The mercury thermometer operates on the principle of

Explanation:

you should first find the proportionality constant or the spring constant(as we see it as a spring).the find the value of x so that the force is 3N

The limestone is hard and compact and can be grinded into fine grained calcareous rocks and this contributes to its usefulness.

Limestone is a type of sedimentary rock that is mainly made up of mineral calcite (calcium carbonate, CaCO3).

Their physical properties include the following;

Therefore, the limestone is hard and compact and can be grinded into fine grained calcareous rocks and this contributes to its usefulness.

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Answer:

8.35 ×[tex]10^{-3}[/tex] kg

Explanation:

Remember the formula for heat:

[tex]Q=mc\Delta T[/tex]

You just need to solve for m, doing so you're left with:

[tex]m=\dfrac{Q}{c\Delta T}[/tex]

Replace the variables with numbers and that's it.

The mass of a sample of water is 0.841 kg.

Specific heat is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or Kelvin). It is a characteristic property of a substance that reflects its ability to store and release thermal energy.

Different substances have different specific heat capacities, depending on their chemical composition and physical properties. For example, water has a high specific heat capacity of 4,200 joules per kilogram per degree Celsius (J/kg°C), which means that it takes a large amount of heat energy to raise the temperature of water by one degree Celsius. In contrast, metals such as copper and aluminum have much lower specific heat capacities, which means that they heat up and cool down more quickly than water when subjected to the same amount of heat energy.

The specific heat of a substance can be measured experimentally using calorimetry, which involves measuring the amount of heat energy absorbed or released by a substance as it undergoes a change in temperature. The specific heat of a substance is an important parameter in many fields of science and engineering, including thermodynamics, materials science, and environmental science.

Here in the Question,

We know the  formula:

Q = mcΔT

where:

Q = amount of heat lost by the sample of water, which is -870 J (negative because heat is lost)

m = mass of the sample of water, which is what we need to find

c = specific heat capacity of water, which is 4200 J/kg °C

ΔT = change in temperature, which is -24.8 °C (negative because temperature dropped)

Substituting the values, we get:

-870 J = m(4200 J/kg °C)(-24.8 °C)

Simplifying, we get:

m = -870 J / (4200 J/kg °C × -24.8 °C)

m = 0.841 kg

Therefore, the mass of the sample of water is 0.841 kg.

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The electric potential energy in a capacitor will be 5 × 10 ⁻⁹ J.

A capacitor is a device that can store electrical energy. It is a two-conductor configuration separated by an insulating medium that carries charges of equal size and opposite sign.

An electric insulator or vacuum, such as glass, paper, air, or a semiconductor termed a dielectric, can be used as the non-conductive zone.

The  electric potential energy in a capacitor is found as;

[tex]\rm E = \frac{1}{2} QV[/tex]

[tex]\rm E = \frac{1}{2}\times 1.0 \times 10^{-10} \ C \times 100 \ V \\\\ E= 5 \times 10^{-9} \ J[/tex]

Hence the electric potential energy in a capacitor will be 5 × 10 ⁻⁹ J.

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Answer:

200 j is kinetic energy of mass

Answer:

B

Explanation:

Remember:

F = m * a

 =  10 * 2  = 20 N

Answer:

2.8125 meters

Explanation:

I will assume 7.5 m/s

When the Kinetic Energy is entirely converted to Potential energy the max height will have been reached

KE = PE

1/2 m v^2 = mgh     divide by m

1/2 v^2 = gh         looking for  h     so divide both sides by

1/2 v^2 / g   = h      sub in the values   using g = 10 m/s^2

1/2 ( 7.5 )^2 / 10  = 2.8125 m

The component form of the vector - u + w is determined as  -2i + 3j.

The component vector V is calculated from the summation of vector U and vector W.

v = -u + w

Given;

v = -(2i - j) + i + 2j

v = -2i + j + 2j

v = -2i + 3j

                                     y - axis        

                                        ↑  

                                        ↑  

                                        ↑ 3j

                                        ↑

x - axis  ←    ←    ←    ←    ←

                      2i

The complete question is below:

if u = 2i - j  and w = i + 2j, find the component form of ~v = -u + w~ and sketch the specified vector operations geometrically.

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Explanation:

hope it will help you understand, if you have any questions just let me know.

Answer:

5 sec

Explanation:

The formula for speed is distance/time taken. so if we use cross multiplication we get distance = speed x time taken. And to get rid of speed we divide both equations by speed like this distance = speed x time taken

speed speed

We cancel out speed by speed and we get this formula to calculate time.

time taken = distance

speed

Now we got the formula we need so we substitute them by their values.

time taken = 200m

40m/s

We cancel meter by meter and divide 200 by 40 and the answer will be 5 seconds. please give me like, thank me and make my answer the brainliest.

