All categories

3 years ago

Why does the heat of the heating element stop when the desired temperature in an electric iron is reached?

2 answers:

8 0

The heat of the heating element stops when the desired temperature in an electric iron is reached because A. the thermostat blade opens electrical contacts.
This is why heating ceases to rise or fall (it stops completely) once the thermostat's blade opens.

Nezavi [6.7K]3 years ago

3 0

The heat stops because the thermostat blade open the electrical contacts and current is cut off.

You might be interested in

Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 × 108 m. Find th

Veseljchak [2.6K]

Answer:

a) Find the time it took for his voice to reach the earth via radio waves.

1.28s

b) Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves.

186.6s

Explanation:

The electromagnetic spectrum is the distribution of radiation due to the different frequencies at which it radiates and its different intensities. That radiation is formed by electromagnetic waves, which are transverse waves formed by an electric field and a magnetic field perpendicular to it.

The distribution of the radiation in the electromagnetic spectrum is given in frequency, in the following order from the highest to the lower frequencies:

X-rays

Ultraviolet rays

Visible region

Infrared

Microwave

Radio waves

Light propagates as electromagnetic wave in vacuum with a speed of $3x10^{8}m/s$ . Therefore, radio waves will have the same speed in vacuum.

a) Find the time it took for his voice to reach the earth via radio waves.

Then, to know the time that it took for Neil A. Armstrong's voice to reach the Earth via radio waves from the Moon, the next equation can be used:

$c = \frac{d}{t}$ (1)

Where v is the speed of light, d is the distance and t is the time.

Notice that t can be isolated from equation 1.

$t = \frac{d}{c}$ (2)

$t = \frac{3.85x10^{8} m}{3x10^{8}m/s}$

$t = 1.28s$

Hence, it took 1.28 seconds for his voice to reach the Earth via radio waves from the Moon.

(b) Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves.

For this part, the same approach described above will be used.

For this case, $d = 5.60x10^{10}m$

$t = \frac{d}{c}$

$t = \frac{5.60x10^{10}m}{3x10^{8}m/s}$

$t = 186.6s$

Hence, the minimum time that will be required for a message from Mars to reach the earth via radio waves is 186.6 seconds.

6 0

4 years ago

Solar energy advantages and disadvantages

vazorg [7]

large solar panels are expensive

the energy it collects is 100% clean and renewable

doesn't create energy under certain weather conditions

6 0

3 years ago

A car travels 200km in the first 2.5 hours of a trip. it stops half am hour and then travels final 200km in 2 hours. find the av

aksik [14]

Answer:

total distance 400km

time 4.5

average speed is 100km

7 0

3 years ago

A 38,500 kg sphere is located 2.55 m from a 15,400 kg sphere. What is the gravitational force, rounded to the nearest thousandth

kkurt [141]

The gravitational force between the two spheres is 0.006 N

Explanation:

The magnitude of the gravitational force between two objects is given by

$F=G\frac{m_1 m_2}{r^2}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$ is the gravitational constant

$m_1, m_2$ are the masses of the two objects

r is the separation between them

For the two spheres in this problem, we have

$m_1 = 38,500 kg$

$m_2 = 15,400 kg$

r = 2.55 m

Substittuting into the equation, we find

$F=(6.67\cdot 10^{-11})\frac{(38,500)(15,400)}{2.55^2}=0.006 N$

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

#LearnwithBrainly

3 0

4 years ago

Which change in an abiotic factor causes coral bleaching? a. increased salinity b. decreased salinity c. decreased turbidity d.

Sedbober [7]

The answer is "d. increased temperature".

At the point when corals are stressed by changes in conditions, for example, temperature, light, or supplements, they remove the symbiotic algae living in their tissues, making them turn totally white. Hotter water temperatures can result in coral bleaching. At the point when water is too warm, corals will oust the algae living in their tissues, making the coral turn totally white. This is known as coral bleaching.

When a coral blanches, it isn't dead. Corals can endure a bleaching occasion, yet they are under more pressure and are liable to mortality.

7 0

3 years ago

Read 2 more answers