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3 years ago

Compare a water molecule, H2O, to a carbon dioxide molecule, CO2.

Physics

1 answer:

IRINA_888 [86]3 years ago

3 0

Answer:

They are made from different types of atoms in different ways:

H2O = 2 hydrogen atoms combined with one oxygen atom

CO2 = 2 oxygen atoms combined with one carbon atom

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To test the quality of water sources in her area, Shameka collects five samples from each water source and tests the quality of

xenn [34]

The missing part of the incomplete question is given below:

Which important step of scientific design is Shameka conducting?

repetition

replication

verification of results

using controlled variables

Answer:

Verification of results

Explanation:

The way toward gathering five examples of water from various sources is conveyed to confirm the outcome. By gathering water from five distinct areas of a similar source the analyst can genuinely find out the nature of the water in her region of remain.

On the off chance that after examples are tried it is found the water isn't sound, the outcomes would be acknowledged as it has been appropriately checked and a proper move would be made.

Thus, the correct answer is - verification of results

6 0

3 years ago

A car is traveling at a constant speed on the highway. Its tires have a diameter of 68.0 cm and are rolling without sliding or s

Bad White [126]

Answer:

37.4m/s

Explanation:

since the car doesn't accelerate, we can use the formula v=ωr where v is linear speed, ω is angular speed (rads/second) and r is radius. Substitute values for equation:

v=55*0.68

v=37.40

5 0

3 years ago

An 8.0 g bullet is fired from a gun at 120 m/s into a 2.0 kg block of wood sitting on a fence post. If the bullet hits the wood

nydimaria [60]

Answer:

$v = 0.478 m/s$

Explanation:

As we know that bullet strike the block and fix in it

so here if bullet and box is taken as a system then there is no external force on it

so here the initial momentum of bullet and block must be equal to final momentum of bullet and block

so here we have

$m_1v_{1i} + m_2v_{2i} = m_1v + m_2v$

now we have

$m_1 = 8 g$

$v_1 = 120 m/s$

$m_2 = 2kg$

$v_{2i} = 0$

now from above equation we have

$(0.008)(120) + 2(0) = (0.008)v + 2v$

$v = 0.478 m/s$

8 0

4 years ago

If you wanted to find a sample of fermium, which has an atomic number of 100, where would you look?

Umnica [9.8K]

Answer:

Explanation:

Fermium is a synthetic element with the symbol Fm and atomic number 100. It is an actinide and the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared.[3] A total of 19 isotopes are known, with 257Fm being the longest-lived with a half-life of 100.5 days.

It was discovered in the debris of the first hydrogen bomb explosion in 1952, and named after Enrico Fermi, one of the pioneers of nuclear physics. Its chemistry is typical for the late actinides, with a preponderance of the +3 oxidation state but also an accessible +2 oxidation state. Owing to the small amounts of produced fermium and all of its isotopes having relatively short half-lives, there are currently no uses for it outside basic scientific research.

5 0

3 years ago

Read 2 more answers

An inductor, battery, resistance, and ammeter and switch are connected in series. If the switch, initially open, is now closed,

Tanzania [10]

The question is incomplete. Here is the complete question.

An inductor, battery, resistance and ammeter and switch are connected in series. If the switch, initially open, is now closed, what is the current's final value?

a. zero

b. Battery voltage divided by inductance

c. battery voltage times inductance

d. battery voltage divided by resistance

Answer: d. battery voltage divided by resistance

Explanation: Resistance, voltage and current are related by Ohm's Law, which is explained as the current that passes through a conductor is directly proportional to the applied voltage. The constant of proportionality between them is Resistance.

Ohm's Law is represented by $V=R.I$

Inductor is a component that stores magnetic energy when electricity is applied to it.

Ammeter is an object constructed to measure electric current of a circuit and it is always connected in serie.

So, in the circuit, when the switch is closed, the "only way" for current to pass through is because of Ohm's Law, which means its magnitude will be:

$I=\frac{V}{R}$

Then, the correct alternative is d. voltage divided by resistance.

7 0

3 years ago

**Compare a water molecule, H2O, to a carbon dioxide molecule, CO2.**

Compare a water molecule, H2O, to a carbon dioxide molecule, CO2.