while exploring an ancient mayan tomb, you discover that the walls begin to move and are closing in on you. by exerting 400 n of force, you are able to keep a wall from coming closer. the work you are doing on the wall is

Answers

Answer 1

Because the wall is not moving, the work you are performing on it is coming closer by exerting 400 n of force.

What work has been done to the wall?

Despite the man's forceful efforts, the wall does not budge. Work completed equals force applied times displacement, and since the wall's displacement is 0, work completed is also zero.

Is work completed when a wall is pushed?

When an object experiences force and is moved from its starting location, this is referred to as doing work. The Joule is the SI unit of work. A joule is defined as a newton of force applied to an object that results in a displacement of one meter. This signifies that when force is exerted to a wall, nothing is accomplished.

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Related Questions

What electromagnetic wave travels the fastest?

Answers

Answer:

C

Explanation:

Ultraviolet since it is a consumable of light

Question 6 of 10
If this vector were twice as long, what would be the coordinates of the tip?
O A. (1,-2)
O B. (-2, 1)
O C. (-4,2)
D. (2,-4)
PREVIOUS

Answers

The answer is c or b u choose

A globe (model of the Earth) is a hollow sphere with a radius of 16 cm. By wrapping a cord around the equator of a globe and pulling on it, a person exerts a torque on the globe of 120 N • m for 1.2 s. What angular momentum does the globe have after 1.2 s?

Answers

Answer:

144 kg m^2/s

Explanation:

A rock has a density of 2 g/mL and a mass of 17.5 g. What is the volume of the rock?

HELP PLEASE

Answers

D=m/v then v=m/d=17.5/2=8.75ml

An object has a weight of 1550N when it is on the surface of a planet of radius R. What will be the gravitational force on the object after it has been moved to a distance of 4R from the surface of the planet?

Answers

Answer:

W = 96.875 N

Explanation:

For this exercise let's use the law of universal gravitation

          F = [tex]G \frac{m M }{r^2}[/tex]

we substitute this force in Newton's second law

          F = m a

          G \frac{m M }{r^2} = m a

          a = [tex]G \frac{M}{r^2}[/tex]

This sidewalk we will call it gravity acceleration

           g₀ = a

the weight of a body is

         W₀ = m g₀

         

if we change the cario of r ’= 4r

          a’=  [tex]G \frac{M}{r'^2 }[/tex]

          a ’= G \frac{M}{(4r)^2 }

           a' = [tex]G \frac{M}{r^2} \ \frac{1}{16}[/tex]

          a ’=  [tex]\frac{g_o}{16}[/tex]

           

therefore the weight of the body must be

           W = m g = [tex]m \ \frac{g_o}{16}[/tex]

           W = W₀ / 16

            W = 1550/16

            W = 96.875 N

A car travels 9 km East, turns around, then travels 3 km West. What is the car's
DISPLACEMENT? *

Answers

Explanation:

I think you are 100℅ clear.

Plan an experiment to measure the ideal mechanical advantage of a three-hole punch. (a) What materials would you need? (b) What procedure would you use?

Answers

Answer:

A) Three hole punch and either a layered plastic or paper

B) Identify the lengths involved  ,

  Length of input arm / length of output arm = L1/ L2

Explanation:

a) Materials involved includes :

Three hole punch and either a layered plastic or paper

Identify the forces acting on the three-hole punch which are Input and output forces

Identify the points where they act

B) procedures involved

The mechanical advantage = output force / input force

step one:  Identify the lengths involved

assuming no friction or relatively small friction \

mechanical advantage can be calculated as : Length of input arm / length of output arm = L1/ L2

which lens have plus power ​

Answers

Answer:

Explanation:

A plus lens which is convex in shape, converges light and the accommodative system must relax in order to keep an image clear.

Robb wants to win the next sled race. He asks for your advice. What would you tell him he should change in order to win? Explain why your solution would work in terms of energy.

Answers

Answer: Start at the top of the hill.

Explanation:

The options include:

a. Start at the bottom of the hill.

b. Start at the top of the hill.

c. Start in the middle of the hill.

Sled racing is simply a winter dog sport racing. Since Robb wants to win the next sled race, the advice that'll be given to him is that he should start at the top of the hill.

Other options such as starting at the bottom of the hill or the middle of the hill are wrong.

state and explain the disadvantages of anomalous expansion of water​

Answers

Answer:

я не знаю старайся изо всех сил

Explanation:

[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]

[tex]\color{green}{\tt State \: and \: explain \: the \: disadvantages}[/tex]

[tex]\color{green}{\tt { of \: anomalous \: expansion \: of \: water}}[/tex]

[tex]\huge{\mathbb{\tt {ANSWER↓}}}[/tex]

[tex]{\boxed{\boxed{\tt { DISADVANTAGES \: of \: anomolous \: expansion \: of \: water }}}}[/tex]

Since the maximum density can be found for a positive temperature, water's own weight will prevent it from freezing from the bottom up. However, the anomalous expansion of water has some negative consequences. ... As the water freezes it expands and can rip pipes open.

