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4 years ago

Mechiancal weathering includes all of these except a.)ice b.)plants c.)animals d.)wind

Chemistry

1 answer:

Nana76 [90]4 years ago

7 0

The answer is D. Wind

Wind is considered physical weathering

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train travel from hong kong to beijing it traveled at an average speed of 160 km/m in the first 4 hours. after that it traveled

Nonamiya [84]

Answer:

7 hours

Explanation: step 1. 160x4=640

step 2. 1180-640=540

step 3. 540÷180=3

step 4. 3+4=7

5 0

4 years ago

Read 2 more answers

What would the percentage of thorium-232 (parent compound) be in a rock that was dated at 2.8 billions years?

just olya [345]

The half-life of Th-232 is 1.405 × 10¹⁰ years

Time elapsed = 2.8 x 10⁹ years

Equation of radioactive decay:

A = A₀ = (1/2)^ t/t₁/₂

where A₀ is the initial amount, A is the amount after time t, t₁/₂ is the half file

The fraction of thorium-232 that remains in the rock after 2.8 billions years is,

A/A₀ = (1/2) ^ (2.8 x 10⁹/ 1.405 × 10¹⁰) = 0.871

Therefore, the percentage of thorium-232 in the rock that was dated at 2.8 billions year = 87.1%

5 0

4 years ago

If I have 4.5 liters of gas at a temperature of 33 0C and a pressure of 6.54 atm, what will be the pressure of the gas if I rais

Nikitich [7]

This is an exercise in the general or combined gas law.

To start solving this exercise, we must obtain the following data:

V₁ = 4.5 l
T₁ = 33 °C + 273 = 306 k
P₁ = 6.54 atm
T₂ = 94 °C + 273 = 367 k
V₂ = 2.3 l
P₂ = ¿?

We use the following formula:

P₁V₁T₂ = P₂V₂T₁ ⇒ General Formula

Where

P₁ = Initial pressure
V₁ = Initial volume
T₂ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₁ = Initial temperature

We clear the general formula for the final pressure.

$\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{P_{1}V_{1}T_{2} }{V_{2}T_{1}} \ \to \ Clear \ formula \end{gathered}$}$

We solve by substituting our data in the formula:

$\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{(6.54 \ atm)(4.5 \not{l})(367 \not{K}) }{(2.3 \not{l})(306 \not{k})} \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{10800.81}{ 703.8 } \ atm \end{gathered}$}$

$\boxed{\large\displaystyle\text{$\begin{gathered}\sf P_{2}=15.346 \ atm \end{gathered}$} }$

If I raise the temperature to 94°C and decrease the volume to 2.3 liters, the pressure of the gas will be 15,346 atm.

8 0

2 years ago

Read 2 more answers

Give three examples of why the cell cycle is important!!

ElenaW [278]

1. Cell division prevents cell from becoming too large
2. It’s the way cells reproduce so you can grow and heal injuries
3. There are more cells and they are smaller which means they will be more efficient

3 0

4 years ago

Is hydrogen a molecule or compound

Ainat [17]

It is a molecule because hydrogen is an element.
An element is made up of molecules

7 0

3 years ago

Mechiancal weathering includes all of these except a.)ice b.)plants c.)animals d.)wind​

Mechiancal weathering includes all of these except a.)ice b.)plants c.)animals d.)wind