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3 years ago

Electric fields and magnetic fields often occur together true or false

Physics

2 answers:

Law Incorporation [45]3 years ago

6 0

Answer:true

Explanation:

Svet_ta [14]3 years ago

3 0

TRUE
They propagate perpendicular to each other in the case of an Electromagnetic waves....
Both can be seen in the case of a moving charge

Hope this helps!

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A. Atoms can bond together in several different ways. Name three types of chemical bonding. Explain what happens to electrons in

rewona [7]

Explanation:

a) Three types of chemical bondings:

Ionic bonding: Complete transfer of electrons from an electropositive atom to an electronegative atom.
Covalent bonding: Equal sharing of electrons between the atoms with less or zero electronegativity difference.
Metallic bonding: The bonding between the conduction electrons(electron cloud of delocalised electrons) and positively charged metal ions

b) Those elements are named as Noble gases which inert in nature that is less reactive due to fully filled electronic configuration.

Their general electronic configuration is given by:

$ns^2np^6$

n = principle quantum number

c) In an ionic bonding, electrons are transferred to the electronegative atom from the electropositive atom.

Electronegative: An atom which gains an electrons.Negative charge carrying ion is formed.

Electropositive : An atom which looses electrons.Positive charge carrying ion is formed.

d) This because the band width between the conduction band and valence band is large due to which electrons will not able to jump from valence band to conduction band.This makes the non metal poor electrical conductors.

8 0

3 years ago

Read 2 more answers

The swinging pendulum has 10 joules of potential energy at its maximum height at points (1) and (5). If the mass of the pendulum

SVEN [57.7K]

The speed of the pendulum at point 3 is 1.4 m/s

Explanation:

We can solve this problem by using the law of conservation of energy. In fact, the mechanical energy of the pendulum (which is the sum of his potential energy + his kinetic energy) must be conserved. So we can write:

$U_1 +K_1 = U_3 + K_3$

where

$U_1$ is the initial potential energy, at the highest position

$K_1$ is the initial kinetic energy, at the highest position

$U_3$ is the final potential energy, at the lowest position

$K_3$ is the final kinetic energy, at the lowest position

We are told that:

$U_1 = 10 J$ is the potential energy of the pendulum at the maximum height

$K_1 = 0$ (when the pendulum is at maximum height, the speed is zero, so the kinetic energy is zero)

$U_3 = 0$ (potential energy is zero at the lowest position)

Therefore,

$K_3 = U_1 = 10 J$

Kinetic energy can be rewritten as

$K_3 = \frac{1}{2}mv^2$

where

m = 10 kg is the mass of the pendulum

v is its speed at point 3

Solving for v,

$v=\sqrt{\frac{2K_3}{m}}=\sqrt{\frac{2(10)}{10}}=1.4 m/s$

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

4 0

3 years ago

Ber [7]

Answer:

Explanation:

I think you got it right

3 0

3 years ago

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Gamma rays are used to _____.

Ipatiy [6.2K]

d. check pipes for cracks or rust

The answer above is correct.

Gamma rays are primarily used in the medical field to kill cancer cells and examine the body's internal structures.

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3 years ago

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An engine has an energy input of 125 J, and 35 J of that energy is transformed into useful energy. What is the efficiency of the

xeze [42]

The efficiency of the engine at the given useful energy and input energy is 28%.

The given parameters:

Input energy of the engine, = 125 J
Useful energy of the engine, 35 J

The efficiency of the engine is defined as the ratio of the output energy (useful energy) to the input energy and it is calculated as follows;

$efficiency\ = \frac{0ut put \ energy}{1nput \ energy} \times \ 100\%\\\\efficiency\ = \frac{35}{125} \times 100\%\\\\efficiency\ = 28 \ \%$

Thus, the efficiency of the engine at the given useful energy and input energy is 28%.

Learn more about efficiency of engine here: brainly.com/question/6751595

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2 years ago