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Monica [59]
2 years ago
5

Why isn't there a lunar eclipse every time Earth is in between the sun and the Moon?

Chemistry
1 answer:
DerKrebs [107]2 years ago
8 0
Because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.
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Uranium-238 decays very slowly.its half-life is 4.47 billion years.
coldgirl [10]
13.4 billion years is 3 times of the half-life, 4.47 billion years. So the Uranium-238 will go through three times of half decay. So the remain percentage will be 50%*50%*50%=12.5%.
6 0
2 years ago
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What does Q=mcdeltaT stand for ?
AVprozaik [17]
Its a formula relating to specific heat capacity

Δθ refers to the change in temperature

Q refers to the energy neededto raise the temperature of an object by the change in temperature

m stands for the mass of tje object

c is the specific heat capacity which is the amount of energy needed to heat up an object per unit mass
4 0
2 years ago
If a student mixes 75 mL of 1.30 M HNO3 and 150 mL of 6.5 M NaOH. is the final solution acidic, basic, or neutral
raketka [301]

Answer:

The solution is basic.

Explanation:

We can determine the nature of the solution via determining which has the large no. of millimoles (acid or base):

  • If no. of millimoles of acid > that of base; the solution is acidic.
  • If no. of millimoles of acid = that of base; the solution is neutral.
  • If no. of millimoles of acid < that of base; the solution is basic.

  • We need to calculate the no. of millimoles of acid and base:

no. of millimoles of acid (HNO₃) = MV = (1.3 M)(75.0 mL) = 97.5 mmol.

no. of millimoles of base (NaOH) = MV = (6.5 M)(150.0 mL) = 975.0 mmol.

<em>∴ The no. of millimoles of base (NaOH) is larger by 10 times than the acid (HNO₃).</em>

<em>So, the solution is: basic.</em>

4 0
2 years ago
The formula for speed (S) is S=D/T where S is speed, D is distance and T is time.
sergij07 [2.7K]
Not 100% sure but I think 40 seconds
4 0
3 years ago
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In a plant, roots absorb water and nutrients. Those materials are then transported to other parts of the plant. Which statements
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I would say A and C. The circulatory system moves blood and nutrients similar to the plant moving water and nutrients. The endocrine system is responsible for hormones, glands and other such functions.
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2 years ago
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