em><u>b</u></em><em><u>)</u></em><em><u> </u></em><em><u>ammonium hydroxide</u></em>

<em><u>c</u></em><em><u>)</u></em><em><u> </u></em><em><u>Aluminum phosphate</u></em>

<em><u>d</u></em><em><u>)</u></em><em><u> </u></em><em><u>Sodium hydroxide</u></em>

<em><u>e</u></em><em><u>)</u></em><em><u> </u></em><em><u>Gold trichloride</u></em>

Explanation:

<em>I</em><em> </em><em>hope this</em><em> </em><em>will help</em><em> </em><em>you</em><em> </em><em>buddy</em><em> </em>

3 0

3 years ago

Any of two or more forms of the same element which differ only in the number of neutrons their atoms contain is called an

telo118 [61]

C. isotope

Isotopes have the same atomic number but different mass number because of the difference in the number of neutrons in the nucleus of the atom.

8 0

3 years ago

This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The mag

sweet-ann [11.9K]

Answer:

Explanation:

Given

coefficient of kinetic friction $(\mu _k)$ =0.34

inclination $\theta =44$

weight of block=51 N

(a) When block is moving upward friction force acts downward

thus

$Fsin\theta -W-f_r=0$

as block is moving with constant velocity thus $F_{net}$ is zero

$f_r=\mu _kN=0.34\times Fcos\theta$

$F\left ( \sin \theta -\mu \cos \theta \right )=W$

$F=\frac{51}{0.45}=113.31 N$

(b)When Block slides down the wall friction changes its direction to oppose the block

$Fsin\theta -W+f_r=0$

$F\left ( \sin \theta +\mu \cos \theta \right )=W$

$F=\frac{W}{\left ( \sin \theta +\mu \cos \theta \right )}$

$F=\frac{51}{0.939}=54.299 N$

3 0

4 years ago