HELP me with this please !!!

B is a speed.

A is an acceleration.

C and D are velocities.

The example of speed, with the unit as m/s (meter per second) in the following options is, option B. The option B has speed of 2 meter per second.

Speed of an body is the distance traveled by it with respect to time. Speed of a object is the ratio of total distance traveled by the object to the time taken by it. It can be given as,

[tex]s=\dfrac{x}{t}[/tex]

Here, (x) is the distance traveled by a body and (t) is the time taken by it.

As the distance is measured in the meters and time is measured in the second. Thus the speed of an object is measured in meter per second (m/s).

When the distance travelled by an object with respect to time is represented with its direction, then it is called the velocity of the object in that direction.

The rate of change of velocity is called the acceleration. It is represented in the meter per squared second (m/s²).

In the given option,

The example of speed, with the unit as m/s (meter per second) in the following options is, option B. The option B has speed of 2 meter per second.

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For the surface,i would say Most Likely Ignious rock,since the process happens from cooling and volcanoes are mostly found on the surface of the earth, Hope this helped (:

Sedimentary for apex.

Answer: The correct answer is ''nail".

Explanation:

Electromagnet is a temporary magnet. The electromagnet is made by wrapping the coils around the soft iron. Then, pass the current through it. In this way, It will act as a temporary magnet.

As long as the current passes through it it will retain its magnetic property. When the current is not flowing through it then it will lose its magnetism.

Iron is a ferromagnetic material. It will retain the magnetic property as long as the current flows in the electromagnet.

Therefore, an electromagnet can be made by wrapping wire around the nail.

Potential difference is measured using a device called a voltmeter . Just like ammeters, some types have a pointer on a dial, but most have a digital display. However, unlike an ammeter, you must connect the voltmeter in parallel to measure the potential difference across a component in a circuit.

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It is just simply called a Voltmeter, and it reads potential differences.

Answer:

A force that objects exert, stopping solid objects from passing through each other aka contact.

Pls mark Brainiest, am trying to become Virtuoso

Charge +1

That is;  (1 × -2) + (2 × x) = 0 , where x is the charge of Cs

= -2 + 2x = 0

= 2x = +2

  x = +1

The charge of cesium in the compound with a formula of Cs₂O is +1

To obtain the charge of cesium, Cs in the compound with a formula of Cs₂O, we shall determine the oxidation number of cesium, Cs in the compound. This is illustrated below:

Cs₂O = 0 (Ground state)

2Cs + O = 0

2Cs - 2 = 0

Collect like terms

2Cs = 2

Divide both sides by 2

Cs = 2/ 2

Cs = +1

Thus, we can conclude from the above calculation that the charge of cesium, Cs is +1

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Non-market distribution method

non-market distribution methods, hope this helps. Have a good day.

182 Horsepower =

135,717.38 Watts

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Answer:

135,722

Explanation:

ck12

➷ This is a true statement. The Mediterranean diet often replaces things such as butter with olive oil.

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➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

True. Olives and olive oil are staples foods in the Mediterranean diet. I Mediterranean and i can guarantee you it 100%.

begin with vibrations of the eardrum. Sound waves cause the eardrum to vibrate. Cells in the cochlea detect the vibrations and send a message to the brain.

Answer:

Sound must have a means by which it can be transported, for example air. That is why there is no sound in space.

The way our brain perceives sound is through the ears. The tympanum that the human being has is connected to three bones and when the air vibrates, the tympanum also vibrates, causing these vibrations to pass through those bones towards the inner part of the ears and from there to our brain.

That is the way the brain perceives sound.

I don’t really really know

Weight is a  unit of force.

Newtons measure force.

5 kg is a mass and is in kg. Kg and mass are independent of location. 5 kg is 5 kg on the moon, here on earth, on Jupiter and on Mars or anywhere else you care to name.

F = m*a

F = 5 * 9.81

F = 49.05 Newtons. This is how things should be weighed on planet earth.

Here is your answer

D. III only

REASON:

1) The degree of curveness at the poles is maximum.

2) The density of field lines at and near poles is maximum.

Thus, magnetic field strength is maximum at the magnetic poles.

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To increase the pitch of the jug sound, remove more liquid; doing so decreases the air column inside the jug which makes the vibration faster, thereby increasing the pitch.

