At what speed do electromagnetic waves travel?

Answers

Answer 1
Answer: The speed the electromagnetic waves travel is up to 10 x 3^8 s/m through the process of less than c. Hope this helps
Answer 2
Answer: The speed of light in the vacuum has an exact value of 299 792 458 -meters per second given by the federal bureau of units so before deleting answers mods, go check what people say! It has been set to a whole number because the meter had been defined to be the distance travelled by light in 1/299792458 seconds

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Which of the following statements about ice melting is true and why?A. Energy flows from the ice to its surroundings.
B. Water molecules move from their fixed position.
C. Water molecules lose energy.
D. The temperature of the ice increases as it melts.

Answers

The answer for this question is part B that is Water molecules move from their fixed position.


This is because when water is freeze it is in a solid condition that means the molecules are held together tightly and are are vibrating in their fixed positions.


As soon as the molecules gain energy they start to move around from their fixed positions and turn into a liquid.


In the process of doing so ice melts and becomes water.

option(D) is true
the ice molecules are taking in heat from its surroundings to melt and form water.This increases the temperature of ice as it melts.
option(c) can also be true because to form water,the intermolecular force between the molecules gets weak which allows them to move from their fixed point.

In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 4.32 x 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.07 x 103 m/s, and the magnitude of the earth's magnetic field at the location of the wire was 5.81 x 10-5 T. If the wire had moved perpendicular to the earth's magnetic field, what would have been the motional emf generated between the ends of the wire

Answers

"When The motional emf generated between the ends of the wire is e = 17745.1 V".

What is Motional emf generated?

When Motional EMFs in the Earth’s weak magnetic occupation are not ordinarily very large, we would notice voltage along metal rods, Than such as a screwdriver, during ordinary motions. For illustration, a simple computation of the motional emf of a 1 m rod moving at 3. 0 m/s perpendiculars to the Earth’s field gives emf is = Bℓv

Then Length, l is = 4.32 x 10^4 m

Then speed, v is = 7.07 x 10^3 m/s

Now the magnetic field, B is = 5.81 x 10^-5 T

Now, The formula for the motion emf is given by

e is = B x v x l

e is = 5.81 x 10^-5 x 7.07 x 10^3 x 4.32 x 10^4

Therefore, e = 17745.1 V

Find more information about Motional emf generated here:

brainly.com/question/14311882

Answer:

Explanation:

Length, l = 4.32 x 10^4 m

speed, v = 7.07 x 10^3 m/s

magnetic field, B = 5.81 x 10^-5 T

The formula for the motion emf is given by

e = B x v x l

e = 5.81 x 10^-5 x 7.07 x 10^3 x 4.32 x 10^4

e = 17745.1 V

Match these terms with the correct examples.1. liquid solution
2. gaseous solution
3. compound
4. colloid
5. element
a. oceans
b. clouds
c. oxygen
d. air
e. water

Answers

Answer:

           1) Liquid solution: Oceans

            2) Gaseous Solution: Air

            3) Compound:  Water

            4) Colloid: Cloud

            5) Element: Oxygen

Explanation:

                        Solutions are those mixtures which have uniform composition. The size of solute is around 1 Angstrom hence, the particles of solutes can not be seen and the interactions make the overall solution transparent.

                        Compounds are those substances which are formed chemically by the reaction of two different elements like,

                                       O₂  +  2 H₂    →    2 H₂O

                        Colloids are also mixtures but these are intermediate between true solutions and suspensions. Also, the solute size is greater than that of solute size in solutions and is about 10 Angstrom. Examples include Clouds, Fog, Moist, Aerosol sprays e.t.c.

                        Elements are those substances which either are made up of single atoms like noble gases or are molecules made up of same elements like O₂, H₂, Cl₂, N₂ e.t.c.

Use other awnser this one was wrong

Density is calculated by dividing the mass of an object by its volume. Please select the best answer from the choices provided T F

Answers

From among the choices suggested, the better answer is the letter ' T ' ...
the letter that can call to mind the words 'tactful', 'tested', 'tasteful', triumphant',
and 'true', depending on the context.

The description of 'density' in the first sentence is a good and correct one.

Who is the president of kenya​

Answers

Question:

Who is the president of Kenya?

Answer:

Uhuru Kenyatta

Answer:

Uhuru Muigai Kenyatta

Explanation:

He was born on 26 October 1961.

He is a Kenyan politician, businessman, and the fourth and current President of the Republic of Kenya.

A box of groceries requires 5.0 newtons of force to lift it up 1.0 meter. How much work is done?

Answers

Work is defined as the amount of force done multiplied by the distance it was applied. Since it is already given that the object of interest (a box of groceries) was lifted up 1 meter by a force of 5 newtons, work done can be solved using the following formula:

Work = Force * distance
Work = 5 N * 1 meter
Work = 5 N*m = 5 J