Write down the advantage and disadvantage of using mercury as thermometric liquid..

Answers

Answer 1

Answer:

Advantage: Mercury has a lower freezing point (-1140 degree Celsius)

Disadvantage: Mercury has a lower boiling point


Related Questions

In which of the following situations would an electromagnet be more useful than a magnet? *
1 point
A teacher uses a magnet to attach their name tags to her shirt.
B child is linking magnetic balls together to make a necklace.
C parent is hanging up a good grade on a refrigerator.
D scrapyard worker is sorting car parts.

Answers

The answer to your question is: C                                    

4. An object has a mass in air of 0.0832 kg, apparent mass in water of 0.0673 kg, and apparent mass in another liquid of 0.0718 kg. What is the specific gravity of the other liquid

Answers

Question

4. An object has a mass in air of 0.0832 kg, apparent mass in water of 0.0673 kg, and apparent mass in another liquid of 0.0718 kg. What is the specific gravity of the other liquid

Hold on, our servers are swamped. Wait for your answer to fully load.

Answer:

Explanation:4. An object has a mass in air of 0.0832 kg, apparent mass in water of 0.0673 kg, and apparent mass in another liquid of 0.0718 kg. What is the specific gravity of the other liquid

help i dont understnad and its realky confusing

Answers

Answer:

See below

Explanation:

Wavelength is distance between  consecutive wave crests or consecutive  troughs

 in this situation when one boat is at crest the other is in the trough...

    the wavelength will be twice this distance between the boats

           WL = 2 * 18 = 36 meters

amplitude is (distance from bottom to top) divided by two

    ampl = 2.6/2 = 1.3 m    (this is the same as the distance from the midline of the wave to the top of the wave)

5 cycles in 10 seconds  ...the frequency is in Hz ...which is cycles per second ,  so the frequency = 5 cycles/ 10 seconds = .5 Hz

 Period is = 1/f = 1/.5 Hz = 2 seconds per cycle

Do turtles actually swim or are they ust going with the current?

A.Going with the current

B.Actually swimming

Answers

Answer:

Going with the current. You every watch Finding Nemo and the turtle guy says " Going with the waves bro"

Explanation:

Answer:

Young sea turtles make a concerted effort to swim in particular directions, instead of drifting with ocean currents.

A. Going with the current.

A rugby player sits on a scrum machine that weighs 200 Newtons. Given that the coefficient of static friction is 0.67, the coefficient of kinetic friction is 0.56 and the force required to push both the scrum machine and the player into motion is 850 Newtons, calculate the following: a)      The mass of the player ( 4marks) b)      The magnitude of the force required to keep both the scrum machine and the player in motion?​

Answers

a. 850 N is the minimum force needed to get the machine/player system moving, which means this is the maximum magnitude of static friction between the system and the surface they stand on.

By Newton's second law, at the moment right before the system starts to move,

• net horizontal force

∑ F[h] = F[push] - F[s. friction] = 0

• net vertical force

∑ F[v] = F[normal] - F[weight] = 0

and we have

F[s. friction] = µ[s] F[normal]

It follows that

F[weight] = F[normal] = (850 N) / (0.67) = 1268.66 N

where F[weight] is the combined weight of the player and machine. We're given the machine's weight is 200 N, so the player weighs 1068.66 N and hence has a mass of

(1068.66 N) / g ≈ 110 kg

b. To keep the system moving at a constant speed, the second-law equations from part (a) change only slightly to

∑ F[h] = F[push] - F[k. friction] = 0

∑ F[v] = F[normal] - F[weight] = 0

so that

F[k. friction] = µ[k] F[normal] = 0.56 (1268.66 N) = 710.45 N

and so the minimum force needed to keep the system moving is

F[push] = 710.45 N ≈ 710 N

A 20m long string has mass of 0.020kg .if 5.0m segment of the string is fixed at both ends and three loops are produced when a force of 10N is applied to the string .calculate the velocity and frequency of the standing wave of the string

Answers

Answer:

.

Explanation:

An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 0.46 eV. Use hc=1240 nm eV.

(a) What wavelength of electromagnetic radiation would be needed to excite the electron to the n = 2 state?
(b) What is the width of the square well?

Answers

For an electron is in the ground state of an infinite square well, the wavelength of electromagnetic radiation and the width of the square well  is mathematically given as

\lambda=67.96nma=0.7nmWhat wavelength of electromagnetic radiation would be needed to excite the electron to the n = 2 state?

