**Answer:**

[tex]5,480\:\text{N}[/tex]

**Explanation:**

The formula for work is given by [tex]W=F\Delta x[/tex], where [tex]F[/tex] is the force applied over a distance of [tex]\Delta x[/tex].

Plugging in given values, we get:

[tex]16,700=F\cdot 3.05,\\F=\frac{16,700}{3.05},\\F\approx \boxed{5,480\:\text{N}}[/tex](three significant figures).

Pretend you are designing your own home. You often get cold in the winter and want to make this house as energy efficient as possible to keep you warm. Use your knowledge about energy transfer and describe at least 3 things you would include in the design of your home. Be sure to explain why you would include these things.

**Answer: **

I would include extra insulation, a heating system, and some snug-fitting sweaters.

**Explanation: **

that way i won't get cold

the court that has the executive power on review cases from regional trial courts

**Answer:**

courts of appeals

**Explanation:**

hope this helps

DUE IN 4 HOURS! HELP! WILL MARK BRAINLIEST IF DONE WITHIN THE HOUR!

Maisey is running 12mph and comes to an abrupt stop in 3 seconds when she hears her name called. What is her acceleration?

**Answer:**

~ 0.001 m/s^2

**Explanation:**

If you convert 12 miles per hour to, miles per second, it makes this easier to calculate, so do that first

12m/ 1 hour * 1 hour/ 60 mins * 1 min/ 60 sec = ~0.003333 miles per second.

Next remember that acceleration = velocity/time

So our new velocity: 0.003333 over time: 3 seconds = the acceleration.

0.003333/3 = 0.001 m/s^2

A power source of 6.0 V is attached to the ends of a

capacitor. The charge is 12 C.

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

Plz help me with this question ASAP

ok i dont know to be honest

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

It is increased.

It is conserved.

It is decreased.

It is created.

2. It is conserved

Hope this helps

Hope this helps

**Answer:**

B..it is conserved

**Explanation:**

Mr. Cudd tries riding a bike to see if he still remembers how. As he gains some speed, he accidentally squeezes the front brakes. What happens immediately after is an example of which one of Newton’s laws?

**Answer:**

Newton's second Law of motion

What do the arrows in this photograph represent?

A. Gravity and air resistance

B. An action-reaction force pair

C. A pair of unbalanced forces at work

D. Friction and air resistance

Answer: B An action-reaction force pair

Explanation: Took the exam

The arrows in this photograph represent: An **action-reaction force pair**. Hence,** option (B) **is correct.

When two bodies interact, they exert an equal and opposite force on one another in accordance with** Newton's third law** of motion.** Action-reaction forces **are made up of these forces.

"When one body exerts a **force **on the other body, the first body experiences a **force **that is equal in magnitude in the opposite direction of the **force **which is exerted," according to **Newton's third law **of motion.

According to the above assertion, there are always two** forces o**perating on the objects involved in an interaction. The forces are of identical magnitude, but the **direction **of the **force **acting on the first object is different from the **direction **acting on the second.

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A body accelerates uniformly from rest at 2ms² for 5 seconds . calculate its average velocity in this time.

**Answer:**

0.4

**Explanation:**

average velocity =d/t

2/5=0.4

0.4m

A desk with a mass of 40kg is being pushed across the classroom and it accelerates at a rate of 5m/s squared . What is the force being applied to the desk?

8 J of work. This is the force applied

Consider a gate whose Shape is a parabolic arch of height 3m and base width 3m. If the origin of the coordinate system is at the vertex, then what is the equation of the edge of the gate?

**Answer:**

An arch in a memorial park, having a parabolic shape, has a height of 25 feet and a base width of 30 feet.

The equation of the **parabolic arch** with the** height** of 3m and** base width **of 3m is x²= 3/16 y.

Any point on a **parabola **is at an equal distance from both the focus, a fixed point, and the directrix, a fixed straight line. A parabola is a U-shaped plane curve. An essential component of a** conic section** is a parabola.

A **parabola** is formed by cutting a right circular cone in half along a plane perpendicular to the **cone's generator**. It is a locus of a moving point whose separation from the focus is equal to its separation from a stationary line (directrix) Focus refers to the fixed point, and **directrix **refers to the fixed line.

