All categories

3 years ago

There are_____ atoms are in every living things.

1 answer:

3 0

When atoms, the basic units of chemical elements, combine into chemical compounds, they form molecules. Organisms have many different kinds of molecules, from water and simple salts to complex molecules such as carbohydrates, fats, proteins, and deoxyribonucleic acid (DNA). One protein, called hemoglobin, carries oxygen in the blood and is what makes blood red. Hemoglobin contains atoms of six different elements—carbon, hydrogen, oxygen, nitrogen, sulfur, and iron.

You might be interested in

A researcher determined the amount of electrical energy entering a neon lighted sign and compared it with the amount of light pr

andriy [413]

The best explanation of the observation of the researcher is that some of the energy is converted into thermal energy (option C).

<h3>How does energy transfer?</h3>

Energy, according to the law of conservation of energy, cannot be created nor destroyed but transformed.

According to this question, a researcher found that the amount of light energy produced in a neon lighted sign was less than the amount of electrical energy used.

This suggests that some of the energy is converted into thermal energy.

Learn more about energy at: brainly.com/question/1932868

#SPJ1

3 0

2 years ago

Which of the following is true about free energy? A. It is all the energy that a molecule contains B. The free energy change of

son4ous [18]

Free energy is a thermodynamic potential that can be used to calculate the maximum reversible work that can be performed by a thermodynamic system at a constant temperature and pressure. It is fulfilled that if the energy change is less than zero it will mean that the relationship will proceed towards the product, while if the relationship is greater than zero the reaction will proceed towards the reactant. Therefore the correct option is D.

<em>The free energy change of a reaction can determine the reaction direction</em>

3 0

3 years ago

What is the unit for distance

Yakvenalex [24]

Answer:

Meter,Miles,Kilometers

Explanation:

so on

3 0

3 years ago

Read 2 more answers

One method for determining the amount of corn in early Native American diets is the stable isotope ratio analysis (SIRA) techniq

Iteru [2.4K]

Answer:

$0.0084575\ \text{T}$

$0.272\ \text{m}$

2.2 cm easily observable

Explanation:

$m_1$ = Mass of 12 C = $1.99\times 10^{-26}\ \text{kg}$

$m_2$ = Mass of 13 C = $2.16\times 10^{-26}\ \text{kg}$

$r_1$ = Radius of 12 C = $\dfrac{25}{2}=12.5\ \text{cm}$

B = Magnetic field

v = Velocity of atom = 8.5 km/s

$r_2$ = Radius of 13 C

The force balance of the system is

$qvB=\dfrac{m_1v^2}{r}\\\Rightarrow B=\dfrac{m_1v}{rq}\\\Rightarrow B=\dfrac{1.99\times 10^{-26}\times 8500}{12.5\times 10^{-2}\times 1.6\times 10^{-19}}\\\Rightarrow B=0.0084575\ \text{T}$

The required magnetic field is $0.0084575\ \text{T}$

Radius is given by

$r=\dfrac{mv}{qB}$

$r\propto m$

$\dfrac{r_2}{r_1}=\dfrac{m_2}{m_1}\\\Rightarrow r_2=\dfrac{m_2}{m_1}r_1\\\Rightarrow r_2=\dfrac{2.16\times 10^{-26}}{1.99\times 10^{-26}}\times 12.5\times 10^{-2}\\\Rightarrow r_2=0.136\ \text{m}$

The required diameter is $2\times 0.136=0.272\ \text{m}$

Separation is given by

$2(r_2-r_1)=2(0.136-0.125)=0.022\ \text{m}$

The distance of separation is 2.2 cm which is easily observable.

5 0

3 years ago

While driving a 2150 kg car, carl steps on the gas pedal, accelerating at 4.0 m/s2. If the coefficient of friction between his c

TEA [102]

Answer:

d. 3332.5 [N]

Explanation:

To solve this problem we will use newton's second law, which tells us that the sum of forces is equal to the product of mass by acceleration.

Here we have two forces, the force that pushes the car to move forward and the friction force.

The friction force is equal to the product of the normal force by the coefficient of friction.

f = N * μ

f = (m*g) * μ

where:

N = weight of the car = 2150*9.81 = 21091.5 [N]

μ = 0.25

f = (21091.5) * 0.25

f = 5273 [N]

Now as the car is moving forward, the car wheels move clockwise. The friction force between the wheels of the car and the pavement must be counterclockwise, i.e. counterclockwise. Therefore the direction of this force is forward. This way we have:

F + f = m*a

F + 5273 = 2150*4

F = 8600 - 5273

F = 3327 [N]

Therefore the answer is d.

4 0

4 years ago