a tungsten and coil has a resistance of 12 ohm at 15 degree celsius is the temperature coefficient of resistance of tungsten is 0.004 calculate the equal resistance at 80 degree Celsius​

Answers

Answer 1

Answer:

The resistance of the tungsten coil at 80 degrees Celsius is 15.12 ohm

Explanation:

The given parameters are;

The resistance of the tungsten coil at 15 degrees Celsius = 12 ohm

The temperature coefficient of resistance of tungsten = 0.004/°C

The resistance of the tungsten coil at 80 degrees Celsius is found using the following relation;

R₂ = R₁·[1 + α·(t₂ - t₁)]

Where;

R₁ = The resistance at the initial  temperature = 12 ohm

R₂ = The resistance of tungsten at the final temperature

t₁ = The initial temperature = 15 degrees Celsius

t₂ = The final temperature = 80 degrees Celsius

α = temperature coefficient of resistance of tungsten = 0.004/°C

Therefore, we have;

R₂ = 12×[1 + 0.004×(80 - 15)] = 15.12 ohm

The resistance of the tungsten coil at 80 degrees Celsius = 15.12 ohm.


Related Questions

A ball of moist clay falls 17.3 m to the ground. It is in contact with the ground for 24.0 ms before stopping. (a) What is the average acceleration of

Answers

Answer:

Acceleration,  [tex]767.08\ m/s^2[/tex]

Explanation:

Given that,

Height from a ball falls the ground, h = 17.3 m

It is in contact with the ground for 24.0 ms before stopping.

We need to find the average acceleration the ball during the time it is in contact with the ground.

Firstly, find the velocity when it reached the ground. So,

[tex]v^2=u^2+2ah[/tex]

u = initial velocity=0 m/s

a = acceleration=g

[tex]v=\sqrt{2gh} \\\\v=\sqrt{2\times 9.8\times 17.3} \\\\v=18.41\ m/s[/tex]

It is in negative direction, u = -18.41 m/s

Let a is average acceleration of the ball. Consider, v = and u = -18.41 m/s.

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{0-18.41}{24\times 10^{-3}}\\\\a=767.08\ m/s^2[/tex]

So, the average acceleration of the ball during the time it is in contact is [tex]767.08\ m/s^2[/tex].

The purpose of the sport called flight archery is to shoot an arrow the greatest possible distance. One of the greatest distances achieved in flight archery is 624 m. What would this distance be in centimeters?

Answers

Answer:

62400 cm

Explanation:

1 m = 100 cm

624m = 62 400 cm

Kim took 5 hours to complete a journey with an average speed
of 80 km/h. For the first 3 hours, she travelled at an average
speed of 60 km/h. What was her average speed for the
remaining time of the journey?
km

Answers

Answer:110

Explanation:

Which transformation of energy occurs when a fan is turned on and the blades start to rotate?

Answers

Answer:

kinetic energy

Explanation:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator

How does the moon’s diameter compare with the distance between earth and the moon

Answers

The Moon's diameter is 1/110 the distance between Earth and the Moon. ... The sun's diameter is 1/110 the distance between Earth and the Sun.

suppose you use three different scales to weigh bag of oranges one scale says the bag weighs 2.1 lbs a second says it weighs 2.2 lbs and a third says it weighs 2.1 lbs the actual weight of the bag of oranges is 2.153 lbs which of the following best describes the results?

Answers

Answer:

It would be 2.2 if you have to round the five to the one but if your not rounding the number, it'd be 2.1.

Explanation:

What is a common misconception/mistake made when calculating the final velocity for a falling object

Answers

Answer:

Velocity (v) can be calculated via v = gt, where g represents the acceleration due to gravity and t represents time in free fall. Furthermore, the distance traveled by a falling object (d) is calculated via d = 0.5gt^2.

If the force of gravity _____ the weight of an object will ______.

A. Decrease, increase
B. Increase, increase.
C. Increase, stay the same D. Decrease, stay the same

Answers

Answer:

the answer is c

Explanation:

because if the force of gravity increases its not gonna change its weight it will just float

Answer:

B

Explanation:

Weight is the amount of force gravity is exerting on something, so if gravity's force increases, weight would increase as well

If a system is maintained at a pressure of 2 psi of vacuum, what is the pressure in psia (lbs per square inch absolute)

Answers

Answer:

The absolute pressure of the system is 12.7 psia.

