Every acid has__ atoms
Oxygen
Chlorine
Hydrogen
Sulfur

Answer:

constructive interference

Explanation:

waves come together so that they are in phase with each other

Answer:

The correct answer is option D.

Explanation:

From the given options the reaction which is not a double replacement reaction is:

[tex]Zn (s) + 2HCl (aq)\rightarrow H_2 (g) + ZnCl_2 (s)[/tex]

This because the above reaction is an example of single replacement reaction.

[tex]AB+C\rightarrow AC+B[/tex]

Whereas;

Double replacement reaction is a type of chemical reaction in which exchange of ions among the reactants take place.

[tex]AB+CD\rightarrow AD+CB[/tex]

Answer:

A and B

Explanation:

Answer:

Charge on each is 2 x 10⁻¹⁰.

Explanation:

We know that Force between two point charges is given b the Coulomb's law as:

F = kq₁q₂/r^2

k = 9 x 10^9

r = 3.00 cm

= 0.03 m

q₁ = q₂

F = 4.00 x 10^-7

Rearranging the formula, we get:

F = k q²/r²

q² = Fr²/k

q² = 4 x 10⁻⁷ x 0.03²/(9x10⁹)

q² = 4 x 10⁻²⁰

q = 2 x 10⁻¹⁰

As there is force of repulsion between the charges, the charges must be both positive or both negative.

Acceleration = (change in speed) / (time for the change)

Change in speed = 25 m/s

Time for the change = 30 sec

Acceleration = (25 m/s) / (30 sec)

Acceleration = (25/30) (m/s /s)

Acceleration = 0.833... m/s²

Answer:

Mental map

Explanation:

A mental map is a person's point-of-view perception of their area of interaction.

This is a short answer, but I Hope this helps!

- Kylie

Answer:

Mental map is the correct answer.

Explanation:

If you imagine how to walk from your house to the bus stop, you are using a:​ Mental map.

Answer:

China, US, India, and Russia

Answer:

-0.045 N, they will attract each other

Explanation:

The strength of the electrostatic force exerted on a charge is given by

[tex]F=qE[/tex]

where

q is the magnitude of the charge

E is the electric field magnitude

In this problem,

[tex]q=3.0\cdot 10^{-6}C[/tex]

[tex]E=-1.5\cdot 10^4 N/C[/tex] (negative because inward)

So the strength of the electrostatic force is

[tex]F=(-3.0\cdot 10^{-6}C)(1.5\cdot 10^4 N/C)=-0.045 N[/tex]

Moreover, the charge will be attracted towards the source of the electric field. In fact, the text says that the electric field points inward: this means that the source charge is negative, so the other charge (which is positive) is attracted towards it.

Answer:

The correct answer is actually -0.045; attract each other

Explanation:

To find the volume of 2400kg of gasoline with a density of 0.7g/cm³, convert the mass to grams and then divide by the density, yielding a volume of 3,428,571.43 cm³ or 3428.571 L.

The question asks for the volume of 2400kg of gasoline, given the density of petrol is 0.7g/cm³ (not g/km³ as mentioned in the question, which seems to be a typo). To calculate the volume, use the formula Volume = Mass / Density. First, convert the mass of gasoline from kilograms to grams (since the density is given in grams per cubic centimeter), which is 2400kg * 1000g/kg = 2,400,000g. Then, divide this by the density of petrol to find the volume. Hence, Volume = 2,400,000g / 0.7g/cm³ = 3,428,571.43 cm³ or 3428.571 L (since 1,000 cm³ is equivalent to 1 L).

Answer:

Covalent.

Explanation:

In carbon tetrachloride, chlorine and carbon are bounded with each other by single covalent bond. Carbon atom contains eight electrons in outer shell and chlorine atom also have eight electrons, so they are completing their octet by the sharing of electrons with each other.

Covalent bond is forming by the overlap of orbital, in CCl4 overlap is occurred so it is a covalent bounded compound. Formation of Ionic compounds occurs when two opposite charged ions interact with each other by electrostatic interaction such as NaCl, Na having positive and Cl having negative charge.

So, the answer is covalent bond.

Carbon tetrachloride (CCl₄) is a covalent compound. This means that the carbon and chlorine atoms are bonded together by sharing electrons.

Carbon tetrachloride is a nonpolar molecule, which means that the electrons are evenly distributed around the molecule. This is because the chlorine atoms are all equally electronegative, so they do not attract the electrons more strongly than the carbon atom.

Ionic compounds, on the other hand, are formed when there is a transfer of electrons from one atom to another. This occurs when one atom has a much higher electronegativity than the other atom.

