Algebraic expression​

Answers

Answer 1

In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations. For example, 3x² − 2xy + c is an algebraic expression.

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Tristan is an engineer working on a design for a new roller coaster. He wants the car to shoot out of the station very fast but needs a superconductor to be able to accomplish this. He is looking at different materials to use on the tracks of the roller coaster. What is necessary for his material to function as a superconductor? Check all that apply. ОТ< То a solid metal conductivity a very cold temperature a low boiling point no resistance

Answers

Answer:

Superconducting materials can transport electrons with no resistance, and hence release no heat, sound, or other energy forms. Superconductivity occurs at a specific material's critical temperature (Tc). As temperature decreases, a superconducting material's resistance gradually decreases until it reaches critical temperature. At this point resistance drops off, often to zero, as shown in the graph at right.

Explanation:

2. Compare and Contrast A fault cuts through
two layers of rock. Above sits a layer of sand-
stone. How does the age of the fault compare
to the ages of all three rock layers?

Answers

Explanation:

The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. The fault labeled "E" cuts through all three sedimentary rock layers (A, B,and C) and also cuts through the intrusion (D). So the fault must be the youngest formation that is seen and known of.

The age of the fault A is in between rock B and intrusion D. Hence A is the youngest rock and C be the oldest rock here.

What are faults?

A fault is a crack or region of cracks that separates two rock blocks. The blocks might move in relation to one another due to flaws. This movement may happen suddenly, like an earthquake, or it may happen gradually, like creep.

From a few millimeters to thousands of kilometers, faults can vary in length. Over geologic time, most faults cause recurrent displacements. The rock on one side of the fault abruptly shifts in relation to the other during an earthquake. The fault surface may be vertical, horizontal, or at any other arbitrary angle.

The principal of superposition states that, the oldest layer will be the bottom of the young rocks. Here, rock is A is above B and C. Hence, rock A is youngest than layer B and C.

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The related image is attached below:

which is more bussin? mcdonald’s or taco bell

Answers

Answer:

Coming from my perspective sence I see the lines are super long during lunch I would have to say McDonald’s

Drag each tile to the correct box.
Adam takes a bus on a school field trip. The bus route is split into the five legs listed in the table. Find the average velocity for each leg of the trip. Then arrange the legs of the trip from highest velocity to lowest.

Leg Distance (km) Time (min)
A 18 9
B 25 15
C 24 8
D 48 12
E 15 7

Answers

^^ what that guys said

A friend of yours who is traveling the world reports that she recently experienced a day on which the surface wind blew from the southeast while simultaneously the clouds overhead were moving from east to west. Independently, she is made aware of the fact that on that day the PGF was the same at the surface and at the cloud height. What hemisphere was she in at the time

Answers

Answer:

At that time, she was in the southern hemisphere

Explanation:

She is witnessing the southeastern trade breeze because the cloud is passing from east to west and she is also witnessing a storm from the southeast.

Because of the Coriolis effect, which deviates the atmosphere in the left-hand side of the southern hemisphere and generates a southeastern wind, this wind did not blow directly from south to east.

can the mass of an object is measured by a scale?​

Answers

Answer: In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.

Explanation:

In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.

If distance between particle become half, the electric force

Answers

The force between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Hence, if distance between charges is halved (charges remaining kept constant), the force between the two charges is quadrupled.

A particle of mass M is moving in the positive x direction with speed v. It spontaneously decays into 2 photons, with the original particle disappearing in the process. One photon has energy 233 MeV and moves in the positive x direction, and the other photon has energy 21 MeV and moves in the negative x direction. (5) (a) Draw a picture of this process. What is the total relativistic energy of the particle before its decay

Answers

Solution :

Mass of the particle = M

Speed of travel = v

Energy of one photon after the decay which moves in the positive x direction = 233 MeV

Energy of second photon after the decay which moves in the negative x direction = 21 MeV

Therefore, the total energy after the decay is = 233 + 21

                                                                           = 254 MeV

So by the law of conservation of energy, we have :

Total energy before the decay = total energy after decay

So, the total relativistic energy of the particle before its decay = 254 MeV  

A coin is resting on the bottom of an empty container. The container is then fi lled to the brim three times, each time with a diff erent liquid. An observer (in air) is directly above the coin and looks down at it. With liquid A in the container, the apparent depth of the coin is 7 cm, with liquid B it is 6 cm, and with liquid C it is 5 cm. Rank the indices of refraction of the liquids in descending order (largest fist).

a. nC, nA, nB
b. nA, nB, nC
c. nB, nA, nC
d. nC, nB, nA
e. nA, nC, nB

Answers

when we placed in the container of real depth assuming = d

if the container filled with liquid A then its apparent depth d' = 7cm

so the refractive index nA = real depth / apparent depth

                                       = d/7cm = 0.1428d

if the container filled with liquid B then its apparent depth d' = 6cm

so the refractive index nB = real depth / apparent depth

                                       = d/6cm = 0.166d

if the container filled with liquid C then its apparent depth d' = 5cm

so the refractive index nC = real depth / apparent depth

                                       = d/5cm = 0.2d

Since the refractive index is inversely proportional to the apparent depth

then the refractive indices are nC > nB > nA

may anyone please help me with all of this side of the packet?:) ill give all my points for this :(

Answers

Answer: 4 is b 8 is c

Explanation:

____ is the amount of matter an object and the mass of an _____ does not change location.​

Answers

Answer:

Mass

Object

Explanation:

Answer:

Mass is the amount of matter in an object and the mass of an object does not change location.

Give 3 combinational logic circuits on basic electronic devices that can be found at home.

Answers

Answer:

Leds switchs battery

Explanation:

....................

Answer: ptop tv calculator

Explanation:

A Boulder drops in the water and creates a wave with a period of 2s/cycle and a wavelength of .75 m/cycle. How fast is the wave moving ?

Answers

Answer:

v = 0.375 m/s

Explanation:

Given that,

The wavelength of a wave is 0.75 m/cycle

The period of a wave is 2s/cycle

We need to find the speed of the wave. We know that,

[tex]v=\dfrac{d}{t}[/tex]

Substitute all the values,

[tex]v=\dfrac{0.75}{2}\\\\v=0.375\ m/s[/tex]

So, the speed of the wave is equal to 0.375 m/s.

PLEASE HELP! I'LL GIVE BRAINLEST. PLEASE A RIGHT ANSWER​

Answers

Answer:

The answer is a - is the amount of matter in this object

Explanation:

an example of a household appliance with a low and high power rating​

Answers

Answer:

Explanation:

There are countless household appliances in every single house. One appliance with a low power rating would be a ceiling fan. On average ceiling fans consume roughly 60w and are found in the majority of houses. On the other side of the spectrum, we have a high power-rating appliance such as a microwave. Microwaves use anywhere between 1000w to 1800w of power in order to function correctly. This is very large power consumption and one of the highest power ratings found for appliances in a household.

How do simple machines make it easier to move an object?

Answers

Answer:

by Multiply Force,change direction and speed multiply

What is the equivalent resistance of the circuit pictured below?

Answers

Answer:

450 since in series we add the resistance

450 ohms resistance in series adds up

Sound is a longitudinal wave that travels at speed 343343m/s in dry air at room temperature and standard pressure. Your ear is capable of differentiating sounds that arrive at the ear just 1.00 milliseconds apart. What is the minimum distance between two speakers that produce sounds that arrive at noticeably different times

Answers

Answer:

d = 0.343 m

Explanation:

Given that,

The speed of a longitudinal wave, v = 343 m/s

Your ear is capable of differentiating sounds that arrive at the ear just 1.00 milliseconds apart.

We need to find the minimum distance between two speakers that produce sounds that arrive at noticeably different times.

Let the distance be d. So,

[tex]d=v\times t\\\\=343\times 10^{-3}\\\\=0.343\ m[/tex]

So, the required distance is equal to 0.343 m.

20. What type of simple machine is an ax?
O wedge
O inclined plane
O wheel and axle
O lever

Answers

The answer is (Wedge)

Answer:

The answer will be A. Wedge

Explanation:

A 10v battery is connected in series with 2 resistors. R1 is 1 ohm and R2 is 4 ohms. What is the current that goes across R1?

Answers

Answer:

Current in circuit = 2 amp

Explanation:

Given:

Voltage of battery = 10 V

First Resistance R1 = 1 ohm

Second Resistance R2 = 4 ohm

Resistor connected in series

Find:

Current in circuit

Computation;

Resistor connected in series

So,

Total resistance R = First Resistance R1 + Second Resistance R2

Total resistance R = 1 ohm + 4 ohm

Total resistance R = 5 ohm

Current in circuit = V / R

Current in circuit = 10 / 5

Current in circuit = 2 amp

Which statement is true of a catalyst in a reaction?

