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3 years ago

Which of the following is a characteristic of science?

Physics

2 answers:

vfiekz [6]3 years ago

7 0

Answer:

Using controlled conditions

Explanation:

Science experiments and tests are always carried out using specific conditions and parameters. These can be pressure, temperature, volume or the close surrounding around us which determines a 'tentative' results. The environment or the surrounding in which the tests are run plays a very important role and it has large affect on the result of the experiment. Thus these scientific experiment are carried at controlled conditions to obtain the desired results.

Thus the answer is, Using controlled conditions.

Oksi-84 [34.3K]3 years ago

6 0

Answer:

C. Using controlled conditions

Explanation:

I did the quiz and B turned out to be wrong. D just doesn't make sense. Although A can be true in some experiments, it's not always the case.

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What mass of ice (in g) can be melted if 27.2 kJ of thermal energy are added at the freezing point? Use molar mass = 18.02 g/mol

san4es73 [151]

Answer : The mass of ice melted can be, 3.98 grams.

Explanation :

First we have to calculate the moles of ice.

$Q=\frac{\Delta H}{n}$

where,

Q = energy absorbed = 27.2 kJ

$\Delta H$ = enthalpy of fusion of ice = 6.01 kJ/mol

n = moles = ?

Now put all the given values in the above expression, we get:

$27.2kJ=\frac{6.01kJ/mol}{n}$

$n=0.221mol$

Now we have to calculate the mass of ice.

$\text{Mass of ice}=\text{Moles of ice}\times \text{Molar mass of ice}$

Molar mass of ice = 18.02 g/mol

$\text{Mass of ice}=0.221mol\times 18.02g/mol=3.98g$

Thus, the mass of ice melted can be, 3.98 grams.

3 0

3 years ago

A coin is dropped. What is its displacement after 0.30 s.

Morgarella [4.7K]

Assuming this coin is on earth and that it wasn’t dropped forcefully:
Use the formula d = 1/2at^2. Rewriting using a=g and solving for height h gets us h = 1/2(9.8)t^2.
In this case that would get that the change in height h is 0.5(9.8)(0.3^2) = 0.441 m.

3 0

2 years ago

Globalization is the process of

Delvig [45]

Answer: Globalization is the process of interaction and integration among people, companies, and governments worldwide.

Explanation:

5 0

3 years ago

Read 2 more answers

Qué representa el lanzamiento vertical ascendente

rusak2 [61]

Answer:

Uhhhhh? can u explains? lol

6 0

2 years ago

A 1.00 x 104 W electric motor is used to lift a

Alexus [3.1K]

Answer: 52%

Explanation:

1W = 1 J/s

motor input is 10000 J/s

Potential energy change

PE = 955(9.81)(25.0) = 234,213.75

power needed to change the PE in that time

P = 234,213.75/ 45 = 5,204.75 Watts

motor is 5204.75 / 10000 = 0.520475 or 52% efficient

4 0

2 years ago