Generally, the equation for the  wavelength is mathematically given as

[tex]\lambda=\frac{hc}{24e}[/tex]

Therefore

\lambda=1240/12.24ev

\lambda=67.96nm

In conclusion, the width of the square well

[tex]a^2=\frac{\pi^2*h^2}{2me}[/tex]

Therefore

[tex]a^2=\frac{9.85*1.10*10^-68}{18.2*10^31*1,21*10^{19}}[/tex]

a^2=0.492*10^18

a=0.7nm

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Answer:

λ=898.5nm

Explanation:

a)

ΔE=hc/λ

ΔE=[tex]E_{2} -E_{1}\\[/tex]

[tex]E_{2} =E_{1} *(n^{2} )[/tex]

Where n equals the new energy level (in this case 2)

so ΔE=(0.46)*4-0.46 = 1.38eV

λ=hc/ΔE

λ=1240nm eV/1.38eV

λ=898.5nm

If you place 1 C of positive charge on Earth and 1 C of negative charge on the moon, 384,500 km away, how much force would the positive charge on Earth experience?

Answers

Answer:

6.1 x 10^-8 newtons

Explanation:

F = 8.98 *109 *1*1/3845000002

Question 4 of 10
A person suffering from PTSD:
A. may have flashbacks and feel anxious.
B. may wash his hands hundreds of times a day.
C. cannot remember what happened to him.
O D. cannot be successful.

Answers

A the guy above me is right

To reduce auto emissions in the United States, modifications to automobile engines have been required since the 1960s.
a) true
b) false

Answers

Answer:

True

Explanation:

When a potential difference of 2 volt is applied across the ends of a wire of 5 metre length a current of 1 ampere flows through it,calculate :-
(i) the resistance per unit length of the wire
(ii) the resistance of 2 metre length of the wire
(iii) the resistance across the ends of the wire if it is doubled on itself

Answers

[tex]\huge\underline{\red{A}\green{n}\blue{s}\purple{w}\pink{e}\orange{r} ⟿}[/tex]

(i) 0.4 Ω m^-1

(ii) 0.8 Ω

(iii) 0.5 Ω

Explanation:

(i) Given, V = 2 volt, I = 1 A

Resistance of 5 m length of wire :-

[tex] = > R = \frac{V}{I} = \frac{2}{1} = 2 \: Ω [/tex]

Resistance per unit length of the wire :-

[tex] = > \frac{R}{l} = \frac{2}{5} = 0.4 \: Ω \: {m}^{ - 1} [/tex]

(ii) Resistance of 2m length of the wire~

[tex] = \: 0.4 \: Ω \: {m}^{ - 1} \times 2 \: m = 0.8 \: Ω [/tex]

(iii) When the wire is doubled on itself, its area of cross section becomes twice and the length becomes half. Let a be the initial cross section and ρ be the specific resistance of the material of wire. Then,

[tex]from \ relation \: \: ➪ \: R = ρ \times \frac{1}{a}. \\ \\ we \: have, \\ \\ initial \: resistance \:➪ \: 2 = ρ\times \frac{5}{a}....eqn(i) \\ \\ new \: resistance \: ➪ \: R` = ρ\times \frac{2.5}{2a}....eqn(ii) \\ \\ on \: dividing \: eqn(ii) \: by \: eqn(i)... \\ \\ \frac{R`}{2} = \frac{2.5ρ}{2a} \div \frac{5ρ}{a} = \frac{1}{4} \\ \\ R` = \frac{2}{4} = 0.5 \: Ω[/tex]

Thus, on doubling the wire on itself, its resistance becomes one-fourth.

Hope it helps you!!

What is an open circuit?
O A. A circuit that has a gap in the wire
OB. A circuit that uses very little wire
O C. A circuit that conducts an electric current
D. A circuit that has little or no resistance

Answers

Answer:

A

An open circuit is a circuit where the path has been interrupted or "opened" at some point so that current will not flow. An open circuit is also called an incomplete circuit.

Answer: A

Explanation:

An open circuit is a circuit that has no current flowing through it. The reason no current can flow through is due to a significant disconnect between two points in the circuit. For example, a large portion of the wire is cut out.