A. It acts as a reactant, in place of the original reactant.

B. It gets used up in the reaction.

C. It changes the activation energy required for the reaction.

D. It makes a reaction faster by adding energy.

Answers

Answer:

Hello There!!

Explanation:

The answer is=>C. It changes the activation energy required for the reaction.

hope this helps,have a great day!!

~Pinky~

The true statement for a catalyst used in a reaction is that it makes a reaction faster by adding energy. The correct option is D.

What is a catalyst?

A catalyst is a substance that increases the chemical reaction rate without undergoing any permanent chemical change in itself. It makes the reaction faster.

The correct option is D.

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Which term describes the amount of energy that is used in a circuit each second?
A. Power
B. Current
C. Voltage
D. Resistance​

Answers

Answer:

Power

Explanation:

On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3 , length 95.0 cm and diameter 2.00 cm from a storage room to a machinist. Calculate the weight of the rod, w. Assume the free-fall acceleration is g

Answers

Answer:

[tex]22.84\ \text{N}[/tex]

Explanation:

[tex]\rho[/tex] = Density = [tex]7800\ \text{kg/m}^3[/tex]

h = Length of rod = 95 cm

d = Diameter of rod = 2 cm

r = Radius = [tex]\dfrac{d}{2}=1\ \text{cm}[/tex]

g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]

V = Volume of rod = [tex]\pi r^2h[/tex]

Mass is given by

[tex]m=V\rho[/tex]

Weight is given by

[tex]w=mg=V\rho g\\\Rightarrow w=\pi r^2h\rho g\\\Rightarrow w=\pi\times (1\times 10^{-2})^2\times (95\times 10^{-2})\times 7800\times 9.81\\\Rightarrow w=22.84\ \text{N}[/tex]

The weight of the rod is [tex]22.84\ \text{N}[/tex].

What are fossil fuels composed of
Oxygen and carbon

Rocks under extreme pressure

Remains of living things

Answers

Answer:

C. Remains of living things

Explanation:

They are made up of dead animals or plants. Coal, Oil, and Natural Gas are the three types of fossil fuels and all of them come from dead organisms. Even the name Fossil Fuels, sounds like a name for something like this.

Hope this Helps ʕ•ᴥ•ʔ

Answer:

C

Explanation:

took the test

Dominant alleles are _____.

Only expressed if paired with a recessive allele


Only expressed if paired with another dominant allele


Always expressed


Never expressed

Answers

They're always expressed.

A 70.0 kg sprinter accelerates at a rate of 5.00 m/s2. What is the net force generated by the sprinter?

Answers

Answer:

F = 350 N

Explanation:

Force Equation

F=ma

Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour per second, millimeters per second2, etc.) could certainly be used as well - the calculation is the same regardless.

How to solve

Formula: FNet = Fa + Fg.

F = m * a

F = 70.0 kg × 5.00 m/s2

F = 350 N

Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

Explain Newtons Second Law of motion in terms of momentum.

Answers

Answer:

the net external force equals the change in momentum of a system divided by the time over which it changes. The change in momentum is the difference between the final and initial values of momentum.

Explanation:

i hope it will help

The height of a tree is 4 m.
Another tree is 30% shorter.
Find the height of the shorter tree in metres and centimetres.​

Answers

Answer:

1.2

Explanation:

4/100 × 30= 1.2

Look at the distance-time graph below. It shows Angela's journey as she walks to the end of the road and back. The gradient represents Angela's __________. What one word completes the sentence?

Answers

Answer:

The gradient here represents Angela's Velocity.

Explanation:

A distance-time graph has distance on its y-axis and time on its x-axis. Therefore, the gradient of the distance-time graph is given by the following formula:

[tex]Gradient = \frac{Change\ on\ y-axis}{Change\ on\ x-axis} \\\\Gradient = \frac{Distance\ Covered\ by\ Angela}{Time\ taken\ to\ cover\ the\ distance}\\\\Gradient = Angela's\ Velocity[/tex]

Since the rate of change of distance is called the velocity.

Therefore, the gradient here represents Angela's Velocity.

1: Which person is not doing work?
O A. A person climbing a hill
O B. Someone climbing stairs
O C. A person lifting a bag of sand
O D. A person holding a baby

Answers

Answer:

D

Explanation:

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