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3 years ago

HELP ASAP. WILL GIVE BRAINLIEST.

1 answer:

3 0

The fastest thing in the whole universe is the speed of light in a vacuum. The speed is around 2.99 * $10^{8}$ . It is fastest in vacuum as vacuum does not contain any dust particles and is a hollow space so light travels faster. It also has a refractive index of 1 so it travels faster.

After vacuum light travels faster in air. Air has a refractive index of 1.0003.

After air, it travels faster in water. The speed is about 3/4 of its speed in a vacuum, or 225,000,000 meters per second. Speed slows in water because photons interact with atoms, which repeatedly absorb and re-emit them to the same direction. The refractive index of water is 1.33.

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What is the magnetic field strength, in units of microTesla (T), at a distance of 6.3 cm from a long straight wire carrying a cu

bezimeni [28]

Answer:

$2.1 \mu T$

Explanation:

The magnetic field strength is given by:

$B=\frac{\mu_0 I}{2 \pi r}$

where

$\mu_0$ is the vacuum permeability

I is the current

r is the distance from the wire

In this problem,

I = 6.5 A

r = 6.3 cm = 0.063 m

So, the magnetic field strength is

$B=\frac{(1.256\cdot 10^{-7} H/m)(6.5 A)}{2 \pi (0.063 m)}=2.1\cdot 10^{-6} T=2.1 \mu T$

7 0

3 years ago

Which characteristic must a food have to receive a “natural” label from the FDA ?

adelina 88 [10]

No artificial ingredients
i only know that because my mom was vegan for two years

4 0

3 years ago

Please help!!!!!!!!!

Inessa [10]

A, D is the correct answers

6 0

3 years ago

Explain how your battery works. (You may want to look at the Electric Current lesson) What are some possible materials you could

Lisa [10]

Answer:

A battery is made up of three parts. The Cathode (positive end +) , the Anode (negative end -) and the electrolyte. The electrolyte allows electrical charges to travel between the cathode and anode. This chemical reactions creates the flow of electricity supplying the electrical voltage potential to power a circuit.

Typical materials of a battery are as follows

- Anode most often is made of zinc

- Manganese dioxide acting as Cathode.

- the electrolyte between and inside contains ions

Explanation:

6 0

3 years ago

A type of lens that scatters or diverges lie and produces virtual images that are on the same side of the lens as the object its

ira [324]

Answer:

The concave lens is the answer.

3 0

3 years ago