The conditions established by forward- and reverse-bias conditions on a P-N junction diode are: For forwarding bias, the current flows easily without opposition, this causes more current to pass, For reversed bias, the current flow is restricted and this causes less amount of current to pass.

A forward bias is a state attained by a diode as a result of its positive terminal that is connected to the positive part of a circuit and its negative terminal connected to the negative part of the circuit.

A reversed bias is a state attained by a diode as a result of its positive terminal that is connected to the negative part of a circuit and its negative terminal connected to the positive part of the circuit.

In conclusion, The conditions established by forward- and reverse-bias conditions on a P-N junction diode are: For forwarding bias, the current flows easily without opposition, which causes more current to pass, For reversed bias, the current flow is restricted and this causes less amount of current to pass.

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The conditions established by forward- and rear- bias conditions on a P- N junction diode are For encouraging bias, the current flows fluently without opposition, this causes further current to pass, For reversed bias, the current inflow is confined and this causes lower quantum of current to pass.

Meaning of a Forward and reversed bias-

A reversed bias is a state attained by a diode as a result of its positive outstation that's connected to the negative part of a circuit and its negative terminal connected to the positive part of the circuit.

In conclusion, The conditions established by forward- and rear- bias conditions on a P- N junction diode are For encouraging bias, the current flows fluently without opposition, which causes further current to pass, For reversed bias, the current inflow is confined and this causes lower quantum of current to pass.

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Answer:

To check whether a chemical equation is balanced or not we usually look if elements on the product side are numerically equal to the reactant side or not.

A. Na + MgCl₂ → NaCl + Mg

Reactant Product

Na = 1 1

Mg = 1 1

Cl = 2 1

Unbalanced

B. 2LiOH + H₂S → Li₂S + 2H₂O

Reactant Product

Li = 2 2

S = 1 1

O = 2 2

H = 4 4

Balanced

C. AgNO₃ + NaCl → NaNO₃ + AgCl

Reactant Product

Ag = 1 1

N = 1 1

Na = 1 1

Cl = 1 1

O = 3 3

Balanced

D. 3PBr₃ + 2Cl₂ → 3PCl₃ + 2Br₂

Reactant Product

P = 3 3

Br = 9 4

Cl = 4 9

Unbalanced

Therefore, equations B and C are balanced chemical equations.

The final temperature of the given mass of water at the initial temperature is 45.8 ⁰C.

The change in temperature of the water is calculated as follows;

Q  = mcΔθ

Δθ = Q/mc

where;

Δθ = (10,000)/(0.1 x 4200)

Δθ = 23.8

T2 - T1 = 23.8

T2 = 23.8 + 22

T2 = 45.8 ⁰C

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Except for Pluto, all of the planets in the solar system have slightly elliptical orbits.    

Pluto, a dwarf planet, the orbit is highly elliptical, with an eccentricity of 0.25, and it travels between 4.4 and 7.4 109 kilometers (2.7-4.6 109 miles) from the Sun on average. As a result, Pluto's orbit occasionally brings it closer to the Sun than Neptune, which implies that sometimes Pluto is much closer to the Sun than other times.

Pluto orbits the Sun at an angle of 17 degrees. This indicates that Pluto occasionally orbits above the other planets and occasionally orbits below them.

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To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader. The statement is True.

What a person thinks upon a situation and get through it makes the character of a person and defines his behavior.

Given is a statement "To identify a satirical tone, look for words an author uses to exaggerate a particular character behavior to make that person appear ridiculous to the reader".

The words used by the person forms the character. So, the author searches for the word which says about his character but the reader finds it ridiculous.

Thus, the statement is true.

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Answer:

Plane Motion

Plane Motion One of the most common examples of motion in a plane is Projectile motion.

alpha < beta < gamma.

Gamma rays are parts of electromagnetic spectrum.

1. Gamma rays  travel with the speed of light with maximum velocity.

2. Gamma rays do not have mass have maximum penetrating power.

Beta rays are negatively charged and have negligible mass.

1. Neutron is divided into proton and electron on emission of beta particles.

2 .Beta particles have less mass and very high velocity, so their penetrating power is more than alpha particles.

Alpha rays  are positively charged it contain high energy Helium nucleus with 2 proton and 2 neutron.

1. Mass of Alpha rays are 4u

2. Alpha rays are heavier and maximum charged than beta and gamma particles.

3.Alpha particles have least penetration power it can't travel more than 10-18 cm.

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Answer:

calcite

Explanation:

Answer:

34g

(second option listed)

Explanation:

half life is the number of days it takes to decrease by half,

after 8 days you are left with half of the original portion

in a period of 32 days, we experience 4 repeats of 8 days

(it gets cut in half four times):

544 / 2 = 272  {day 8}

272 / 2 = 136  {day 16}

136 / 2 = 68 {day 24}

68 / 2 = 34 {day 32}

so, after 32 days, 34g of ooblek are left un-decayed

hope this helps!! have a lovely day :)

When a substance changes from a liquid to a solid, they move more slowly and become fixed in position. Option A is correct.

