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3 years ago

A coiled up wire carrying a current is called what ?

Physics

1 answer:

kvv77 [185]3 years ago

5 0

Answer:

Solenoids

Explanation:

A coil of current-carrying wire is otherwise known as a solenoid; it is often referred to as an electromagnet.

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A sound wave has a frequency of 645 Hz in air

rodikova [14]

Answer:

$-14.2^{\circ}C$

Explanation:

First of all, we can find the speed of the sound wave, which is given by:

$v=f \lambda$

where

f = 645 Hz is the frequency

$\lambda=0.5 m$ is the wavelength

Substituting,

$v=(645 Hz)(0.5 m)=322.5 m/s$

Now we can find the temperature of the air by using the following relationship:

$v = 331 m/s + 0.6 T$

where T is the temperature in Celsius degrees. Since we know v = 322.5 m/s, we can re-arrange the formula to find the temperature:

$T=\frac{v-331 m/s}{0.6}=\frac{322.5 m/s-331 m/s}{0.6}=-14.2^{\circ}C$

7 0

3 years ago

A capacitor is being charged from a battery and through a resistor of 10 kΩ. It is observed that the voltage on the capacitor ri

swat32

Answer:

$C = 2.48 \times 10^{-4} Farad$

Explanation:

As per the equation of voltage on capacitor we know that

$V = V_{max}(1 - e^{-\frac{t}{\tau}})$

now we know that voltage reached to its 80% of maximum value in 4 second time

so we will have

$0.80 V_{max} = V_{max}(1 - e^{-\frac{4}{\tau}})$

$0.20 = e^{-\frac{4}{\tau}}$

$-\frac{4}{\tau} = ln(0.20)$

$-\frac{4}{\tau} = -1.61$

$\tau = 2.48$

as we know that

$\tau = RC$

$(10 k ohm)(C) = 2.48$

$C = 2.48 \times 10^{-4} Farad$

4 0

3 years ago

In the roman soldier model for refraction, a muddy stream crosses the road they are on walking on at 45. Will the soldiers in th

Mamont248 [21]

There are different refractive errors that are common and some of them are:

Nearsightedness (myopia) makes far-away objects look blurry.
Farsightedness (hyperopia) makes nearby objects look blurry.
Astigmatism can make far-away and nearby objects look blurry or distorted.
Presbyopia makes it hard for middle-aged and older adults to see things up close

<h3>What is Refraction?</h3>

This refers to the study of light phenomena that deflects when it passes through a medium in an oblique manner to another medium of a varying density.

Hence, we can see that there are everyday examples of refraction in simple terms which occurs and some of them are:

Glass
Human eyes
Ice crystals
Pickle jar
Microscope, etc.

Hence, we can see that your question is incomplete, so I gave you a general overview to help you get a better understanding of the concept of refraction.

Read more about refraction here:

brainly.com/question/15838784

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3 0

2 years ago

What are some ways in which the temperature of a substance can be measured

Juli2301 [7.4K]

The three most normal units of estimation for temperature are Celsius, Fahrenheit, and Kelvin.

A thermometer is an instrument that measures temperature. It can gauge the temperature of a strong, for example, food, fluid like water, or gas like air.

The Celsius scale is important for the decimal measuring standard. The decimal standard of estimation additionally incorporates units of mass, like kilograms, and units of length, like kilometers. Most logical fields measure temperature utilizing the Celsius scale. Zero degrees Celsius is the edge of freezing over water, and 100 degrees Celsius is the limit of water. Three countries don't utilize the Celsius scale. The United States, Burma, and Liberia utilize the Fahrenheit scale to quantify temperature. In any case, even in these nations, researchers utilize the Celsius or kelvin scale to gauge temperature. Water freezes at 32 degrees Fahrenheit and bubbles at 212 degrees Fahrenheit. The Kelvin scale is utilized by physicists and different researchers who need to record exceptionally exact temperatures. The Kelvin scale is the main unit of estimation to incorporate the temperature for "outright zero," the complete shortfall of any intensity energy.

Learn more about Temperature: brainly.com/question/25677592

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3 0

2 years ago

A block of mass 0.454 kg is hung from a vertical spring and allowed to reach equilibrium at rest. As a result, the spring is str

zloy xaker [14]

<h2>Spring constant is 6.73 N/m</h2>

Explanation:

For a spring mass system we have

Mass x Acceleration due to gravity = Spring constant x Elongation

mg = kl

Mass, m= 0.454 kg

Acceleration due to gravity, g = 9.81 m/s²

Spring constant,k = ?

Elongation, l = 0.662 m

Substituting

0.454 x 9.81 = k x 0.662

k = 6.73 N/m

Spring constant is 6.73 N/m

4 0

4 years ago