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3 years ago

Most ionic bonds form when electrons from____.

Physics

2 answers:

Margarita [4]3 years ago

6 0

A bond with elements from B.

Ira Lisetskai [31]3 years ago

6 0

He answer is A! Hope this Helps!

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Which statements best describe x-rays? check all that apply. x-rays are electromagnetic waves. x-rays are longitudinal waves. x-

igor_vitrenko [27]

X ray is one of the electromagnetic waves.

As per Clark Maxwell's electromagnetic theory, all the electromagnetic waves move with the velocity of light i.e c= 3×10^8 m/s

In case of electromagnetic waves,the electric field and magnetic field are perpendicular to each other as well as perpendicular to the direction of propagation.The electromagnetic waves exhibit the property of polarisation. Hence they are transverse in nature.

Hence the best statements about X- ray will be-

1- X -rays are electromagnetic waves

2-X-rays are transverse transverse waves

3- X- rays travel at the speed of light.

3 0

3 years ago

Read 2 more answers

Which type of reactions usually happens slowest?

m_a_m_a [10]

Answer:

option b is correct..................

7 0

3 years ago

A 477 g portion of soup is heated in a microwave oven from 25°C to 90°C, using radiation with a wavelength of 1.55 × 10⁻² m. Ass

zheka24 [161]

To solve this problem we will use the heat transfer equations, to determine the amount of heat added to the body. Subsequently, through the energy ratio given by Plank, we will calculate the energy of each of the photons. The relationship between total energy and unit energy will allow us to determine the number of photons

The mass of water in the soup is 477g

The change in temperate is

$\Delta T = (90+273K)-(25+273K) = 65K$

Use the following equation to calculate the heat required to raise the temperature:

$q = mc\Delta T$

Here,

m = Mass

c = Specific Heat

$q = (477)(4.184)(65)$

$q = 129724.92J$

The wavelength of the ration used for heating is $1.55*10^{-2}m$

The number of photons required is the rate between the total energy and the energy of each proton, then

$\text{Number of photons} = \frac{\text{Total Energy}}{\text{Energy of one Photon}}$

This energy of the photon is given by the Planck's equation which say:

$E = \frac{hc}{\lambda}$

Here,

h = Plank's Constant

c = Velocity of light

$\lambda =$ Wavelength

Replacing,

$E = \frac{(6.626*10^{-34})(3*10^8)}{1.55*10^{-2}}$

$E = 1.28*10^{-23}J$

Now replacing we have,

$\text{Number of photons} = \frac{82240.7}{1.28*10^{-23}}$

$\text{Number of photons} = 6.41*10^{27}$

Therefore the number of photons required for heating is $6.41*10^{27}$

4 0

3 years ago

87) Determine the equivalent resistances for the following circuits.

stepladder [879]

Answer:

15 and 11 ohms

Explanation:

First one = For the parallel resistors 1 / (1/6 + 1/6 + 1/6) = 1/ (3/6 ) = 6/3 = 2 ohms then add the 3 and the 10 = 15 ohms

second one for the parallel portion equiv = (10+2)*24 / ( (10+2 + 24) = 8

then add the 3 in series = 11 ohms

8 0

2 years ago

An electron and a proton have the same kinetic energy and are moving at speeds much less than the speed of light. Determine the

morpeh [17]

Answer:

The ratio of the Broglie wavelength of an electron to that of the proton is 42.85.

Explanation:

let λe be the Broglie wavelength of the electron and λp be the Broglie wavelength of the proton, Me be the mass of the electron and Mp be the mass of the proton. let h be the Planck constant, Kep be the kinetic energy of the proton and KEe be the kinetic energy of the electron

4 0

3 years ago