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3 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!

You might be interested in

How do you do these?

Agata [3.3K]

Solve these problems like weighted averages:

The first one:

Multiply the masses (isotope numbers) by the decimal form of the percentage. Add them

0.076 (6) + 0.924 (7) = 6.924

The second one:

0.2 (10) + 0.8 (11) = 10.8

If you think about it, these answers make sense. 6.924 is much closer to 7 than to 6 (since there's a lot more lithium-7 than there is lithium-6). 10.8 is closer to 11 than to 10.

6 0

2 years ago

6. A. If 4.50 mols of ethane, C2H6, undergoes combustion according to the unbalanced equation

uranmaximum [27]

Answer:

for one mole of C2H6 there are 7/2 mole of O2 required. so for4. 50 moles you require 4.50 x 7/2 = 15.75 moles of O2.

Explanation:

i hope it's helpful

6 0

2 years ago

How many grams of KCN are in 10.0 ml of a 0.10 M solution?

attashe74 [19]

Explanation:

As it is known that molarity is the number of moles present in a liter of solution.

Mathematically, Molarity = $\frac{no. of moles}{Volume in liter}$

As it is given that molarity is 0.10 M and volume is 10.0 ml. As 1 ml equals 0.001 L. Therefore, 10.0 ml will also be equal to 0.01 L.

Hence, putting these values into the above formula as follows.

Molarity = $\frac{no. of moles}{Volume in liter}$

0.10 M = $\frac{no. of moles}{0.01 L}$

no. of moles = 0.001 mol

As molar mass of KCN is equal to 65.12 g/mol. Therefore, calculate the mass of KCN as follows.

No. of moles = $\frac{mass}{molar mass}$

0.001 mol = $\frac{mass}{65.12 g/mol}$

mass = 0.06152 g

Thus, we can conclude that 0.06152 grams of KCN are in 10.0 ml of a 0.10 M solution.

3 0

3 years ago

When a substance condensed, what happens to the mass? (4 points)

kogti [31]

I think it 's B hope it helps

4 0

2 years ago

'Let this cup pass from you, eh?'

LuckyWell [14K]

Answer:

“'Let this cup pass from you, eh? '” This quote is an allusion to Christ in the Garden of Gethsemane before he is crucified. ... This quote alludes to Hitler who is the Nazi ruler in Germany.

6 0

2 years ago