The covalent bonding in carbon tetrachloride makes it a nonpolar molecule. This means that it does not have a permanent electric dipole moment, and it is not attracted to other polar molecules.

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Answer:

=1.667 A

Explanation:

For resistors connected in series, the same current flows trough all the resistors.

Therefore, V= IR (total)

V is the voltage of the supply, I the current through the circuit and R(total) the total resistance calculated calculated by adding the resistance of all the appliances in the circuit.

R (total) = 30+20+10= 60Ω as the value E can be replaced with Ω

V=IR

I=V/R

=100 V/ 60Ω

=1.667 A

Answer:

1.7A is the answer

Explanation:

Answer:

10. B. 30 kg.m/s

16. B. Elastic collision

20. Velocity

Explanation:

10. Momentum is simply the product of mass and velocity of an object. So it can be soved with the equation:

p = mv

Where:

p = momentum (kg.m/s)

m = mass (kg)

v = velocity (m/s)

Your problem gives you the following:

m = 15 kg

v = 2 m/s

p =?

So just fill in what you know:

p = mv

p = (15kg)(2m/s) = 30 kg.m/s

16. Elastic collision occurs when two objects collide and no loss in energy occurs after collision. Supposing that the balls are very bouncy, let's say they bumped into each other and they bounce-off of each other. If there is no loss in speed on both ends, that means that this is an elastic collision.

20. To differentiate vector and scalar quantity, just remember that vectors have direction. Both quanitites show magnitude, but vector quantities indicate the direction the magnitude is going. Among all the choices, it is only velocity that is considered as a VECTOR quantity.

Answer:

Medulla

Explanation:

Medulla is the part of your brain that controls basic life support function.

The  part of your brain that controls basic life support function is the medulla. The medulla sees to the transmission of information from the spinal cord to important parts of the brain.

The brain is the organ that controls every other organ in the body. It controls the nervous and the endocrine systems.

The  part of your brain that controls basic life support function is the medulla.

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Average speed = (distance rolled) / (time to roll the distance)

Average speed = (32 meters) / (0.8 sec)

Average speed = (32/0.8) (meters/sec)

Average speed = 40 m/s .

I don't know.  That's just a hair under 90 miles per hour.  Is this reasonable for a bowling ball ?  Does anybody roll a bowling ball as fast as a major league pitcher pitches a hardball ? ?

Answer:

Asher cycles 12 miles in 16 hours. What is his speed?

Speed is a rate of distance to time.

Asher’s speed is 12 miles per 16 hours.

As a unit rate, his speed is 0.75.

Explanation:

just took quiz

Answer:

An idea, event, or object can be represented by a 'model' to help people better understand it.

Explanation:

If an idea, event or object is to be represented or introduced to an individual or a group of people, a good idea is to represent it with a model.

The reason behind it being that a model will help the people understand it better as they will be able to see something in front of it and know what is being discussed.

A symbol is used to represent an idea, event, or object, to convey complex ideas and emotions with cultural significance. Symbolism allows for effective communication by providing a shorthand that encapsulates a variety of meanings within recognizable forms.

An idea, event, or object can be represented by a symbol to help people better understand it. Symbolism is the practice of using symbols such as gestures, signs, objects, signals, and words to convey complex ideas and emotions that are recognized shared meanings within a society. For example, the United States' flag might be just a piece of colored cloth, but it can represent a multitude of ideas from freedom and sacrifice to oppression, depending on one's perspective and cultural context.

Creating symbols can be a form of shorthand communication, offering a powerful way to express complex ideas without lengthy explanations. When writing, one might use imagery to evoke a sensory experience of an event or moment, thereby enriching the storytelling with deeper meaning. Symbols thus serve as cultural aggregates which crystallize a variety of emotions and concepts in a universally understandable way.

In some cases, models can serve as symbolic representations, such as equations, physical representations, or computer simulations which abstractly represent aspects of reality to convey understanding to others. Similarly, an analogy can be employed to make complex subjects more relatable by comparing them to familiar experiences or objects, ensuring effective communication with the audience.

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Answer:

The answer of tan(61) is:

A= 1.80

If a substance absorbs energy but its temperature does not change, then the internal potential energy is changing.

Answer:

If a substance absorbs energy but its temperature does not change, then the internal potential energy is changing.

Explanation:

I just did this question on the same lesson.

Final answer:

To calculate the total force required for lifting a box vertically, consider the weight of the box and the force applied by the person. Add these two forces together, making sure the directions are opposite.

Explanation:

In order to calculate the total force required for lifting a box vertically, you need to consider two main forces:

The total force required can be calculated by adding the weight of the box and the force applied by the person. It is important to note that the direction of the force applied by the person should be opposite to the direction of the weight of the box.

your answer would be 27.

