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3 years ago

Why are some electromagnetic waves harmful to you but others are not?

Physics

2 answers:

MariettaO [177]3 years ago

8 0

The Right Answer Is: <span>the high frequencies and shorter wavelengths penetrates body easily.</span>

larisa86 [58]3 years ago

4 0

The energy in each particle, and the penetrating ability of the radiation, and its ability to cause damage to cells in the body, grows with the frequency of the radiation.

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the air in a tire is initially at 380 kpa, 20 C, when the tire volume is 0.120 m^3. as the tire is warmed by the sun, the pressu

castortr0y [4]

Answer:

final temperature is 364.32 K

mass of air is 0.5423 kg

Explanation:

given data

pressure p1 = 380 kPa

volume v1 = 0.120 m³

temperature = 20°C = 20 + 273 = 293 K

pressure p2 = 3450 kPa

volume v2 = 5% increase

to find out

final temperature and the mass

solution

we consider here ideal gas

so equation is

p1v1 / t1 = p2v2/t2

put here all value and find t2

and v2 is = 0.120 ( 1 + 0.05) = 0.126 m³

t2 = p2v2/ p1v1 × t1

t2 = (450 × 0.126) / (380 × 0.120) × 293

t2 = 364.32 K

so final temperature is 364.32 K

and

mass = p2v2 / Rt2

here R gas constant is 0.287 kJ/kg.K

mass = (450 × 0.126) / (0.287 × 364.32 )

mass = 0.5423

so mass of air is 0.5423 kg

7 0

3 years ago

The cross sectional area of an optical fibre is 6.3 x 10^-6 m^2 The intensity of the light entering the optical fibre is 3.2 x 1

gogolik [260]

the answer is 0.0. also known as a emoji face!

7 0

3 years ago

When your peers see you doing good work, they may feel motivated themselves. What are some othe

lora16 [44]

Answer:

1. friends getting you to study

2. leading you to make the right decision

3. giving you advice pushing you towards whats right

4. pressuring you to be a good person

5. telling you when in the wrong

Explanation:

all of these are ways of positive peer pressure

4 0

3 years ago

The gravitational force between two objects is ______ proportional to the products of the masses and _______ proportional to the

Rudiy27

directly, inversely ... newton's grav eqn

6 0

3 years ago

Read 2 more answers

7. A double-slit experiment uses coherent light of wavelength 633 nm with a slit separation of 0.100 mm and a screen placed 2.0

Illusion [34]

Answer:

The distance between first-order and second-order bright fringes is 12.66mm.

Explanation:

The physicist Thomas Young establishes through its double slit experiment a relationship between the interference (constructive or destructive) of a wave, the separation between the slits, the distance between the two slits to the screen and the wavelength.

$\Lambda x = L\frac{\lambda}{d}$ (1)

Where $\Lambda x$ is the distance between two adjacent maxima, L is the distance of the screen from the slits, $\lambda$ is the wavelength and d is the separation between the slits.