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3 years ago

All BUT one statement applies to electromagnetic radiation. That is

Physics

1 answer:

koban [17]3 years ago

4 0

A) Radio waves are a form of electromagnetic radiation.

TRUE

It is the type of electromagnetic wave with least energy range and longest wavelength range among all

B) Electromagnetic radiation does not require a medium to travel.

TRUE

This radiation can travel through vacuum also and its speed is maximum in vacuum

C) In a vacuum, electromagnetic radiation travels at the speed of light.

TRUE

speed of all electromagnetic radiation is same as speed of light in vacuum

D) Electromagnetic radiation travels in the form of longitudinal waves.

FALSE

All electromagnetic radiation is always in form of transverse waves

So correct options are

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One of the largest barometers ever built was an oil-filled barometer constructed in Leicester, England in 1991. The oil had a he

ZanzabumX [31]

Answer:

ρ = 830.32 kg/m³

Explanation:

Given that

Oil head = 12.2 m

h= 12.2 m

Pressure P = 1.013 x 10⁵ Pa

Lets take density of the liquid =ρ

The pressure due to liquid P given as

P = ρ g h

Now by putting the all values in the above equation

1.013 x 10⁵ Pa = ρ x 10 x 12.2 ( take g =10 m/s²)

ρ = 830.32 kg/m³

Therefore the density of oil is 830.32 kg/m³

5 0

3 years ago

Balancing carefully, three boys inch out onto a horizontal tree branch above a pond, each planning to dive in separately. The th

VikaD [51]

Answer:

what is this a riddle lol it breaks when he either jumps or lands

Explanation:

3 0

3 years ago

Wat's the definition of microwave spectroscopy

ivann1987 [24]

Answer:

Microwave spectroscopy is the spectroscopy method that employs microwaves, i.e. electromagnetic radiation at GHz frequencies, for the study of matter

6 0

3 years ago

A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 seconds. Wha

olga55 [171]

Answer:

6m/s²

Explanation:

Given parameters:

Initial velocity = 35m/s

Final velocity = 65m/s

Time taken = 5s

Unknown:

Acceleration = ?

Solution:

Acceleration is the rate of change of velocity with time taken;

Acceleration = $\frac{Final velocity - Initial velocity }{time}$

So;

Acceleration = $\frac{65 - 35}{5}$ = 6m/s²

3 0

2 years ago

At any angular speed, a certain uniform solid sphere of diameter D has half as much rotational kinetic energy as a certain unifo

Trava [24]

Answer:

d. 6/5 M.

Explanation:

let the angular velocity = $\omega$

the radius of sphere (r) = $\frac{D}{2}$

moment of inertia of solid sphere $I_s$ = $2/5 M(\frac{D}{2})^2$

rotational K.E of solid sphere= $\frac{1}{2}* I_s* \omega ^2$

= $\frac{1}{2} * 2/5 M(\frac{D}{2})^2 * \omega^2$

we represent the mass of hallow sphere= $M_{hs}$

moment of inertia of solid sphere $I_{ss}$ = $2/3 M_{hs}(\frac{D}{2})^2$

rotational K.E of hollow sphere= $\frac{1}{2}* I_{ss} * \omega^2$

= $1/2 *2/3 M_{hs}(\frac{D}{2})^2* \omega^2$

NOW,the kinetic energy of solid sphere= 1/2 kinetic energy of hallow sphere

= $1/2 [2/5 M(D/2)^2 ]\omega^2= 1/2 (1/2 (2/3 M_{hs}(D/2)^2 )\omega^2 }$

2/5M= 1/3 $M_{hs}$

$M_{hs}$ = 3(2/5M)

$M_{hs}$ = 6/5 M

7 0

3 years ago