help in solving this question please
(question is on the picture )
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Answer:

18 groups are in the modern periodic table

Answer:

There's 18 groups I'm pretty sure

Answer:

I would agree with the answers 1, 3, 4, 5

Obviously energy will not spontaneously flow from a cooler object to a warmer object

Answer:

A. Thermal energy that is not used to do work is often released to the surroundings.

C. Thermal energy flows from a warmer object to a cooler object.

D. Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.

E. Thermal energy flows when two objects in contact have a temperature difference.

Explanation:

Got it right on edge 23

The statement that is true about solar system densities is The denser planets lie closer to the Sun while the farther one planets from the sun have lower densities.

Solar system comprises of the the planets, moon, stars, comets , smaller bodies and how they orbit around the sun.

Therefore, The statement that is true about solar system densities is The denser planets lie closer to the Sun.

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Answer:

um d. but I am guessing this ans

Answer:

C

Explanation:

you need to be able to see through a colour filter, which means youd need transparent or translucent

Transparent materials passes light and they reflect also. The color filters are made by transparent or translucent materials. Thus option c is correct.

The ability of a material to pass light through it is called transparency. Some transparent materials can reflect the light. For example mirror, glasses etc. The materials which passes light but are not transparent is called translucent materials.

The material which does not pass light inside is called opaque. Wood, plastics etc. are opaque materials. Transparent covers, glasses make their inside visible.

Colour filters are made by transparent or translucent materials. They are used to filter or choose a particular colour from a group of reflected lights.

Color filters are used in spectrometers and other optical devices. They filter the incoming wavelengths to select the desired one. Hence, option c is correct.

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The path difference is 1.57 × 10⁻⁶ m

Distance is the amount of space between things. From distance, it is the hard to tell if someone's wearing the a vampire costume abd just a chic black outfit.

For constructive interference thai is formation of bright fringe through a diffraction grating is given by:

d sin θ = n λ

here, d is the distance between slits.

θ is the angle of diffraction

n is the order of fringe

and λ is the path difference.

λ = (d sin θ)/ n = (0.60 *10 ⁻³m) (sin 0.30°) ÷ 2 = 1.57 * 10⁻⁶ m

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Answer:

C is the answer

Explanation:

Answer:c

Explanation:work is force x distance. The wall doesn’t move any distance in A so that’s not work. B involves tasks that do work but I don’t think this is what they’re going for. For a short instance while kicking a ball, your foot is applying a force to the ball which moves a distance before following its own trajectory after contact with your foot. Because the contact has a short duration and isn’t instantaneous, this is work

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:

The efficiency of a simple machine is defined as the ratio of useful work done by a machine (output work) to the total work put into the machine (input work). For ideal or perfect machine, work output is equal to the work input.

Explanation:

Hope it Helps!!!

hi brainly user! ૮₍ ˃ ⤙ ˂ ₎ა

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[tex]\large \bold {ANSWER}[/tex]

3/7 of the fabric equals 18.

[tex]\large \bold {SOLUTION}[/tex]

To find the solution to your task, we will have to find 3/7 of 42, that is. How much is 3/7 of 42?

So, to find the value we must do the following way, multiply the value of the length of the fabric 42, by the numerator of the fraction 3 and divide by the denominator 7, See:

[tex]\begin{gathered}\Large\begin{array}{c}\tt\dfrac{3}{7}\:in\: 42\\\\ \tt 42\cdot 3=126\\\\ \tt 126\div 7=\boxed{\boxed{\tt 18}}\end{array}\end{gathered}[/tex]

Hence, 3/7 of the fabric equals 18.

Answer:

Periodic

Explanation:

The groups in the periodic table that want to gain electrons are groups; 15, 16 and 17. The members of these groups are mostly nonmetals.

a. The voltmeter reads 0.053 volts

b. The electromotive force, emf of the battery is 0. 106 volts

a. Given the current  = 1. 15A

Voltmeter reads the voltage = V

Resistance could be gotten from the diagram = R

V = IR

To find the resistance from the structure

First, find the resistance in parallel

Resistance in parallel = 1/R1 = 1/R2 + 1/R3 = 1/25 + 1/15 + 1/15 = 0. 17 Ohms

Now, find the resistance in series

Resistance in series = R1 + R2 + R3 = 45 + 0. 17 + 10 = 55. 17 Ohms

Finally, the  resistance in parallel = 1/35 + 1/55. 17 = 0. 028 + 0. 018 = 0. 046 Ohms

Substitute values into the equation

V = IR

V = 1. 15 * 0. 046

V = 0. 053 Volts

b. To find the Emf, use the formula

Emf =  V + Ir

Substitute the values into the formula

Emf = 0. 053 + 1.15 * 0.046

Emf  = 0. 053 + 0. 0529

Emf = 0. 106 volts

Therefore, the voltmeter reads 0.053 volts and the electromotive force of the battery us 0. 106 volts

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Alpha particles have highest mass.

Alpha particles are most ionising.

