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3 years ago

In its elemental state, carbon is available as:

Physics

2 answers:

stich3 [128]3 years ago

8 0

I believe the answer is coal

vaieri [72.5K]3 years ago

5 0

Answer: D all of the above

Explanation: Coal, Graphite, Diamond are all allotropes of Carbon. Hope this helps :)

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Why are some forces considered to be noncontact forces? A. Objects must be far apart in order to exert a force. B. Objects do no

kompoz [17]

Answer:

B. Objects do not have to touch each other to experience a force.

Explanation:

For example ..One of the noncontact forces is magnetic force whereby a magnetic object will be attracted to another magnetic object of oppsite charged particles, through waves called electromagnetic waves. On the other hand, the two magnetic objects of similar charged particles can repel through electromagnetic waves..

8 0

3 years ago

A 2.50-m segment of wire carries 1000 A current and feels a 4.00-N repulsive force from a parallel wire 5.00 cm away. What is th

Stolb23 [73]

Answer:

The current is $I_b = 400 \ A$

Explanation:

From the question we are told that

The length of the segment is $l = 2.50 \ m$

The current is $I_a = 1000 \ A$

The force felt is $F = 4.0 \ N$

The distance of the second wire is $d = 5.0 \ cm = 0.05 \ m$

Generally the current on the second wire is mathematically represented as

$I_b = \frac{2 \pi * r * F }{ l * \mu_o * I_a }$

Here $\mu_o$ is the permeability of free space with value $\mu_o = 4 \pi * 10^{-7} \ N/A^2$

=> $I_b = \frac{2 * 3.142 * 0.05 * 4 }{ 2.50 * 4\pi *10^{-7} * 1000 }$

=> $I_b = 400 \ A$

4 0

3 years ago

what relationship must exist between an applied force and the velocity of a moving obkect if uniform circular motion is to resul

Leona [35]

Answer:

See explanation

Explanation:

The centripetal force keeps an object moving in a circular orbit at constant velocity. The velocity of an object undergoing uniform motion is always tangential to the circle while the centripetal force is directed towards the center of the circle.

This now implies that the direction of the force acting on a body undergoing circular motion at constant velocity is perpendicular to the direction in which the object is being displaced.

5 0

3 years ago

During the internal examination, the pathologist drains the intestines, removes any undigested food and feces,and examines the c

DanielleElmas [232]

During the internal examination, the pathologist drains the intestines, removes any undigested food and feces, and examines the contents of the stomach. This examination could give the pathologist clues of the time of death, and the location of death. The process of digesting and defecation vary from person to person, the entire process is generally considered to take approximately 40 hours in adults

8 0

3 years ago

In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being

Sati [7]

Answer:

r = 0.5297 m

Explanation:

In this exercise we use Newton's second law where the force is magnetic

F = ma

centripetal acceleration

a = v² / r

F = q v x B = q v B sin θ

where the angle between the velocity and the magnetic field is 90º, therefore the sin 90 = 1

we substitute

q v B= m v² / r

r = $\frac{m v^2 }{qv B}$

the mass of each isotope is

12C

m12 = 6 m_proton + 6 m_neutrons

m12 = (6 1,673 +6 1,675) 10⁻²⁷

m12 = 20.088 10-27 kg

14C

m14 = 6 m_proton + 8 m_neutron

m14 = (6 1,673 + 8 1,675) 10-27

m14 = 23,438 10⁻²⁷ kg

in the exercise they indicate that the velocity of the two particles is the same, therefore with the initial data we can calculate the parameters that do not change in the experiment.

$\frac{v}{qB} = \frac{r}{m_{12}}$

v / qB = 0.454 / 20.088 10⁻²⁷

v / qb = 2.26 10²⁵

this quantity remains constant, let's use the other data to calculate the radius

r = 23.438 10⁻²⁷ 2.26 10²⁵

r = 5.297 10⁻¹ m

r = 0.5297 m

7 0

3 years ago