I haven't done any circuit analysis yet, but current can still flow through a circuit even if there is a cut. But that cut has to be extremely small.

the moon has an orbital period of 63.3 days. Calculate the average distance from the earth​

Answers

Answer:

2 pi R / T =     speed of moon

m V^2 / R = G M m / R^2        centripetal force = gravitational force

V^2 / R = G M / R^2

4 pi^2 R^2 / (T^2 R) = G M / R^2     using first equation

R^3 = 1 / (4 pi^2) * G M T^2        we need to know G and M

R^3 = .0253 * 6.67E-11 * 5.98E24 T^2 = 1.01E13 * T^2

63.3 da = 5.47E6 sec

T^2 = 2.99E13 sec^2

R^3 = 1.01E13 * 2.99E13 = 3.02E26 = 302E24 m^3

R = 6.70E8 m from center of earth

Using 1609 m/mile

R = 416,000 miles

Note: our moon is about 239,00 miles away

So this distance is about 1.74 our earth-moon distance

If T^2 proportional R^3    (the moon period is 27.3 da)

63.3/27.3 = 2.32         2.32^2 = 5.38

416/239 = 1.74              1.74^3 = 5.27

Not exact but reasonably close

Identify a scenario from
gym class that has an action-reaction force. Describe the situation

Answers

Answer:

A person is doing push-ups against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).

Explanation:

Why is cellular reproduction important for homeostasis?
It helps cells make oxygen.
It helps cells make glucose.
It removes waste from cells.
It splits a cell into new cell

Answers

It helps cells make glucose

I got it right in odyssey ware

Answer:

(It was a remove waste from cells)

Explanation:

the cell produces carbon dioxide and water, which are released as waste.

A car radio draws 0.28 A of current in the auto's 12-V electrical system. What is the effective resistance of the radio

Answers

The effective resistance of the car radio drawing in the given amount of current is 42.86Ω.

Ohm's law

Ohm's law states that "the voltage between two points is directly proportional to the current flowing through the resistance.

It is expressed as;

V = IR

Where V is voltage, I is current and R is resistance.

Given the data in the question;

Current drawn by the car radio I = 0.28AVoltage V = 12VEffective resistance of the radio R = ?

To determine the effective resistance of the car radio, we substitute our given values into the expression above.

V = IR

12V = 0.28A × R

R = 12V ÷ 0.28A

R = 42.86Ω

Therefore, the effective resistance of the car radio drawing in the given amount of current is 42.86Ω.

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2
Starting from rest, a child zooms down a frictionless slide from an initial height of 3.00 m. What is her speed at
the bottom of the slide? Assume she has a mass of 25.0 kg

Answers

Answer:

About 7.67 m/s.

Explanation:

Mechanical energy is always conserved. Hence:

[tex]\displaystyle \begin{aligned} E_i & = E_f \\ \\ U_i + K_i &= U_f + K_f\end{aligned}[/tex]

Where U is potential energy and K is kinetic energy.

Let the bottom of the slide be where potential energy equals zero. As a result, the final potential energy is zero. Additionally, because the child starts from rest, the initial kinetic energy is zero. Thus:

[tex]\displaystyle U_i = K_f[/tex]

Substitute and solve for final velocity:
[tex]\displaystyle \begin{aligned} mgh_i &= \frac{1}{2}mv_f^2 \\ \\ 2gh_i &= v^2_f \\ \\ v_f &= \sqrt{2gh_i} \\ \\ & =\sqrt{2(9.8\text{ m/s$^2$})(3.00\text{ m})} \\ \\ & \approx 7.67\text{ m/s} \end{aligned}[/tex]

In conclusion, the child's speed at the bottom of the slide is about 7.67 m/s.

2.3c. What is the frequency of a wave with a length of 12 m that travels at a speed of 36 m/s?

Answers

the frequency of the wave is 3
36/12= 3


A cyclist bikes with an average velocity of 20 m/s for 5 seconds.

What is the magnitude of the cyclist's displacement?
Your answer should have one significant figure.

Answers

Explanation:

v = s/t

20 = s/5

100 = s

s = 100 = 1 × 10².

When a cyclist bikes with an average velocity of 20 m/s for 5 seconds, the magnitude of the cyclist displacement would be 1×10² meters.

What is Velocity?

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object. The unit of velocity is meter/second. It can also be represented by the infinitesimal rate of change of displacement with respect to time. The generally considered unit for velocity is a meter per second.

The mathematical expression for velocity is given by the formula

velocity= total displacement/Total time

The area under the velocity-time graph represents the total displacement covered by the object while the slope of the velocity time graph represents the acceleration of the object.

For the given problem when a cyclist bikes with an average velocity of 20 m/s for 5 seconds,

Displacement =velocity×time

                       =20×5

                       =1×10²

The magnitude of the cyclist's displacement is 1×10²

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What is the door's moment of inertia for rotation about a vertical axis inside the door, 14 cm from one edge

Answers

The door's moment of inertia for rotation about a vertical axis inside the door, 14 cm from one edge is 4.205 kgm².