Gamma particles are the most penetrating.

Beta particles are negatively charged.

Gamma particles have the highest speed.

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If Kevin swims one 25.0-m stretch in 9.22 seconds, his average speed is approximately 2.71m/s.

Speed is expressed as distance over time.

Speed = Distance / time

Given the data in the question

Average speed = 25.0m / 9.22s

Average speed = 2.71m/s

If Kevin swims one 25.0-m stretch in 9.22 seconds, his average speed is approximately 2.71m/s.

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Answer:A or totalitarianism

Explanation: Totalitarianism is an authoritarian form of government in which the ruling party recognizes no limitations whatsoever on its power, including in its citizens' lives or rights

Some characteristics of totalitarianism:

Rule by a single party.

Total control of the military.

Total control over means of communication (such as newspapers, propaganda, etc…)

Police control with the use of terror as a control tactic.

Control of the economy.

Answer:

.409 N

Explanation:

For this to balance, the moments around the fulcrum must sum to zero.

On the left you have   .21   ( is that down? I will assume it is)

      Counterclockwise moments :

        .21 * 40     +  1.0 * 20    

     Clockwise moments :

        .5 * 20     +     F * 45

these moments must equal each other

.21*40 + 1 *20   =  .5 * 20 + F * 45

   F = .409 N

Answer:

Titan.It is the largest moon of Saturn

First harmonic of a closed pipe is determined as velocity, v, to four times length (4L), F₀ v/4L.

The first harmonic of a closed pipe is the fundamental frequency of the closed of the closed pipe.

L = λ/4

where;

λ = 4L

But, v = F₀λ

v = F₀(4L)

F₀ = v/4L

where;

Thus, first harmonic of a closed pipe is determined as velocity, v, to four times length (4L), F₀ v/4L.

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Answer:

shown below

Explanation:

1) P = F/A

P = 500 / 0.5

P = 1000N/m²

2) W = mg

W = 50 x 9.8

W = 490

P = F/A

P = 490 / 0.01

P = 49000N/m²

3) P = F/A

For E:

P = 40000 / 0.5

P = 80000N/m²

For W:

P = 600 / 0.0075

P = 80000N/m²

They're exerting the same amount of pressure on the ground

The velocity of the second glider after the collision is 4.33 m/s rightward.

Apply the principle of conservation of linear momentum;

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

where;

(2)(1) + (3)(5) = (2)(2) + 3v₂

17 = 4 + 3v₂

3v₂ = 17 - 4

3v₂ = 13

v₂ = 13/3

v₂ = 4.33 m/s

Thus, the velocity of the second glider after the collision is 4.33 m/s rightward.

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Answer:

Force can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size.

The energy stored in a capacitor is determined as  ¹/₂Q²/C.

The energy stored in a capacitor is determined from the following formulas as shown below;

U = ¹/₂Q²/C

Where;

Thus, the energy stored in a capacitor is determined as  ¹/₂Q²/C.

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Answer:

Gas Solid Liquid Plasma

Explanation:

Answer:

plasma

Explanation:

plasma has charged particles and ions and electrons floating around

Ultimate tensile strength is the maximum stress that a material can withstand just before fracture.

Stress is defined as the force acting per unit area. It is denoted by Sigma(σ)

When a body is undergoing stretch by applying a pull force, it stretches more and more until it reaches its elastic limit. A point comes when the body no more stretches and breaks or fractures at bottle neck formation. This strength of any material is known as Ultimate breaking Stress or Ultimate tensile strength.

Thus, Ultimate tensile strength is the maximum stress that a material can withstand just before fracture.

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The translational kinetic energy of the truck is 75000 Joules (J). The correct answer is 75000 Joules (J).

Given information:

Mass of the truck (m) = 1500 kg

Speed of the truck (v) = 10 m/s

The translational kinetic energy (KE) of an object is given by the formula:

KE = (1/2) × m × v²

where:

KE is the translational kinetic energy,

m is the mass of the object,

v is the speed of the object.

The translational kinetic energy of the truck:

KE = (1/2) × 1500 × (10)₂

KE = (1/2) × 1500 × 100

KE = 75000

KE = 75000 Joules (J)

So, the translational kinetic energy of the truck is 75000 Joules (J).

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a)The normal force on the luggage cart will be 305.85 N

b)The force would Tony needs to apply at a 30° angle to pull the luggage cart willl be 375 N.

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration. Mathematically aion in the different components and balancing the equation gets.Components in the x-direction.

Given data;

The angle of pulling with horizontal. =  30°

Mass of luggage cart=35 kg

Pulling force= 75 N

The force in the y-direction;

N+Fsin30° = mg

N+75 sin 30° = 35 × 9.81

N=305.85 N

The force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground;

N-mg=Fsin30

Fsin30=75 sin 30

Fsin30=375 N

Hence the normal force on the luggage cart and force would Tony need to apply at a 30° angle to pull the luggage cart willl be 305.85 N and 375 N.

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