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oksano4ka [1.4K]
4 years ago
8

Witch is the property of matter in witch a substance can transfer heat or electricity

Physics
1 answer:
saw5 [17]4 years ago
4 0

Answer:

B. Conductivity.

Explanation:

Conductivity is the quantity of heat passing per second through a slab of unit cross-sectional area when the temperature gradient between the two faces is unity when put in heat.

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In the paralleling technique, the central ray of the x-ray beam must be _____ to the film sensor and the long axis of the tooth.
Wittaler [7]

The film sensor and the long axis of the tooth must be aligned perpendicular to the central ray of the x-ray beam when using the paralleling approach.

To find the answer, we need to know above the paralleling technique in the dental x-ray.

<h3>What is paralleling technique?</h3>
  • The paralleling technique is the most dependable method for capturing periapical x-rays because it produces high-quality images with little distortion.
  • The central x-ray beam should be pointed perpendicular to the long axis of the tooth in issue, and the film should be positioned parallel to it.
  • The paralleling technique is the most dependable method for capturing periapical x-rays because it produces high-quality images with little distortion.
  • The central x-ray beam should be pointed perpendicular to the long axis of the tooth in issue, and the film should be positioned parallel to it.
  • When preparing for an x-ray, it is imperative to keep in mind the root anatomy.
  • The maxillary occlusal plane of the patient should also be parallel to the ground.

Thus, we can conclude that, the film sensor and the long axis of the tooth must be aligned perpendicular to the central ray of the x-ray beam when using the paralleling approach.

Learn more about paralleling technique here:

brainly.com/question/28120540

#SPJ1

7 0
2 years ago
What is the direction of propagation of the wave if E⃗ =Ei^,B⃗ =−Bj^. Express the direction of the propagation vector, P⃗ , as a
nataly862011 [7]

Answer with Explanation:

We are given that

Electric field vector=\vec{E}=E\hat{i}

Magnetic field vector=\vec{B}=-B\hat{j}

We have to find the direction of propagation of the wave.

We know that  

The direction of propagation of wave=\vec{E}\times \vec{B}

The direction of propagation of wave=\hat{i}\times (-\hat{j})=-\hat{k}

Because (\hat{i}\times \hat{j}=\hat{k})

The  wave propagate in -z direction.

Therefore, the component of the vector is (0,0,-1).

Hence, the direction of the propagation of wave is - z direction and component of direction of propagation vector is (0,0,-1).

6 0
3 years ago
PLEASE PROVIDE AN EXPLANATION.<br><br> THANKS!!!
ziro4ka [17]

Answer:

(a) A = 0.0800 m, λ = 20.9 m, f = 11.9 Hz

(b) 250 m/s

(c) 1250 N

(d) Positive x-direction

(e) 6.00 m/s

(f) 0.0365 m

Explanation:

(a) The standard form of the wave is:

y = A cos ((2πf) t ± (2π/λ) x)

where A is the amplitude, f is the frequency, and λ is the wavelength.

If the x term has a positive coefficient, the wave moves to the left.

If the x term has a negative coefficient, the wave moves to the right.

Therefore:

A = 0.0800 m

2π/λ = 0.300 m⁻¹

λ = 20.9 m

2πf = 75.0 rad/s

f = 11.9 Hz

(b) Velocity is wavelength times frequency.

v = λf

v = (20.9 m) (11.9 Hz)

v = 250 m/s

(c) The tension is:

T = v²ρ

where ρ is the mass per unit length.

T = (250 m/s)² (0.0200 kg/m)

T = 1250 N

(d) The x term has a negative coefficient, so the wave moves to the right (positive x-direction).

(e) The maximum transverse speed is Aω.

(0.0800 m) (75.0 rad/s)

6.00 m/s

(f) Plug in the values and find y.

y = (0.0800 m) cos((75.0 rad/s) (2.00 s) − (0.300 m⁻¹) (1.00 m))

y = 0.0365 m

8 0
3 years ago
Read 2 more answers
Which of the following equations defines the law of conservation of energy?
Blababa [14]

Answer:

Total energy =kinetic energy +potential energy.

7 0
3 years ago
This is 100 points. When i find out how i will put the first person to answer as brainiest.
grin007 [14]

Answer:

Thank you so much! Have a great day!

3 0
3 years ago
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