Momnet of inertia about a vertical axis inside the door

The door's moment of inertia for rotation about a vertical axis inside the door, 14 cm from one edge is calculated as follows;

[tex]I = I_{cm} + Md^2[/tex]

where;

I, cm is the moment of inertia about central axisd is the distance from the edgeM is mass of the door

[tex]d = \frac{L}{2} - 0.14\\\\d = \frac{0.91}{2} - 0.14\\\\d = 0.315 \ m[/tex]

Moment of inertia

[tex]I = \frac{1}{12} ML^2 + Md^2\\\\I = \frac{1}{12} (25)(0.91)^2 \ + \ (25)(0.315)^2\\\\I = 1.725 \ + \ 2.48\\\\I = 4.205 \ kgm^2[/tex]

Thus, the door's moment of inertia for rotation about a vertical axis inside the door, 14 cm from one edge is 4.205 kgm².

The complete question is below;

A 25kg solid door is 220 cm tall, 91 cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the degr,  14 cm from one edge.

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Obtain the potential on the x-axis at x = 0 for the following point charge distributions on the x-axis: 200 μC at x = 20 cm, -300 μC at x = 30 cm and -400 μC at x = 40 cm.

Answers

The eletric potential on the x - axis at x = 0 cm for the given three charges is determined as 9 x 10⁶ V.

Electric potential

The electric potential at a point is the work done in moving a test charge from infinity to a certain point.

Eletric potential at x = 0 cm

V(net) = V1 + V2 + V3

[tex]V = - \frac{kq}{r} \\\\V(net) = V_1 + V_2 + V_3\\\\V_{(net)} = -\frac{9\times 10^9 \times 200\times 10^{-6}}{0.2} + \frac{9\times 10^9 \times 300\times 10^{-6}}{0.3}+ \frac{9\times 10^9 \times 400\times 10^{-6}}{0.4}\\\\V_{(net)} = -9\times 10^6 \ + \ 9\times 10^6 \ + \ 9\times 10^6 \\\\V_{(net)} = 9\times 10^6 \ V[/tex]

Thus, the eletric potential on the x - axis at x = 0 cm for the given three charges is determined as 9 x 10⁶ V.

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Your bicycle has a
mass of 7 kg. You
accelerate at a rate of
2.45 m/s2. What is the
net force?

Answers

Answer:

17.15 N

Explanation:

Remember   F = m a

                       = 7 kg * 2.45 m/s^2 = 17.15 N

A swimming pool is an example of an open system. Ther pool loses 10.500 J of its thermal energy to the surrounding air at night, and the surrounding air adds 2,500 J of thermal energy to the morning. According to the law of conservation of energy, what is the change in energy

Answers

Answer:

2 and a half cows

Explanation:

There are 14 cows and the farmer consumes 10.

His child then slaughters and consumes one and a half cows.

The farmers wife then takes one to the market.

At todays prices, a singular cow is around £1,577, so to answer your question, the family made £1,577 from the one cow the wife sold.

What are the uses of magnet ?

Answers

Answer:

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials.

Answer:

Toys. Magnets are found in some toys. Compasses. In compasses, magnets are used to make sure that the needle always points north. Hospitals. In some medical processes, they use magnets. Fridge Magnets. Furniture and Household Appliances. hold Appliances. Jewellery. hold Appliances. Jewellery. Recycling.

Which of the following is not part of the control system? steering wheel exhaust pipe brake accelerator

Answers

Answer:

Brakes unevenly adjusted: Brakes pulling in one direction or the other can lead to a skid. Tires with worn tread: Tread is necessary for traction in wet weather

Explanation:

Answer: exhaust pipe

Explanation: It doesn't really control anything so I'm assuming this is the answer

PLSSSS HELPPPP ASAPPP

A fluorescent light bulb produces just as much light in the same electrical circuit as an incandescent bulb , but requires much less energy to produce it. Which of the following is the most logical explanation for this?

A. The incandescent bulb produces more forms of energy than just light, like heat.
B. The fluorescent light bulb produces more light than any other bulb.
C. The incandescent bulb has to be connected to another circuit.
D. The fluorescent light bulb generates more current than any other type.

Answers

Answer:

The most logical explanation is A.

Explanation:

because we are explaining why the incandescent bulb uses less energy we can eliminate answers B and D then, because we are talking about energy efficiency which has nothing to do with connecting to another circuit we can go with, A because Ultraviolet light generated by fluorescent light bulbs is nothing compared to the heat of an incandescent light bulb because it was engineered to be so.

What is the smallest particle in the Universe?