The pitch of the sound produced by a jug when blown across the top is determined by the column of air that can vibrate inside the jug. The longer the air column, the lower the pitch of the sound, analogous to how longer pipes in a pipe organ produce lower notes. Therefore, to play a higher-pitched sound with a jug, the musician should remove more liquid from the jug. By doing so, he decreases the air column which makes the vibration faster, thus producing a higher-pitched sound. It is important to note that forcing more air over the opening of the jug does not change the pitch of the sound but increases the volume while adding more liquid produces a lower-pitched sound.

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We don't know anything about the direction of the track, so we can't say anything about the train's 'velocity'.  The best we can do is talk about its speed.

Speed = (initial speed) + (acceleration) x (time spent accelerating)

Speed = (20 m/s) + (2 m/s²) · (30 sec)

Speed = (20 m/s) + (60 m/s)

Speed = 80 m/s

(This is about 179 miles per hour, so if this is not a bullet train of some kind, then get ready for an ugly crash.)

Answer:

The electrons must be attracted to each other.

Explanation:

The complete question is:

"What is necessary for a metallic bond to form?

The atoms should be in close proximity.

The atoms should be far apart.

The electrons must be attracted to each other.

The nuclei must contain neutrons."

The metallic bond is a force that is responsible for holding the atoms together in a metallic substance. In other words, the metallic bond occurs between two metal atoms. Metal atoms need to give up electrons to achieve the configuration of a noble gas. In this way, this type of bonding all the enveloped atoms lose electrons from their outermost layers, which move more or less freely between them, forming an electronic cloud (also known as the sea of ​​electrons).

In other words, a metal is a set of metal cations immersed in a sea of ​​delocalized electrons where the electrostatic attraction between positive (of the cation) and negative (of the electron) charges holds together all the atoms of the metal that forms the bond .

The metallic bond is the only bond where the electrons are not located exclusively between a pair of atoms, but are relocated among millions of them in a kind of glue or "sea of ​​electrons" that keep them tightly bound or cohesive.

The answer is: The electrons must be attracted to each other.

To form a metallic bond, certain conditions must be met, including the presence of metal atoms, valence electrons, delocalized electrons, and a metal lattice structure.

In order for metallic bonds to form, certain conditions must be met:

When these conditions are met, the valence electrons are shared among all the metal atoms, resulting in the formation of a metallic bond. This bond gives metals their unique properties, such as high electrical conductivity and malleability.

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Since there's no choices, I will show an example.

Answer:

Refer to the diagram attached

Explanation:

What is magnetic field

Magnetic field describes the magnetic influence on moving electric charges, electric currents, and magnetic materials , which is a vector field. A moving charge experiences a force that is perpendicular to both its velocity and the magnetic field in a magnetic field.

What are magnetic field lines?

Magnetic field lines from a bar magnet are closed loops. By convention, the field direction of a magnet is assumed to be outward from the North pole and inward from the South pole. Permanent magnets can be created using ferromagnetic materials.

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A.

Waves can transfer energy but they can’t transfer matter

Tue statement that is false about waves is that waves can transfer energy to matter. That is option D.

A wave is defined as a disturbance in a medium that carries energy without a net movement of particles.

The main properties of a wave include the following:

The above properties possessed by waves makes it possible for it to be able to transfer an object, change its direction and interact with each other but not to transfer energy to matter.

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Answer:

[tex]4.95\cdot 10^{-21} J[/tex]

Explanation:

First of all, let's convert everything into SI units:

n = 2.4 mol (number of gas moles)

[tex]p=11 atm = 1.11\cdot 10^6 Pa[/tex] (gas pressure)

[tex]V=4.3 L=4.3\cdot 10^{-3} m^3[/tex] (gas volume)

R = 8.31451 J/K · mol (gas constant)

The ideal gas equation states that

[tex]pV=nRT[/tex]

Solving for T, we find the gas temperature

[tex]T=\frac{pV}{nR}=\frac{(1.11\cdot 10^6)(4.3\cdot 10^{-3})}{(2.4)(8.31451)}=239.2 K[/tex]

And now we can find the average kinetic energy of the gas:

[tex]E_K = \frac{3}{2}kT[/tex]

where

k = 1.38066 × 10−23 J/K is the Boltzmann's constant

Substituting,

[tex]E_K = \frac{3}{2}(1.38066\cdot 10^{-23} J/K)(239.2 K)=4.95\cdot 10^{-21} J[/tex]

The average kinetic energy of the gas molecule is 4.97 × 10⁻²¹ J

From the question, we are to calculate the average kinetic energy of the gas molecule.

The average kinetic energy of a gas molecule can be calculated from the formula,

[tex]KE_{avg}=\frac{3}{2}k_{b}T[/tex]

Where [tex]k_{b}[/tex] is the Boltzmann's constant

and T is the temperature

Now, we will determine the temperature of the gas

From the given information

R = 8.31451 J/K.mol

n = 2.4 moles

V = 4.3 L

P = 11 atm = 1114.58 KPa

From the ideal gas equation

PV=nRT

Then, we can write that

[tex]T = \frac{PV}{nR}[/tex]

Putting the parameters into the equation, we get

[tex]T = \frac{1114.58 \times 4.3}{2.4 \times 8.31451}[/tex]

T = 240.1772

T ≅ 240.2 K

Now, for the average kinetic energy of the gas molecule

[tex]KE_{avg}=\frac{3}{2}k_{b}T[/tex]

From the given information

[tex]k_{b} = 1.38066 \times 10^{-23}[/tex]

∴ [tex]KE_{avg}=\frac{3}{2} \times 1.38066 \times 10^{-23} \times 240.2[/tex]

[tex]KE_{avg}= 4.97 \times 10^{-21} \ J[/tex]

Hence, the average kinetic energy of the gas molecule is 4.97 × 10⁻²¹ J

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16,000/4,000=4*100= 400

Answer: 400

Answer:

The efficiency of the engine is 25%.

Explanation:

Given that,

Output energy = 4000 J

Input energy = 16000 J

The efficiency of the engine is equal to the output energy divided input energy.

Formula of the efficiency is defined as,

[tex]\eta =\dfrac{Output\ energy}{Input\ energy}\times100[/tex]

[tex]\eta=\dfrac{4000}{16000}\times100[/tex]

[tex]\eta=0.025\times100[/tex]

[tex]\eta=25\%[/tex]

Hence, The efficiency of the engine is 25%.

Its B. I had the question just a week ago

Dave is right because most forms of EMR can be dangerous but the most dangerous form of Electromagnetic radiation has the most energy. This radiation is called gamma rays. Gamma rays are emitted by the nucleus of an atom and can go through 6 feet of concrete, as well as damage your DNA!

Have a nice day!

The answer is:

[tex]46.19\frac{m}{s}[/tex]

Since we know the angle and the horizontal component (x-axis component) of the initial velocity, we can calculate the actual velocity (initial velocity) using the following equation:

[tex]Vo_{x}=Vo*Cos\alpha[/tex]

Where:

[tex]Vo_{x}=40\frac{m}{s}\\Vo= Initial velocity\\\alpha = angle= 30 (degrees)[/tex]

So, from the equation we can calculate Vo,

[tex]Vo_{x}=Vo*Cos\alpha\\\\\frac{Vo_{x}}{Cos\alpha}=Vo[/tex]

Then, by substituting we have:

[tex]Vo=\frac{40\frac{m}{s} }{Cos30}=\frac{40\frac{m}{s}}{0.866}=46.19\frac{m}{s}[/tex]

Have a nice day!

Answer:

RESISTANCE

Explanation:

Answer:

Resistance

Explanation:

In a circuit, voltage source (cell or battery), key (for closing and opening circuit), resistance and a conducting wire are main components. Ohm's law states that current flowing in the circuit is proportional to the potential difference across the two ends.

V = I R

Where R is the resistance. Current also depends on the resistance. Greater resistance means lesser current would flow.

A light bulb and toaster represent resistance. These devices are based on Joule's Heating. When current passes through a resistance, it heats up and energy is lost as heat in case of toaster and as heat and light in case of light bulbs.

A. Sacral is the answer.

Sacral is the vertebrae are normally fused together to form a solid mass of bone.

Vertebrae exist the 33 individual, interlocking bones that form the spinal column. Each vertebra has three primary functional components: the vertebral body for load-bearing, the vertebral arch to rescue the spinal cord, and transverse processes for ligament attachment.

Sacral is the vertebrae are normally fused together to form a solid mass of bone.

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the formula for momentum is velocity times mass

car :

1200 x 30 = 36000

truck:

2000 x 20 = 40000

Ans : truck has a greater momentum

Answer:

Two oxygen atoms

Explanation:

The majority of the oxygen in the air in our atmosphere consists of molecular oxygen ([tex]O_2[/tex]), which consists of 2 atoms of oxygen, since free oxygen mainly form covalent bonds with other atoms of oxygen.

A small fraction of the oxygen, however, in the ozone form, which consists of 3 atoms of oxygen bond together ([tex]O_3[/tex]).

Answer:

Central force motion

Explanation:

Answer:

Orbiting satellites are defined as the satellites that move around the earth in an elliptical path, and that takes the images and records the data of the various geological processes that undergo on the earth's surface. This is also helpful in obtaining the image of the celestial objects.

On the other hand, the moon is the natural satellite of earth, and that also revolves around the sun in an elliptical path.

These orbiting satellites and the moon orbit has something in common, that includes the balancing force. This balancing force is the force that balances the centripetal and the centrifugal force. Due to this balancing force, the satellites and the moon is able to maintain its constant circular motion. If these two forces are not balanced then either the satellites (or moon) will fall back on earth or it will move out of the earth's orbit.

The centripetal force is defined as the force that acts on a body which goes in a circular manner and is projected towards the centre of the body around which it moves. On the other hand, the centrifugal force refers to that apparent force which acts outside of a body that goes around a centre, that generates from the inertia of a body.

Only the shape of the juice will change (C), because liquids take the shape of any container you pour them into.

Pouring the juice from the bottle into the glass doesn't change its mass, stat, or volume.  So why should pouring it from the glass onto the floor change any of those things ?

When Ashlee spills the orange juice on the floor, the characteristic that changes is the volume of the juice.

The characteristic of the juice that will change when it spills all over the floor is its volume. When the glass breaks, causing the juice to spill, the volume of the juice will no longer be contained within the glass.

Hello,

Vinitial = 0

V final = 27 m/s

time = 8 seg

then

a = Delta(V) / Delta(t),

in other words:

a = (27-0)/8

a = 27/8

a= 3.375 m/s^2

Best regards

Hooke's law establishes that the elongation of a spring is directly proportional to the modulus of the force [tex]F[/tex] applied to it, as long as the spring is not permanently deformed:

[tex]F=k (x-x_{o})[/tex]    (1)

Where:

[tex]k[/tex] is the elastic constant of the spring. The higher its value, the more work it will cost to stretch the spring.

[tex]x_{o}[/tex] is the length of the spring without applying force.

[tex]x[/tex] is the length of the spring with the force applied.

According to this, we have a spring where only the force due gravity is applied.

In other words, the force applied is the weigth [tex]W[/tex] of the block:

[tex]W=m.g[/tex]   (2)

Where [tex]m=250g=0.25kg[/tex] is the mass of the block and [tex]g=9.8\frac{m}{s^{2}}[/tex]  is the gravity acceleration.

[tex]W=(0.25kg)(9.8\frac{m}{s^{2}})[/tex]   (3)

[tex]W=2.45N[/tex]   (4)

Knowing the force applied [tex]W[/tex] and [tex]x=18cm=0.18m[/tex] and [tex]x_{o}=0[/tex], we can substitute the values in equation (1) and find [tex]k[/tex]:

[tex]W=k (x-x_{o})[/tex]    (5)

[tex]2.45N=k (0.18m-0m)[/tex]    (6)

Finally:

[tex]k=13.61\frac{N}{m}[/tex]  

To find the spring's spring constant, we can use Hooke's law, which states that the force exerted by a spring is directly proportional to the displacement of the object. By plugging in the given values, we find that the spring constant is 13.61 N/m.

In this question, we're given a 250 g object that is hung onto a spring and stretches 18 cm. We can use Hooke's law to find the spring constant. Hooke's law states that the force exerted by a spring is directly proportional to the displacement of the object from its equilibrium position.

The formula for Hooke's law is F = -kx, where F is the force exerted by the spring, k is the spring constant, and x is the displacement.

Using the given information, we have the force exerted by the spring as F = (250 g)(9.8 m/s^2) = 2450 g m/s^2 = 2.45 N, and the displacement as x = 18 cm = 0.18 m.

Plugging these values into the formula, we get 2.45 N = -k(0.18 m).

Solving for k, we find k = -2.45 N / (0.18 m) = -13.61 N/m. However, since spring constants are always positive, the spring constant in this case would be 13.61 N/m.

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(NH4)_2 Cr_2O_7 ===> Cr2O3 + N2 + 4H2O

I think to balance this equation, all you need do is put a 4 in front of the water.

Element          # Right       #Left

N                          2                2

H                          8                8

Cr                         2                2

O                          3+4            7