The ratio of kinetic energy of ball A to ball B is 27

Answer: Option D

Explanation:

The kinetic energy of any object is the energy exhibited by the object when it is in motion. The kinetic energy of any object is directly proportional to the mass of the object and square of the speed at which the object is moving. So the kinetic energy of any object can be represented as

                 [tex]E_{k}=\frac{1}{2} \times m \times(\text { speed })^{2}[/tex]

In this case, for ball B the mass is 1 kg and speed is 1 m/s. So the kinetic energy of ball B is

            [tex]\text { Kinetic energy for ball } B=\frac{1}{2} \times 1 \times 1^{2}=0.5 J[/tex]

As it is said that the mass (M) and speed of ball A is three times the mass and speed of ball B.  So ,

         [tex]\text { M of ball } A=3 \times M \text { of ball } B=3 \times 1=3 \mathrm{kg}[/tex]

And,

           [tex]\text { Speed of ball } A=3 \times \text { Speed of ball } B=3 \times 1=3 \mathrm{m} / \mathrm{s}[/tex]

Thus, the kinetic energy of ball A will be

            [tex]\text {Kinetic energy for ball } A=\frac{1}{2} \times 3 \times 9=13.5 \mathrm{J}[/tex]

Now, to determine the ratio of kinetic energy of ball A to ball B,

[tex]\text { Ratio of kinetic energy }=\frac{\text {Kinetic energy of Ball } A}{\text {Kinetic energy of Ball } B}=\frac{13.5}{0.5} = 27[/tex]

Answer:

Liquids are more dense than gases, but less dense than solids, so sound travels 2nd fast in liquids. Gases are the slowest because they are the least dense.

Explanation: The more dense something is, the faster sound will travel through the matter. I hope this was the answer you was looking for.

Final answer:

Sound travels faster in mediums that are denser and more rigid, with solids being faster than liquids, which in turn are faster than gases. The closer particle arrangement in solids and liquids allows more efficient energy transfer. Temperature and air pressure also influence sound speed, with higher values generally leading to faster sound travel.

Explanation:

The speed of sound is influenced by the medium it travels through due to differences in density and rigidity. In solids, particles are packed together more closely compared to liquids, and in liquids, they are closer than in gases. This proximity allows for quicker transfer of sound energy from particle to particle. Sound waves travel faster in solids than in liquids because solids are more rigid and less compressible, and faster in liquids than in gases for similar reasons. In addition to rigidity and density, temperature also affects the speed of sound. Higher temperatures increase particle movement, thus enhancing sound transmission. The speed of sound is greater at sea level due to higher air pressure, which decreases the compressibility of air and allows sound to travel through it more quickly.

Answer:

Another term for planned economy is a socialist system.

The correct answer would be, Socialist system.

Socialist system is another term for a planned economy.

Explanation:

An economic system, in which the economy(including investment, capital and allocation of capital goods) is governed by a predefined economic and production plans, is called as the Planned Economy.

The system of planning in this economic system can either be centralized, decentralized or participatory.

This economic system is regulated by the Government. All decisions about the capital, lands, buildings, machinery, or other resources are taken by the government.

The production, prices, distribution, etc of the products or services are regulated centrally by the government.

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Answer:

d. causes the cell to make more viruses

Explanation:

Viruses depend on the host cells that they infect to reproduce. When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane. The capsid encloses either DNA or RNA which codes for the virus elements.

-- Electric field lines DO never cross.  (A)

-- Electric field lines that are close together DO indicate a stronger electric field. (B)

-- Electric field lines DO not affect the charge that created them.  (C)

-- Electric field lines DON'T begin on north poles and end on south poles.  North and South "poles" are the way we talk about magnets, not electric charges.

Explanation:

The imaginary lines that shows the direction of electric field are called electric field lines. The direction of electric field lines are from positive charge to the negative charge.

Two electric field lines can never ever intersect, if they do so there would be two direction of electric field at that point, which is not possible.

If the electric field lines are very to each other, then it indicates the stronger electric field. The electric field lines is unaffected by the nature of charged particle that created them.

Hence, the correct options are :

(A) They never cross

(B) Field lines that are close together indicate a stronger electric field

(C) They don't affect the charge that created them.

Answer:

Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics.

Explanation:

Don't know if this helped at all but I got it from this website:  

https://whatis.techtarget.com/definition/quantum-theory

Answer:

Matter in quantum mechanics is particles and waves.