Answers

Answer:

Quarks

Quarks are among the smallest particles in the universe, and they carry only fractional electric charges. Scientists have a good idea of how quarks make up hadrons, but the properties of individual quarks have been difficult to tease out because they can't be observed outside of their respective hadrons.

Answer:

Quarks

Quarks are among the smallest particles in the universe, and they carry only fractional electric charges. Scientists have a good idea of how quarks make up hadrons, but the properties of individual quarks have been difficult to tease out because they can't be observed outside of their respective hadrons.

HELP PLS! Mrs. Frazier was on a jet ski traveling 25 km/min NE in Lake Norman last weekend. She started slower at 5 km/min but within 5 mins she had increased her speed. What was her acceleration?

21 km/hr


4 km/min2


100 km/min


6.2 km/hr

Answers

Answer:

4 km/min^2

Explanation:

acceleration is the rate of change of speed per time

25 -5 = 20 km/min speed change

20 km/min  / 5 min = 4 km /min^2

what is the principle of simple machine?​

Answers

Answer:

The principle of simple machine states that "if there is no friction in a simple machine, work output and work input are found equal in that machine.

Explanation:

Answer:

Usually, the term refers to the six classical simple machines which were defined by Renaissance scientists:

LeverWheel and axlePulleyInclined planeWedgescrew

Also, a simple machine uses a single applied force to do work against a single load force.

Explain, in terms of moments of forces, how the valve works.

Answers

The moment of forces in a valve equals force multiplied by the perpendicular distance to the pivot.

What is a Force?

This can be defined as an action which changes the motion of an object. A valve is fixed to a pivot and opens and closes thereby controlling flow of fluid.

The moment of forces in a valve is the force multiplied by the perpendicular distance to the pivot.

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Other Questions
How did global trade change in the twenty-first century? URGENT I'll give lots of points and mark brainliest is you wish.1. Think about the character you used during the "Living the Great Depression" activity. Is your character male or female? How old is your character? What is your character's position in life? What is your character's background? Does your character have other people who are dependent on him or her? Everything about a person and his or her background can influence the thoughts and opinions a person has. 2. Next, think of all the details about your character and how they might influence his or her opinions. Fill out a RAFTS chart to identify your character's point of view when telling about his or her experiences during the Great Depression. In doing this, you will need to decide who your character is going to communicate with in this assignment because you will be writing a letter reflecting on your situation and your opinions about it. 3. Acting as if you were your character, write a letter to the person you have identified as your audience (perhaps a teacher would be best). In your letter. make sure that you write using your character's point of view and voice Also make sure to include whatever feelings you may have had when you were in that person's role. Your letter should be at least one good paragraph in lengthplease make a paragraph Answer number 10 please thank you Pls help in 14 No idea What led to the tradition of bridesmaids wearing identical dresses?. How does this sentence help develop the author's ideas?A. It introduces Gandhi as the catalyst for the Salt March.B. It indicates that Indians did not understand the Salt Acts.C. It suggests that the Salt March was very long and arduous.D. It reveals that Gandhi was more important than he seemed. The revising stage may include which of the following?A.correcting spellingB.putting ideas on paperC.creating an initial outlineD.changing the organization 7. An engineer is investigating threeengines for fuel efficiency. The tablebelow shows the results of the tests forthe three engines. Which option gives thebest fuel efficiency? Why? IT'S A CONSTRUCTED RESPONSE!!! PLEASE SOMEONE ANSWER ME!!!! :/ Which stage of behavior change typically includes denial or lack of awareness?A) the preparation stageB) the maintenance stage C) the pre-contemplation stage D) the contemplation stage ONLY 130 AND HIGH IQ CAN SOLVE In 1990,a person is 15 years old In 1990,that same person is 10 years old How can this be?? How are computers used in producing weather forecasts? select two options. they compile data from multiple instruments. they collect air temperature and air pressure data. they eliminate the need for human meteorologists. they transmit data on developing weather systems from space. they use mathematical equations to show what will happen to the atmosphere if conditions change. 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It will immediately begin to dig back under the soil because of its sensitivity to light. What type of behavior is this?A. inheritedB. learnedC. mimickedD. imprintedQuestion 2 (1 point) Jody notices a trend in the information in the table. The trend that she sees suggests thatA. warm-blooded animals usually need to learn how to swim.B. animals born in water usually need to learn how to swim.C. warm-blooded animals usually know how to swim instinctively.D. animals born on land usually need to learn how to swim.Question 3 (1 point) A wolf attacks a porcupine and gets stung with quills. The wolf no longer attacks porcupines. 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