Explanation:

Let suppose that system works at an atmospheric pressure of 14.7 psia, the absolute pressure is equal to the atmospheric pressure minus vaccum pressure, that is:

[tex]p_{abs} = p_{atm} - p_{vac}[/tex]

Where:

[tex]p_{abs}[/tex] - Absolute pressure, measured in pounds per square inch.

[tex]p_{atm}[/tex] - Atmospheric pressure, measured in pounds per square inch.

[tex]p_{vac}[/tex] - Vacuum pressure, measured in pounds per square inch.

Given that [tex]p_{atm} = 14.7\,psia[/tex] and [tex]p_{vac} = 2\,psia[/tex], the absolute pressure of the system is:

[tex]p_{abs} = 14.7\,psia-2\,psia[/tex]

[tex]p_{abs} = 12.7\,psia[/tex]

The absolute pressure of the system is 12.7 psia.

Really easy it's physics.

Answers

I think it’s B because we aren’t looking for Vf
B is the correct answer

a person runs 27.0km west then turns around and runs 13.0km east what's the distance and displacement ?

Answers

Answer:

See below

Explanation:

Distance = 27 + 13 = 40 km

Displacement = 27 - 13 = 14 km

What is science? Science is observable, testable, replicable, reliable and flexible.

Answers

Answer:

Yes, the answer to the question is correct

Answer:

Here's what I know, As scientist discovered that Science is the method of learning everything about the natural world.

but your answer is quite correct above(◕ᴗ◕✿)

Li and Raj are playing football. They take turns trying to run past each other with the football. Li weighs 125 pound and Raj weighs 175 pounds. Li discovers that if he changes direction quickly when running, he can always dodge out of the way before Raj can tackle him.

Answers

Complete question is;

Li and Raj are playing football. They take turns trying to run past each other with the football. Li weighs 125 pound and Raj weighs 175 pounds. Li discovers that if he changes direction quickly when running, he can always dodge out of the way before Raj can tackle him.

Why is Li able to avoid Raj’s tackle? Choose the best description.

A) Raj has more mass and therefore more inertia, so he can change his motion more easily than Li.

B) Raj has more mass and therefore less inertia, so he can change his motion more easily than Li.

C) Li has less mass and therefore more inertia, so he can change his motion more easily than Raj.

D) Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Answer:

Option D - Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

From Newton's first law of motion which is known as law of inertia, an object will remain at rest or continue in constant motion unless an external force acts upon it. This means that Inertia is simply the resistance of an object to any change in its state of rest or motion.

This means that the larger the mass of the object, the more resistance the object will have from an external force. Similarly, the smaller the object, the less resistance it will have from an external force.

Therefore, we can see that larger mass means larger resistance and in turn larger inertia while smaller mass denotes smaller resistance and in turn smaller inertia.

Now, from the question,Li weighs 125 pound and Raj weighs 175 pounds. So, Li has lesser mass than Raj, and so he also has less inertia. Thus, he can change his motion more easily than Raj due to that.

Answer:

Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

i did the test

why are coal,nuclear,oil,and natural gas determined to be non-renewable types of energy resources ​

Answers

Answer:

Once used as a energy source they cannot be charged/used again.

Explanation:

16. Which of these provides most of the oxygen in Earth's
atmosphere?

coral reefs
rainforest plants
ocean phytoplankton
continental grasslands

Answers

Answer:

Ocean phytoplankton

Explanation:

The sea and ocean creates oxygen from the plants (sea creatures) that exist there. These plants generate oxygen when used as a-product of photosynthesis, a mechanism that transforms carbon dioxide through sunlight into carbohydrates that the body(plants) can use for nutrition.

A student observes that for the same net force heavier objects accelerate less which statement describes the correct conclusion?

There is a negative correlation between mass and acceleration.

An increase in acceleration causes the mass to increase.

A decrease in acceleration causes the mass to increase.

There is a positive correlation between mass and acceleration

Answers

Answer: A decrease in acceleration causes the mass to increase.

Explanation:

Let's rewrite this as:

"For a constant force F, we can see that heavier objects accelerate less"

Then, as the mass increases, the acceleration of the object decreases.

This is known as an inverse relationship between acceleration and mass.

By second Newton's law we have that:

F = m*a

Force equals mass times acceleration.

So if the force is constant, we can write it as:

a = F/m.

In this equation, we can see that, if the acceleration decreases and F remains constant, then the mass m must increase (because it is in the denominator)

Then the correct option is:

A decrease in acceleration causes the mass to increase.