(a) 30.9 m

Let's analyze the motion of the parachutist. Its vertical position above the ground is given by

[tex]y=h+ut+\frac{1}{2}gt^2[/tex]

where

h = 45 m is the initial height

u = 10 m/s is the initial velocity (upward)

t is the time

g = -9.8 m/s^2 is the acceleration of gravity (downward)

Substituting t=3 s , we find the height of the parachutist when it opens the parachute:

[tex]y=45 m+(10 m/s)(3 s)+\frac{1}{2}(-9.8 m/s^2)(3 s)^2=30.9 m[/tex]

(b) 44.1 m

Here we have to find first the height of the balloon 3 seconds after the parachutist has jumped off from it. The vertical position of the balloon is given by

y = h + ut

where

h = 45 m is the initial height

u = 10 m/s is the initial velocity (upward)

t is the time

Substituting t = 3 s, we find

y = 45 m + (10 m/s)(3 s) = 75 m

So the distance between the balloon and the parachutist after 3 s is

d = 75 m - 30.9 m = 44.1 m

(c) 8.2 m/s downward

The velocity of the parachutist at the moment he opens the parachute is:

v = u +gt

where

u = 10 m/s is the initial velocity (upward)

t is the time

g = -9.8 m/s^2 is the acceleration of gravity (downward)

Substituting t = 3 s,

v = 10 m/s + (-9.8 m/s^2)(3 s)= -19.4 m/s

where the negative sign means it is downward

After t=3 s, the parachutist open the parachute and it starts moving with a deceleration of

a =+5 m/s^2

where we put a positive sign since this time the acceleration is upward.

The total distance he still has to cover till the ground is

d = 30.9 m

So we can find the final velocity by using

[tex]v^2-u^2 = 2ad[/tex]

where this time we have u = 19.4 m/s as initial velocity. Taking the downward direction as positive, the deceleration must be considered as negative:

a = -5 m/s^2

Solving for v,

[tex]v=\sqrt{u^2 +2ad}=\sqrt{(19.4 m/s)^2+2(-5 m/s^2)(30.9 m)}=8.2 m/s[/tex]

(d) 5.24 s

We can find the duration of the second part of the motion of the parachutist (after he has opened the parachute) by using

[tex]a=\frac{v-u}{t}[/tex]

where

a = -5 m/s^2 is the deceleration

v = 8.2 m/s is the final velocity

u = 19.4 m/s is the initial velocity

t is the time

Solving for t, we find

[tex]t=\frac{v-u}{a}=\frac{8.2 m/s-19.4 m/s}{-5 m/s^2}=2.24 s[/tex]

And added to the 3 seconds between the instant of the jump and the moment he opens the parachute, the total time is

t = 3 s + 2.24 s = 5.24 s

Answer:

its D

Explanation:

because they share similar amounts of electrons in their outer shell. and characteristics is a learned trait which makes sense if we live with our family we would most likely act like them.

Answer: D

Explanation:

Just got it right on the quiz

η = 13.8 lm/W. The luminous efficacy of a incandescent lightbulb that produces 830 lumens and consumed a power of 60 W is 13.8 lm/W.

The luminous efficacy of a light source is the relationship between the luminous flux (in lumens) emitted by a light source and the power (in watts). The luminous efficacy of a light source or luminous efficiency measures the part of electrical energy that is used to illuminate and is obtained by dividing the luminous flux emitted by the electrical power consumed. Luminous efficiency is expressed in lumens per watt (lm / W). It is given by the relation:

η = F / P.  Where F is the luminous flux, and P is the power consumed by the light source.

The efficacy of a 60.0 W incandescent lightbulb that produces 830 lm is:

η = 830 lm / 60 W

η = 13.8 lm/W

Answer:

I. Electromagnetic waves

Explanation:

Answer:

I. Electromagnetic waves

Explanation:

Answer:

Newton gives us force

F=-G*M*m/R^2

Divide by the mass of the object to get acceleration

a=F/m = GM/R^2

You are solving the distance where the force from the moon equals the force from the Earth -

a= G*(mass of earth)/R^2 - G*(mass of moon)/(384400000-R)^2=0

Or in other words

G*(mass of earth)/R^2=G*(mass of moon)/(384400000-R)^2

Divide by G*(mass of the moon) and multiply by R^2 to get terms on both sides

G*(mass of earth)/(G*(mass of moon))=R^2/(384400000-R)^2

Since the mass of the moon and earth are fixed, the left side is a number

81.3 = R^2/(384400000-R)^2 → R^2/(384400000-R)^2–81.3 = 0

simplify

R/(384400000-R) = 9.01665

R=346024000 = 346,024 km.

Explanation: