Which of the following bodies has a brightness that surpasses Venus’? My options are Jupiter, Mars, the stars, and the Moon. Jupiter and mars are obviously out and Venus is brighter than all the stars in the sky (besides the sun lol) so it would be the moon right? just a lil confused.

btw i'm not sure what subject to post this in since there's no astronomy subject.

Answers

Answer 1

Answer:

Answer: the Moon.

Explanation:

Brightness of celestial object is given in terms of magnitude. Apparent magnitude reflects how bright an object appears from the Earth. The apparent magnitude of the Moon is (-12.7 )greater than the apparent magnitude of the Venus (-4.4). The more negative value, the brighter is the object. Thus, the brightness of the moon surpasses the brightness of Venus.

Answer 2

Answer: Hi there!

The answer would be the stars. Since the sun is a star, the star is the answer. A star is much, much hotter than Venus, making it much brighter.

Hope this helps!

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Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. True False

Answers

Answer:

False

Explanation:

When solutions of different concentration are placed, separated by a semipermeable membrane, the molecules pass from the solution with the lowest concentration of solutes to the one with the highest concentration. This generates a pressure difference on both sides of the semipermeable membrane, called osmotic pressure.

Final answer:

Osmotic pressure is created by the presence of small diffusible molecules that easily move through the capillary membrane. It draws fluid back into the capillaries, opposing hydrostatic pressure.

Explanation:

Osmotic pressure is created by the presence of small diffusible molecules that move through the capillary membrane. It is determined by osmotic concentration gradients, which are the differences in solute-to-water concentrations between the blood and tissue fluid. Osmotic pressure draws fluid back into the capillaries, opposing the hydrostatic pressure that forces fluid out of the capillary.

Osmotic pressure is created by the presence of small diffusible molecules that easily move through the capillary membrane. It draws fluid back into the capillaries, opposing hydrostatic pressure.

Learn more about osmotic pressure here:

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In a coffee-cup calorimeter experiment, 10.00 g of a soluble ionic compound was added to the calorimeter contained 75.0 g H2O initially at 23.2°C. The final temperature of the solution was 31.8°C. What was the change in enthalpy for the dissolution of this compound?

Answers

Answer:

The enthalpy for dissolution is - 305.558 J/g

Solution:

Mass of the ionic compound, m = 10.00 g

Mass of water, m' = 75.0 g

Initial temperature, T = $23.2^(\circ)C$

Final Temperature, T' = $31.8^(\circ)C$

Now,

To calculate the change in enthalpy:

We know that the specific heat of water is 4.18 $J/g^(\circ)C$

Total mass of the solution, M = m + m' = 10.00 + 75.0 = 85.0 g

Temperature, difference, $\Delta T = T' - T = 31.8 - 23.2 = 8.6^(\circ)C$

Thus

The heat absorbed by the solution is given by:

$Q = MC_(w)\Delta T = 85.0* 4.18* 8.6 = 3055.58\ J$

Enthalpy, $\Delta H = -(Q)/(m) = - (3055.58)/(10) = - 305.558\ J/g$

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Icebergs are colder then the ocean water and cold water is more dense then salt water.

Answers

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Answers

Answer

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Explanation

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In a 4*100m relay race,tota track length is 200m and time taken by one particular group is 50.2sec. ehat is the average speed and average velocity of that group?plzzzz help mee

Answers

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Answers

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