Answer:

There is a negative correlation between mass and acceleration.

Explanation:

Facundo is wrong. I got this wrong thanks to Facundo!

Three. Grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance

Answers

Complete question is;

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance. Which statement can be known about the behavior of the atoms in each container?

A) The atoms in the solid would be moving vigorously around the container.

B) The atoms in the liquid would be vibrating in position.

C) The atoms in the solid would be vibrating in position.

D) The atoms in the gas would be moving slowly around the container.

Answer:

Option C - The atoms in the solid would be vibrating in position

Explanation:

Option A is wrong because the molecules in solids are held together by strong inter molecular forces and therefore can't move about freely but instead will vibrate in their position.

Option B is wrong because the atoms in liquid are more free than those in solids. Thus they will not have room to vibrate.

Option C is correct from the explanation from option A.

Option D is wrong because the atom of the gas would be very loose and free and would therefore be moving very fast around the container

Its c okay I was tryna help and u delete my question

Does a free falling object fall 2 meters in twice the time as it falls 1 meter?
a. Yes, it takes twice as long to fall twice as far. b. Yes, it takes longer to fall farther.
c. No, since it is speeding up as it falls it will cover the same distance in a shorter time.
d. No, it takes the same time since it does not accelerate.

Answers

A free-falling object has a consrant force acting on it . . .  the force of gravity, or what technical experts refer to as its "weight".

Since the object has a constant force acting on it, it must constantly accelerate according to Newton's 2nd law of motion. The way this acceleration reveals itself, the object's speed is constantly increasing.

Since the object is speeding up as it falls, there are a few weird things that happen:

 --  It will fall 2 meters in less than double the time for 1 meter.

 --  It will fall 3 meters in less than triple the time for 1 meter.

 --  It will fall 4 meters in less than quadruple the time for 1 meter, and less than double the time for 2 meters.

 --  It will fall 1 meter near the bottom in less time than 1 meter near the top.

None of the choices exactly answers the question.

Choices ' a ' and ' d ' are false statements.

Choice-b is a true statement, but it isn't a "Yes".

Choice-c  is kind of confused, but is probably the one you should select.

Three quarterbacks challenged each other to a throwing competition. They want to see who can throw the ball the furthest. What SI unit would be most appropriate to measure the competition? Question 1 options: Celsius Gram Meter Liter

Answers

Answer:

Meter

Explanation:

The competition between the three quarterbacks is with respect to how far the ball would be thrown by each person, which is the distance covered by the ball. The thrown ball is an example of projectile, which would move over a certain distance.

With respect to the measure to be used in the competition, the appropriate SI unit is meter. This is the measure of length or distance covered.

Jon was happily riding his bike at a velocity of 12 m/s North, he soon realized he was late and increased his velocity to 24nm/s in the same direction in 6 seconds. What was his acceleration?

Answers

Answer:

2 m/s^2

Explanation:

acceleration formula: a=(v-v0)/t

a=(24-12)/6=2

A glass plate 2.25 mm thick, with an index of refraction of 1.80, is placed between a point source of light with wavelength 620 nm (in vacuum) and a screen. The distance from source to screen is 1.50 cm. How many wavelengths are there between the source and the screen?

Answers

Answer:

There are 2.71x10⁴ wavelengths between the source and the screen.

Explanation:

The number of wavelengths (N) can be calculated as follows:

[tex] N = \frac{d_{g}}{\lambda_{g}} + \frac{d_{a}}{\lambda_{a}} [/tex]    

Where:

[tex]d_{g}[/tex]: is the distance in glass = 2.25 mm

[tex]d_{a}[/tex]: is the distance in air = 1.50 cm - 0.225 cm = 1.275 cm

[tex]\lambda_{g}[/tex]: is the wavelength in glass

[tex]\lambda_{a}[/tex]: is the wavelength in air = 620 nm

To find the wavelength in glass we need to use the following equation:

[tex] n_{g}*\lambda_{g} = n_{a}*\lambda_{a} [/tex]

Where:

[tex]n_{g}[/tex]: is the refraction index of glass = 1.80

[tex]n_{a}[/tex]: is the refraction index of air = 1

[tex] \lambda_{g} = \frac{\lambda_{a}}{n_{g}} = \frac{620 nm}{1.80} = 344.4 nm [/tex]

Hence, the number of wavelengths is:

[tex] N = \frac{d_{g}}{\lambda_{g}} + \frac{d_{a}}{\lambda_{a}} [/tex]

[tex] N = \frac{2.25 \cdot 10^{-3} m}{344.4 \cdot 10^{-9} m} + \frac{1.275 \cdot 10^{-2} m}{620 \cdot 10^{-9} m} [/tex]                                    

[tex] N = 2.71 \cdot 10^{4} [/tex]

Therefore, there are 2.71x10⁴ wavelengths between the source and the screen.

