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2 years ago

Which element could not form in the sun and would have to be formed in a supernova?.

Chemistry

1 answer:

sasho [114]2 years ago

7 0

Uranium, most uranium does derive from a star. However, not from our sun.

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a student lists three temperature measurements 100 f , 100 c, and 100 k of the highest temps 100 k is the highest true or false

Archy [21]

Answer:

False, it is actually 100 kelvins

Explanation:

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3 years ago

Read 2 more answers

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madam [21]

Conducting an experiment

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3 years ago

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A chunk of tin weighing 18.5 grams and originally at 97.38 °C is dropped into an insulated cup containing 75.7 grams of water at

balandron [24]

Answer:

The final temperature of the water is 22.44°C.

Explanation:

Heat lost by tin will be equal to heat gained by the water

$-q_1=q_2$

Mass of tin = $m_1=18.5 g$

Specific heat capacity of tin = $c_1=0.21 J/g^oC$

Initial temperature of the tin = $T_1=97.38^oC$

Final temperature = $T_2$ =T

$q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2=75.7 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=21.52^oC$

Final temperature of water = $T_2$ =T

$q_2=m_2c_2\times (T-T_3)$

$-q_1=q_2$ (Law of Conservation of energy)

$-(m_1\times c_1\times (T-T_1))=m_2\times c_2\times (T-T_3)$

On substituting all values:

$-(18.5 g\times 0.21 J/g^oC\times (T-97.38^oC))=75.7 g\times 4.184 J/g^oC\times (T-21.52 ^oC)$

we get, T = 22.44°C

The final temperature of the water is 22.44°C.

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3 years ago

It is science please i need help

stellarik [79]

Geocentric-Ptolemy, Aristotle
Heliocentric- Copernicus, Galileo, heliocentric

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4 years ago

An object was placed into a container of water the arrow shows the thermal energy is flowing from the water to the object what i

posledela

Answer:

The valid conclusion is:

D. the temperature of the object is increasing, while the temperature of the water is decreasing

Explanation:

The answer choices are:

A. the temperature of the object is decreasing, while the temperature of the water is increasing
B. the temperature of the object is decreasing, while the temperature of the water is decreasing
C. the temperature of the object is increasing, while the temperature of the water is increasing
D. the temperature of the object is increasing, while the temperature of the water is decreasing

<h2>Solution</h2>

Thermal or heat energy always flows from the hotter substances to the cooler substances.

Thus, since the arrows show that the thermal energy is flowing from the water to the object, the water is losing thermal energy and the object is gaining thermal energy.

When an object gains thermal energy, and there is not involved a change of phase, the temperature of the object increases. Thus, the temperature of the object is increasing.

On the other hand, since water is losing thermal energy, and there is not involved a change of phase, the temperature of the water decreases.

Therefore, the correct conclusion is described by the option A:

A. the temperature of the object is decreasing, while the temperature of the water is increasing

3 0

3 years ago