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4 years ago

For which of the following is the velocity constant (speed/direction does not change)?

1 answer:

5 0

The answer is D. Velocity has a direction and a magnitude, so to have a constant velocity, none of them should be changing. A seems right at first, but when the cat climbs up a tree, it's changing directions. B says the cat slows down which means there's a change in velocity and acceleration is present. C says that the cat's running around in circles so it's constantly changing directions. D is the only right one because the magnitude of velocity (speed) is 0 and not changing neither is the direction.

Hope this makes sense!

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How do you get from mass to moles in this problem?

Zinaida [17]

Answer:

what problem?

8 0

4 years ago

Help please ill give a free thanks WHATEVER just help Bryan is doing a triathlon and you need to calculate his average speed for

serg [7]

Answer:

thermal conductor

Explanation:

4 0

3 years ago

For a single H2 molecule, H2 → 2H, the dissociation energy is 4.52 eV. How much energy would have to be put in (in kJ) to dissoc

grandymaker [24]

Answer: 7.2418 x 10^-19 joules

Explanation:

1 eV equals 1.602 x 10^-19 joules

Then 4.52eV will be multiplied by the above value to give 7.2418 x 10^-19 joules which is the energy required to dissociate the hydrogen molecule

6 0

3 years ago

given that the mean relating atomic mass of chlorine gas is 35.5 and contains a mixture of two isotopes of mass number 35 and 37

bezimeni [28]

The abundance of isotope 35 = 75%

The abundance of isotope 37 = 25%

Ratio isotope 35 : isotope 37 = 3 : 1

<h3>Further explanation</h3>

Given

Ar Cl = 35.5

Two isotopes of mass number 35 and 37

Required

The ratio of each isotope

Solution

If the abundance of isotope 35 is x%, then the abundance of isotope 37 is (100-x)%

35.5 = x%.35 + (100-x)%.37

35.5 = 0.35x+0.37(100-x)

35.5=0.35x-0.37x+37

0.02x=1.5

x=75

5 0

3 years ago

A balloon at 30.0°C has a volume of 222 mL. If the temperature is increased to 56.1°C and the pressure remains constant, what wi

svp [43]

Answer:

<em>415.15 mL</em>

Explanation:

To solve the statement, you can use the law of Charles - Gay Lussac, which states that "<em><u>the volume of gas is directly proportional to its temperature at constant pressure</u></em>." Mathematically:

$\frac{V1}{T1} = \frac{V2}{T2} = Constant$

You can calculate the volume V₂ Clearing it from the equation and replacing the values granted by the statement to perform the calculation:

V₂ = V₁ x T₂ / T₁ = 222 mL x 56.1 ° C / 30.0 ° C = 415.15 mL

Therefore, <em>the gas at 56.1 ° C will occupy a volume of 415.15 mL</em>

7 0

3 years ago