um can someone just help me with the first question so I have an idea of what to do...please

Answer:

b)sugar and water : Sedementation

d) salt and water : evaporation

Answer:

B. melting of ice caps

Explanation:

Answer: B) The half-life of Co-57 is 10 days

D) After twenty days have elapsed, about 25% of the Co-57 remains.

E) Scientists have an 8 gram sample of Co-57. After thirty days, 1 gram remains.

Explanation:

Answer:

Freezing of water

Explanation:

When water becomes a solid it releases heat into its surroundings (warming it up).

Answer:

i think the second answer " fish migration might be prevented" might possibly be your answer

Answer:

Pitch:it refers to the highest and lowness of a sound.

Wavelength: It is the distance measured from one crest to another, or from one trough to another.

Refraction of Light: The light bends as it travels from one medium to another.

Reflection of Light: It happens when light bounces back after hitting a well-polished surface.

Crest: The highest point of the wave from the center.

I hope this helps! :)

Answer:

orange

0.8

Explanation:

On egde

Acturus which is a star   with surface temperature 4290 K is orange in color and has a mass of 0.8 kilograms.

A star is an astronomical object comprising a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the  eye at night, but their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names.

Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated 1022 to 1024 stars.A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements.

Learn more about star,here:

https://brainly.com/question/7379319

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Answer:

You may experience the sudden onset of one or more symptoms, such as: Numbness, tingling, weakness, or inability to move a part or all of one side of the body (paralysis). Dimness, blurring, double vision, or loss of vision in one or both eyes. Loss of speech, trouble talking, or trouble understanding speech.

Answer:

Stress, infection and changes in your blood's fluid and electrolyte balance can also influence hormone levels.

Explanation:

Answer: During a phase change, such as melting or boiling, the kinetic energy increases.

Explanation:

Kinetic energy is the energy obtained by the molecules of a substance due to their motion.

When phase change such as melting or boiling takes place then it means heat is absorbed by the substance. As a result, their molecules more even more rapidly from one place to another due to which more number of collisions take place.

Hence, a change in phase of substance occurs as kinetic energy increases in melting or boiling process.

Thus, we can conclude that during a phase change, such as melting or boiling, the kinetic energy increases.

In Newton's 2nd law, written in terms of force, mass and acceleration, m stands for the mass in the original Newton's work, i.e. the quantity of the substance which makes up a material body.

Have a great day/ night hope this helped out <33

Answer:

tttttttttttthankkssss!!!!!

Answer:

I dont understand what is the question you need help on-

Explanation:

Answer:

Yes, oil is a non renewable energy source

Explanation:

Because once these resources are used up, they cannot be replaced.

Answer:

yes its a nonrenewable resource because once you use it you cant put it back

Explanation:

Answer:

214

Explanation:

Q=mco

Q=heat

M is mass

C is specific heat

O is increased in temperature

Answer: the answer is 35.6

Explanation:

Look up the answer but take out you must show all your work and resources should pop up I’m on the same question now for chemistry so I’m putting 35.6L

Answer:

The moons gravitational pull on Earth

Answer:

tundra swam,sea duck and herbivorous swan

Answer:

0.0898M is the molarity of the basic solution

Explanation:

The reaction of calcium hydroxide, Ca(OH)₂ with H₃PO₄ is:

3 Ca(OH)₂ + 2 H₃PO₄ → 6H₂O + Ca₃(PO₄)₂

To solve this question we must find the moles of H3PO4 that react. With the moles and the rection we can find the moles of Ca(OH)2. Using its volume we can find its molarity:

Moles H3PO4:

0.0189L * (0.200mol / L) = 0.00378 moles H3PO4

Moles Ca(OH)2:

0.00378 moles H3PO4 * (3mol Ca(OH)2 / 2mol H3PO4) = 0.00567 moles Ca(OH)2

Molarity:

0.00567 moles Ca(OH)2 / 0.06315L =

Answer: a unicellular organism & plant or animal

Explanation: a organism is any unicellular plant, animal or single celled life form.

a unicellular organism and a plant or an animal

Answer:

lets be honest

Explanation:

no one knows and this is worthless to answer for the worth of 5 points

Answer:

The deuterium-tritium (DT, Figure 2) reaction is the most useful for fusion energy because it most easily overcomes the Coulomb repulsion, and it has the highest energy release among laboratory-feasible reactions.

Explanation:

When a deuterium nucleus (2H) and a tritium nucleus (3H) combine, the result is a helium nucleus and a very energetic neutron. Under the right circumstances, the energy released is sufficient to induce further fusion reactions.

880.209 kilojoules of heat are required to heat 2550 grams of water from 17.5°C to 100.0°C.

The amount of energy released or absorbed by a substance can be calculated using the following expression:

Q = m × c × ∆T

where;

According to this question;

Q = 2550 × 4.184 × 82.5

Q = 880,209J

Q = 880.209kJ.

Therefore, 880.209 kilojoules of heat are required to heat 2550 grams of water from 17.5°C to 100.0°C.

Learn more about how to calculate heat at: https://brainly.com/question/2530523

Answer:

43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.

Explanation:

Ideal gas law is:

PV = nRT

Where P is pressure in atm

V is volume = 4.00L

n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):

500g * (1mol / 70.90g) = 7.052 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 25°C + 273 = 298K

To solve the pressure, P:

P = nRT/V

P = 7.052mol*0.082atmL/molK*298K / 4.00L

P = 43.1atm is the pressure using gas law.

Van der Waals equation is:

[tex]P + a(\frac{n}{V})^2 * (V-nb) = nRT[/tex]

Where a is 6.58L²atm*mol⁻²

b = 0.056Lmol⁻²

Solving for pressure:

[tex]P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}[/tex]

[tex]P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2[/tex]

[tex]P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2[/tex]

P = 172.323 / 3.6051 - 20.4866

P = 27.2atm using Van der Waals Law

Answer: 6

Explanation: 2*3=6

zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius)