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3 years ago

10

A ball is thrown upward as shown. Gravity pulls (accelerates) the ball back down. Which of the following statements is true?

2 answers:

vaieri [72.5K]3 years ago

8 0

Answer:velocity is positive

acceleration negative?

Explanation:

liraira [26]3 years ago

4 0

Answer:

I think third one is the right answer

Explanation:

if it is right please mark me as brainliest

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Electromagnetic waves consist of

sineoko [7]

Electromagnetic consists of both electrical and magnetic fields so D. :)

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3 years ago

Balance the chemical equation <br> FeS2+O2——>Fe2O3+SO2

Vikki [24]

Answer:

that is the answer

Explanation:

the atoms in each side of the equation must be equal.

6 0

3 years ago

Why did Aristotle disagree with Democritus

nikklg [1K]

Answer: He theorized that all material bodies are made up of indivisibly small “atoms.” Aristotle famously rejected atomism in On Generation and Corruption. Aristotle refused to believe that the whole of reality is reducible to a system of atoms.

Explanation:

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3 years ago

The standard free-energy change for this reaction in the direction written is 23.8 kJ/mol. The concentrationsof the three interm

Natali [406]

Answer: The actual free-energy change for the reaction -8.64 kJ/mol.

Explanation:

The given reaction is as follows.

Fructose 1,6-bisphosphate $\rightleftharpoons$ Glyceraldehyde 3-phosphate + DHAP

For the given reaction, $\Delta G^{o}$ is 23.8 kJ/mol.

As we know that,

$\Delta G = \Delta G^{o} + RT ln Q$

Here, R = 8.314 J/mol K, T = $37^{o} C$

= (37 + 273) K

= 310.15 K

Fructose 1,6-bisphosphate = $1.4 \times 10^{-5}$ M

Glyceraldehyde 3-phosphate = $3 \times 10^{-6}$ M

DHAP = $1.6 \times 10^{-5}$ M

Expression for reaction quotient of this reaction is as follows.

Reaction quotient = $\frac{[DHAP][\text{glyceraldehyde 3-phosphate}]}{[/text{Fructose 1,6-bisphosphate}]}$

Q = $\frac{1.6 \times 10^{-5} \times 3 \times 10^{-6}}{1.4 \times 10^{-5}}$

= $3.428 \times 10^{-6}$

Now, we will calculate the value of $\Delta G$ as follows.

$\Delta G = \Delta G^{o} + RT ln Q$

= $23800 + 8.314 \times 310.15 \times ln(3.428 \times 10^{-6})$

= -8647.73 J/mol

= -8.64 kJ/mol

Thus, we can conclude that the actual free-energy change for the reaction -8.64 kJ/mol.

7 0

3 years ago

Which of the following groups of elements are likely to have substances that have both metal and non-metallic properties?

Tom [10]

Answer : Group 14 elements are likely to have substances that have both metal and non-metallic properties.

Explanation :

Metalloid : It is a type of element whose properties lies in between the metals and non-metals.

There are commonly six metalloids : Boron(group 13), Silicon & Germanium(group 14), Arsenic & Antimony(group 15), Tellurium(group 16).

Properties of Metalloids :

Metalloids look like metals but behave largely like non-metals.
Metalloids are solid, brittle and lustrous.
Metalloids has ability to conduct electricity.

Therefore, Group 14 elements are likely to have substances that have both metal and non-metallic properties.

4 0

3 years ago

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