The equation of a **parabola** is x² = 4ay.

Height of the arch = 3 m

base width = 3 m

thus it goes through the point (3/2, 3)

then, (3/2)² = 4 a 3

a = 9 / (4× 12) = 3 /16

Then the equation of the** parabolic arch** becomes x² = 3/16 y.

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Please help this is really confusing

The correct answer is b , the the liquid with heat and cool faster

what is a possible explanation for a set of facts that can be tested by further investigation called?

1. Questions

2. Hypothesis

3. Experiment

4. Summary

Answer:

Hypothesis.

Explanation:

Not a question, not a summary, and not an experiment.

How is a mixture different from a compound?

**Answer:**

MIXTURE

1 In a mixture two or more substances are mixed together (elements or compounds)

2Therd is no fixed proportion of the constituents

3 The mixture may or may not be homogenous

4 There is no chemical reaction between the constituent substances

5 There cannot be a chemical formula for a mixture

6 Heat or any other type of energy is not required or released during the formation of a mixture

7 The constituents can be separated using simple physical processes

8 The properties of the constituents are retaied

COMPOUND

1 Two or more elements form a compound

2 The constituent elements combine in a definite proportion to form a compound

3 The elements are in a definite proportion in any part or fraction of the compound

4 There is a chemical reaction in the formation of a compound

5 A compound has always a chemical formula for a compound

6 Heat orany other energy is often required for the formation of a compound or released during the formation of a compound

7 The constituent elements can't be separated using simple physical processes in case of a compound

8 The properties of the constituent elements are not retained in the compound

A canoe moving down the river with a kinetic energy of 5J and a speed of 0.5m/s. What’s the mass of the canoe

4.16356553610438833654693

Explain What is electrical energy and why do we need this energy

**Answer:**

How fast is a 90kg man running if his kinetic energy is 720 J?

Answer:

4 m/s

Explanation:

KE=1/2mv^2

720=1/2(90)

720=45v^2

divide by 45

16= v^2

over the square root

4=v

v= 4m/s

4 m/s

Explanation:

KE=1/2mv^2

720=1/2(90)

720=45v^2

divide by 45

16= v^2

over the square root

4=v

v= 4m/s

Which of the following choices is NOT a common injury in sports?

A.

concussion and muscle strains

B.

hemorrhage and arthritis

C.

ligament sprains and tears

D.

bone fractures and ankle sprains

B isn’t arthritis is caused when you get older but in this case it’s not b and hemorrhage is possible but not arthritis

The choice that is not a common **injury** in **sports** is **hemorrhage** and **arthritis**. Details about **injuries** can be found below.

**Sport** is any activity that uses **physical** **exertion** or skills **competitively** under a set of rules that is not based on aesthetics.

**Injuries** are bound to occur during **sporting activities** and they are as follows:

**Hemorrhage,**** **which refers to the heavy release of blood within or from the body and **arthritis,**** **which is an **inflammation** of a joint or joints are not common** ****injuries** involved in **sports**.

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A student observes a shadow move across the sun during a solar eclipse. Which list represents the position of Earth, the sun, and the

moon during this event?

A.sun, Earth, moon

B.moon, sun, Earth

C.Earth, sun, moon

D.sun, moon, Earth

It goes sun moon earth the moon is blocking us from seeing the sun.

The position of the **Earth**, Sun, and moon during the **solar **eclipse, a student observes a shadow moving across the sun is Sun, **moon**, Earth, so **option **D is **correct**.

When the Moon passes in front of the Sun, blocking all or part of Earth's view of it, a **solar eclipse **occurs. The Moon is closest to the plane of the Earth's orbit when there is a new moon and such an alignment. During a total eclipse, the Moon fully obscures the Sun's disk. Partial and annular eclipses only block out a section of the Sun. A **solar eclipse **occurs naturally. Solar **eclipses **were sometimes linked to supernatural sources or interpreted as an ill omen in several ancient and modern societies.

During a solar eclipse, the moon comes in between the earth and the sun therefore the shadow moves across the sun during a solar eclipse observed by the student, the position is Sun, moon, and earth.

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Which of the following materials does not experience any force when it is brought near a magnet?