I hope it helps you!

Do you think all substances can change into a solid,liquid or gas?

Answers

Answer:In short yes in long

Explanation:yes all substances can exist in any of these three states. In addition to existing in one of the three states, matter can also undergo a change of state. A change of state occurs when matter is converted from one state to another state for example when a liquid is converted to a gas or a solid is converted to a liquid.

Social science is a branch of science that deals with the nature of
A. human society
B. the physical world
C. animal societies
D. the medical field
Please select the best answer from the choices provided
А
B

Answers

The physical world animal society is part of the physical world human society is a part of the physical world the medical field really doesn’t have anything to do with social science

Which steps can you take to help a person suffering from achohol abuse?

Answers

Answer:

Call a treatment service. Seek out a healthcare professional. Lastly, report the issue to the local authorities.

Why did I choose these?

You call the treatment services to take care of the person.

You seek out a healthcare professional to get him/her back in shape.

Then you report the issue so that nobody will be endangered by the person that is abusing alcohol. Many accidents occur because of this and that is why you report it.

Explanation:

why is it wrong to say a single object all alone is moving

Answers

Answer:

It is wrong to say that "a single object all alone is moving" simply because it goes against Newton's law of inertia.

Explanation:

From Newton's law of inertia, it states that: An object at rest or in constant motion will continue in it's present state unless it is acted upon by an external force.

Which means that a single object by itself cannot move anywhere unless it is acted upon by an external force..

Thus, it is wrong to say that "a single object all alone is moving" simply because it goes against Newton's law of inertia.

A whale swims at a constant speed of 8m/s for 17s what distance did it travel

Answers

We have,

Speed = 8 m/s

Time = 17 seconds

Now,

Speed = Distance/Time

★ Substituting the values in the above formula,we get:

⇒ 8 = Distance/17

⇒ Distance = 8 × 17

⇒ Distance = 136 m

Hence,the distance covered by a whale is 136 m .

3.
In some countries, pedestrians attach reflective strips to their clothes or bags when they walk
outside during the night. Why do you think the pedestrians use these reflective strips?

Answers

Answer:

I think they use it at night because they want to avoid involving themselves in road accident while crossing the street. When there are reflective strips on their clothes, drivers do notice them even at far ends of the street since the strips will reflect the rays from the car lights to the driver,hence, the driver notifies that there is a pedestrian crossing and therefore slows down.

What is the difference between centripetal force and centrifugal force???

Answers

Answer:

While centripetal force focuses towards the centre of a rotating path, the centrifugal force is just opposite to this, meaning it exerts a force to liberate a body from ...

Centripetal force is an inward force and centrifugal force is an outward force.

Centrifugal force is often referred to as inertial force or fictitious force.

More items...

Explanation:

Centripetal” is a word (apparently coined by Isaac Newton) meaning “center-pointing.”

“Centrifugal” means (roughly) “center-fleeing,” or pointing AWAY from the center (so, radially).

So the words simply refer to directions, and the “center” implies that the forces act in reference to motion in a circular path. Such motion is very common: in the case of a rotating rigid body (i.e., solid object), the motion can be described as a combination of (1) a movement through space of the center-of-mass plus (2) circular motion of all the particles in the body about an axis passing through the center of mass.

The net force on ANY mass moving in a circle at constant speed is a centripetal force. If the mass’s speed is changing along the circular path, there must be a tangential force in addition to the centripetal.

An example of a centrifugal force would be the force ON THE STRING when a stone tied to the string is whirled in a circle. The force on the stone is a centripetal force, and the third-law reaction force exerted on the string is a centrifugal force.

The flow of air from an ocean or lake to the land is called a ___________________________.

Answers

Maybe sea or onshore breeze

It develops due to the difference of air pressure greater by the different temperature of the water and land

Use the drop-down menus to complete each sentence.


The force applied to the physics cart is manipulated

Answers

Answer:b

Explanation:

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