When a substance changes from a liquid to a solid, its particles lose energy and move more slowly. As the temperature decreases, the particles lose kinetic energy and start to arrange themselves into a fixed, ordered pattern. This causes the substance to solidify and the particles become fixed in position.

The transition from a liquid to a solid state is called freezing or solidification. During this process, the particles lose energy and their motion becomes more restricted, causing them to move more slowly and eventually become fixed in position. Option A is correct.

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UTC is generally adopted as the local time at Prime Meridian (PM).

UTC is an abbreviation for Coordinated Universal Time and it can be defined as a local time standard by which all clocks, time and time zones are regulated around the world.

This ultimately implies that, Coordinated Universal Time (UTC) is generally adopted as the local time at Prime Meridian (PM) because it nominally reflects mean solar time.

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The variable that is altered by the independent variable is called the dependent variable. the spectrum given out by the hypothetical unknown celestial object.

Name : Christopher Andre

Instructor name : Albert brown

Name of the lab : ELS Laboratory

The term electromagnetic spectrum refers to the range of electromagnetic radiation's frequencies, as well as the wavelengths and photon energies connected to each frequency.

By analyzing the absorption spectra of the planets and moons, the electromagnetic spectrum experiment seeks to identify the components that make up their atmospheres.

From below one hertz to over 1025 hertz, electromagnetic waves are included in the electromagnetic spectrum.

The wavelengths that correlate to the frequency range from tens of thousands of kilometers to a small portion of the size of an atomic nucleus.

Starting at the low frequency (long wavelength) end of the spectrum, each frequency band's electromagnetic waves are referred to by a variety of names.

Hence the dependent variable is the one that changes as a result of the independent variable.

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Answer:

People with presbyopia require a convex lens for reading glasses; specialized preparations of convex lenses usually require the services of an optometrist

density = mass / volume

mass = 81.34 - 62

= 19.34 g

volume = 24.6 ml

density = 0.786 g/ml

The way you will know that a figure represents a vector is that it will have magnitude and direction.

A figure that is a vector will typically have magnitude and direction. This means that it will be represented by an arrow(s)  with its' magnitude also showing.

Whereas, on the opposite side, the figure is termed as a scalar if it doesn’t have a direction.

Thus, we can know a vector diagram if the magnitude and direction are indicated.

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Answer:

6/5  * R

Explanation:

The 3 in series sum to 3R for one branch of the parallel circuit

 the 2 in series sum to 2R  for the other side of the parallel circuit

now find the equivalent R of the parallel circuit with 3R and 2R

 here is one way

   Requiv = 1 / ( 1/(3R) + 1/(2R) ) =

                  1/ ( 5/(6R) ) =

                    6R/5  

the equiv resistance = 6/5  * R

The mass of the metre stick given the data from the question is 150 g

Clock wise moment = Anticlockwise moment

M × 25 = 150 × 25

M × 25 = 3750

Divide both sides by 25

M = 3750 / 25

M = 150 g

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Answer:

4 m/s²

Explanation:

v = v₀ + at

80 = 0 + 20a

80 = 20a

a = 4 m/s²

a. The free-body diagram for the glass when it is at the top of the circle is attached below.

b. The equation for the net force on the glass at the top of the circle in terms of w, Fn, m, v, and r is mg x g + N - mg x Vtop² /R =0

c. The glass will fall out of the bucket if the normal force between the glass and bucket equals zero. The speed with which she spin the bucket to prevent this from happening is 3.83 m/s.

d. The string will break if the tension on it is more than 100 N. The range of speeds can prevent the string from breaking is 3.83< Vtop<4.99 m/s

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

Given, Angela has a bucket of mass 2 kg tied to a string. She places a drinking glass of mass 0.5 kg in the bucket. She spins the bucket in a vertical circle of radius 1.5 m. She must swing the bucket to keep the glass from falling out.

a. The free body diagram of the bucket and glass is attached below.

b. Bucket will undergo centrifugal force

Fb = mVtop² /R

From the equilibrium of forces, we have

For bucket,

T +mb xg - N = mb x Vtop² /R..............(1)

For glass,

mg x g + N = mg x Vtop² /R..............(2)

Thus, this is the net force equation on the glass.

c. On adding both the equations. we have

T + (mb + mg) xg = (mb + mg) Vtop² /R

Substituting the values, T = 0 and from the question, we get

0 + (2+0.5) 9.81 = (2+0.5)(Vtop²/0.5)

Vtop = 3.83 m/s

Thus, the speed of spin to prevent glass from falling out is 3.83 m/s

d. The string will break if the tension on it is more than 100 N

100 + (2+0.5) 9.81 = (2+0.5)(Vtop²/0.5)

Vtop = 4.99 m/s

Thus, the range of velocity is 3.83< Vtop<4.99 m/s

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