1) Iron

2) Silk

3) Steel

4) Cobalt

Please fast, I need help.

Silk because it’s not a metal

**Answer:**

silk , it is a type of fibre

Question 1 of 14 Which of the following statements describes a perfectly inelastic collision? O A. An ice hockey player picks up a trophy as he slides past it. O B. A baseball bat hits a baseball into the outfield. O C. A surfer falls off of his surfboard when a wave hits him. D. Two birds collide in midair and fly off in different directions.

Answer: A. An ice hockey player picks up a trophy as he slides past it

Explanation:

A PE X

The statement that best describes a **perfectly inelastic collision** is

C. A surfer falls off of his surfboard when a wave hits him.

What is collision?A **collision **is the interaction between two bodies in such a way that the momentum and velocity of one body gets changed due to the presence of other body. There are three types of collision-

1.** Elastic collision**

2. **Inelastic collision**

3.** Perfectly inelastic collision.**

In all types of** collision** , the momentum of the system before **collision** and after** collision** always remains same or we can say that momentum is conserved in **collisions**

An **elastic collision** is the one in which kinetic energy is also conserved and **coefficient of restitution** is one. Both the bodies move separately with different velocities after **elastic collision.**

In **inelastic collision** there is a loss of kinetic energy and **coefficient of restitution **is less than one.

In **perfectly inelastic collision** there is maximum loss of kinetic energy and **coefficient of restitution** is zero. Both the bodies stick together after **collision** and move with same velocity

**Coefficient of restitution **is the ratio of relative velocity of separation after **collision **to relative velocity of approach before **collision**.

A surfer falls of his surfboard when a wave hits him is an example of **perfectly inelastic collision **because in this when water hits the surfers he falls of and sticks to the water , and will also now move with the velocity of water .

So when the surfer falls off his surfboard when a wave hits him is **perfectly inelastic collision**.

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If the radius of Earth were one half what it is now, and the mass were the same, what would be the value of g?

**Answer:**

4 times what it is now.

**Explanation:**

g=G(M/r^2)

G is constant, so ignore.

We have (1M/0.5r^2), or 4.

**Answer:**

4g

**Explanation:**

the equation of g (field gravity)

g = G M/R²

because G (Contant of Gravitasion) and M (Mass of earth) same, them

g2/g1 = R1²/R2²

g1 = g now

g2 = g which the value we looking for

g2/g = 1/(1/2)²

g2/g = 1/(1/4)

g2/g = 4

g2 = 4g

What is the first step in cell division?

Daughter cells create copies of their components.

Daughter cells grow in an unregulated fashion.

Parent cells are created from daughter cells that split.

Parent cells create copies of their components.

**Answer:**

d

**Explanation:**

**Answer:**

D.)

Parent cells create copies of their components.

**Explanation:**

edge2021

what type of particle carries an electric current through a wire

electrons. Oww

..........

..........

Independent practice

1.

a.

2.

Calculate the density p (in kg/m) for each of the following:

m = 10 kg and V=10 m3

b. m = 160 kg and V = 0.1 m3

C. m = 220 kg and V = 0.02 m3

A wooden post has a volume of 0.025 m' and a mass of 20 kg. Calculate its

density in kg/m

Challenge. A rectangular concrete slab is 0.80 m long, 0.60 m wide and 0.04

m thick. |

Calculate its volume in m?,

b. The mass of the concrete slab is 180 kg. Calculate its density in kg/m.

3.

a.

**Explanation:**

**formula****:** Mass

Density x volume

**2a) m=10kg v=0.3m³**

10÷0.3=33.3 kg/m

**2b) m = 160 kg V=0.1m³**

160÷0.1=1600 kg/m

**2c) m = 220 kg V = ****0.02m³**

220÷0.02=11000 kg/m

**A wooden post has a volume of 0.025****m³**** and a mass of 20kg. Calculate its**** ****density in kg/m****.**** **

density = volume ÷ mass

20÷ 0.025=800 kg/m

**Challenge****:**** A rectangular concrete slab is 0.80m long, 0.60 m wide and 0.04m thick.**** ****Calculate**** ****its**** ****volume**** ****in**** ****m³****.**** **

** ****Formula**** **: Length x width x height = Volume

0.80 x 0.60 x 0.04 = 0.0192m³

**B****)**** ****The mass of the concrete slab is 180 kg. Calculate its density in kg/m.**

density = volume ÷ mass

180 ÷ 0.0192 = 9375 kg/m

The Escape speed at the surface of a certain planet is twice that of the earth. If the planet has radius twice of the Earth. what is its mass in unit of earth's mass?

