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3 years ago

Explain applications

Physics

1 answer:

hoa [83]3 years ago

3 0

Answer:

See explanation

Explanation:

MRI: Magnetic resonance imaging (MRI) is a modern medical imaging technique that have proven to be invaluable in radiology because it is used to obtain pictures of the anatomy and the physiological processes of the human body. MRI scanners make use of strong magnetic fields and radio waves to obtain images of the target organs of the human body.

X-Ray: X-ray is an electromagnetic wave. It is used in medicine to examine the body in order to locate broken bones and metallic objects like bullets. It is used to detect flaws in metal castings and in airports to detect metals in baggage. It is used to investigate the structure of crystals as well as in cancer treatment.

Ultrasound: In medicine, the applications of ultrasound may be surgical, therapeutic, or diagnostic. Also, It is used to detect defects, flaws, cracks in machine parts, bridges and buildings.

Infrared Radiation : Infrared thermal-imaging cameras can be used to take pictures even in the dark. It is very useful in heat sensing. Lastly, it is used in chemistry to study chemical bonds.

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ben walks 2 m from his desk to the teachers desk. From the teachers desk he then walks 3 m in the same direction to the classroo

vaieri [72.5K]

Distance is the total length covered = 2m + 3m = 5m

Displacement is his distance from original position.

Displacement = 2m + (-3)m. Representing the 3m walked back as -3.

Displacement = 2m - 3m = -1m.

So his displacement is 1m behind his original starting point.

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3 years ago

In a generator, as the magnet spins, opposite poles of the magnet push the electrons in opposite directions. This back-and-forth

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3 years ago

Read 2 more answers

Each year, an average person in the United States is exposed to a radiation level of _____.

Anna11 [10]

Answer:

The correct answer is 0,2 rems

Explanation:

People are exposed to natural sources of radiation all the time. According to recent estimates, the average person in the United States receives an effective dose of approximately 3 mSv per year of natural radiation, which is equivalent to 0.3 rems. This amount includes cosmic radiation from outer space and is average because it varies depending on the region people are in.

The amount of radiation for a chest x-ray of an adult (0.01 rems) is approximately equal to 10 days of natural radiation to which we are all exposed every day.

Have a nice day!

3 0

3 years ago

How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 40.0°C greater th

ella [17]

Answer:

19.68 × 10⁻³ m

Explanation:

Given;

Original Length, L₁ = 41.0 m

Temperature Change, ΔT = 40.0°C

Thermal Linear expansion of steel is given to be, ∝ $_{steel}$ = 12 × 10⁻⁶ /°C

Generally, Linear expansivity is expressed as;

∝ = ΔL / L₁ΔT

Where

∝ is the Linear expansivity

ΔL is the change in length, L₂ - L₁

L₂ is the final length

L₁ is the original length

ΔT is the change in temperature θ₂ - θ₁ (Final Temperature - Initial Temperature)

From equation of linear expansivity

ΔL = ∝ $_{steel}$ L₁ΔT

ΔL = 12 × 10⁻⁶ /°C × 41.0 m × 40.0 °C

ΔL = 19.68 × 10⁻³ m

ΔL = 19.68 mm

8 0

3 years ago

The Jurassic Park ride at Universal Studios theme park drops 25.6 m straight down essentially from rest. Find the time for the d

ankoles [38]

Answer:

V=22.4m/s;T=2.29s

Explanation:

We will use two formulas in order to solve this problem. To determine the velocity at the bottom we can use potential and kinetic energy to solve for the velocity and use the uniformly accelerated displacement formula:

$mgh=\frac{1}{2}mv^{2}\\\\X= V_{0}t-\frac{gt^{2}}{2}$

Solving for velocity using equation 1:

$mgh=\frac{1}{2}mv^{2} \\\\gh=\frac{v^{2}}{2}\\\\\sqrt{2gh}=v\\\\v=\sqrt{2*9.8\frac{m}{s^2}*25.6m}=22.4\frac{m}{s}$

Solving for time in equation 2:

$-25.6m = 0\frac{m}{s}t-\frac{9.8\frac{m}{s^{2}}t^{2}}{2}\\\\-51.2m=-9.8\frac{m}{s^{2}}t^{2}\\\\t=\sqrt{\frac{51.2m}{9.8\frac{m}{s^{2}}}}=2.29s$

7 0

3 years ago