**Answer:**

1.32 × 1022 short tons

**Explanation:**

hope this helps

The required **mass **of the **planet **is 8 times the mass of the earth.

Given that,

The Escape speed at the surface of a certain planet is twice that of the earth. The planet has a radius twice of the Earth. what is its mass in unit of earth's mass is to be determined.

An **object **with this **velocity **at the earth's surface will completely escape the earth's **gravitational field**, even after accounting for atmospheric losses.

here,

The escape velocity of the planet = 2 Escape velocity of the earth

[tex]\sqrt{{2GM_p}/r_p} = 2\sqrt{2GM_e/r_e}[/tex]

Substitute the values and square both sides,

[tex]{{2GM_p}/2r_e} = 4*{2GM_e/r_e}\\M_p = 8M_e[/tex]

Thus, the required mass of the **planet **is 8 times the **mass **of the earth.

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When Maria rubbed her solid graphite pencil against paper, it easily left a clear streak on the paper. Which model could represent graphite?

Answer:

B

Explanation:

:p

**Option B **is the correct answer.

**Graphite **has a layered structure, every **layered **structure has rings which consists of **six carbon **atom.

Graphite can be also known as **black lead**. As it can be structured with **hexagonal **shape it was also made as **octahedral **and tetrahedral which is known to be as **diamond**. Graphite is formed by **carbonaceous **compound, which can be **solidified **as **magmatic **carbon. Graphite can be taken from several ancient **rocks**, marbles, quartzite, under the soil, etc.. The graphite can be found easily by seeing the **honeycomb **shape, hexagonal structure, a molecule with **six carbon **atoms. These were also used in **pencil leads**, batteries, nuclear reactors, polishes, etc..

So, when **Maria **rubbed her solid graphite pencil against paper, it easily left a clear streak on the paper **because **of the atom **presence **and it **hexagonal honeycomb **structure.

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PLS ANSWER FAST WILL GIVE BRAINLY!!!

How can you know if something has energy?

**Answer:**

You'll see it without noticing

**Explanation:**

for example: Magnets can pull to one thing, but using the other side of the magnet with the other magnet can push away the magnets, and turn it to their way of pulling, also electricity, movement, were making energy everyday, just by moving

motion is the act of ___

the options are movement, feeling, chemical engergy and sleep

it’s movement i believe :)

**Answer:**

hi

**Explanation:**

Please help, is an electric lamp a luminous object?

electric bulbs are definitely luminous objects so yes, i presume so!

Electric lamp why yes it is

[tex]81 \frac{1}{2} \times 121 \frac{1}{2} [/tex]
Which figures appear to be congruent?An image of 5 triangles on a 14 by 12 grid is shown.Triangle 1 has a base that is 4 units long. The upper vertex is 4 units above the midpoint of the base. To the right, triangle 2 has a horizontal leg that is 3.5 units long and a vertical leg that is 4 units long. A small square is positioned in the triangle at the lower left vertex. Below triangle 1, triangle 3 has a horizontal leg that is 3.5 units long and a vertical leg that is 4 units long. A small square is positioned inside this triangle at the upper right vertex. Triangle 4 is toward the center of the grid. It has a horizontal leg that is 1 unit long and a vertical leg that is 4 units long. A small square is positioned inside this triangle at the upper right vertex. Triangle 5 is to the lower right. It has a horizontal leg that is 6 units long and a vertical leg that is 4 units long. A small square is positioned inside this triangle at the lower left vertex. A. 1, 2, and 3 B. 1 and 4 C. 1 and 5 D. 2 and 3
Why might some people think communism is a better way to run an economy
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A compound contains 0.5 mol Na, 0.5 mol N, and 10 mol H. The empirical formula of thecompound is -
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