[tex]{\boxed{\boxed{\tt { What \: is \: the \: state \: of \: anomalous \: expansion \: of \: water? }}}}[/tex]

The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense. The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph

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#JustEnjoyTheSummer

→XxKim02xX

The equation below shows a general equation for a reaction, and the amounts of the substance are written underneath.

AB + CD → AC + BD
(15 g) (?) (?) (10 g)

The total mass of the products is 50g. Which best completes the other two amounts?

The amount of CD is 40 g, and the amount of AC is 35 g.
The amount of CD is 35 g, and the amount of AC is 40 g.
The amount of CD and AC would be the same.
The amount of CD and AC is undetermined.

Answers

Explanation:

The amount of CD is 35 g, and the amount of AC is 40 g.

Explanation:

AB + CD \rightarrow AC + BDAB+CD→AC+BD

The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.

In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:

The amount of CD is 35 g, and the amount of AC is 40 g.

In fact, if we assume these masses are correct, we have:

- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g

- on the product side: m(AC)+m(BD)= 40g + 10g = 50g

so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.

Answer:

B is  the answer on edge

Explanation:

B: The amount of CD is 35 g, and the amount of AC is 40 g.

Which applications, either for diagnostic purposes or for therapeutic purposes, do not involve ionizing radiation? Check all that apply.

Answers

Answer: I do not know (is this an RP question? ;-;)

Explanation:

Answer:

Applications in which ionizing radiation are not used are  

MRI

ultrasound

laser surgery

Explanation:

hope its right

bestfriend

A car and a semi-truck are both traveling along a road. Based on Newton's 2nd law, what will happen if both cars apply the same type of brakes at the same time?

Answers

Answer: ask god in your prayers

Explanation: im here for the same reason you are

I DONT KNOW THE ANSWER

Answer:

The semi-truck will stop after the car.

Explanation:

It will do that because the semi-truck has more mass than the car.

How is the reflection of a light
ray from a plane mirror different from the
refraction of a light ray as it
enters a piece of glass?​

Answers

Explanation:

Because during reflection of light rays from plane mirror only bouncing back of light rays takes place while as during refraction of light rays through a block of glass bending of light rays occurs.

When you are sitting in a chair, your body exerts a _____
on the chair and the chair exerts the ____ force back.

it can either be:
force
friction
same
different
interacting objects
mass
or push

Answers

When you are sitting in a chair your body exerts a FORCE, the chair exerts the SAME force back.

An aluminum rod is 300m and at 25 degree Celsius. Calculate the change in rod
length at 45 degree Celsius

Answers

Answer:

Explanation:

540

Decribe the general shape of the graph.​

Answers

Answer:

the results increase, positive

1. Rearrange the equation for the area of a rectangle (A = l w) to solve for length, l.
Step 1


Step 2


Step 3


Step 4




2. Rearrange the equation for velocity v = d/t to solve for time, t.
Step 1


Step 2


Step 3


Step 4

Answers

http://www.panthercountry.org/userfiles/241/Classes/611/Rearranging%20Algebraic%20Equations.pdf


there’s a link

What can we say about the forces? A. They are balanced. B. They are unbalanced. C. They are not in equilibrium.​

Answers

You can say anything you want to about them without fear of contradiction. There's no information here to prove you wrong.

Calculate the momentum elephant of a 2020 kg elephant charging a hunter at a speed of 7.49 m/s .

Answers

Answer:

15129.8 Kg•m/s

Explanation:

From the question given above, the following data were obtained:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum is simply defined as the product of mass and velocity. Mathematically, it is expressed as:

Momentum = mass × velocity

With the above formula, we can obtain the momentum of the Elephant as follow:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum = mass × velocity

Momentum = 2020 × 7.49

Momentum = 15129.8 Kg•m/s

Thus, the momentum of the Elephant is 15129.8 Kg•m/s

A 100 L ball is blown up inside at 200K. It is then taken outside in the hot sun, and the volume increases to 150 L. What is the new temperature?​

Answers

Answer:

Temperature, T2 = 300 Kelvin

Explanation:

Given the following data;

Initial volume = 100 Liters

Initial temperature = 200 Kelvin

Final volume = 150 Liters

To find the final temperature T2, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making T2 as the subject formula, we have;

[tex] T_{2}= \frac{V_{2}}{V_{1}} * T_{1}[/tex]

Substituting into the formula, we have;

[tex] T_{2}= \frac{150}{100} * 200[/tex]

[tex] T_{2}= 1.5 * 200 [/tex]

Temperature, T2 = 300 Kelvin

Compare and contrast hydrogen fuel cell vehicles with vehicles that have intemal combustion engines.​

Answers

In a fuel cell vehicle, the hydrogen fuel is combined with oxygen. While the combustion in a hydrogen- or gasoline-powered engine is converted into mechanical energy, in a fuel cell vehicle, the chemical energy from the hydrogen and oxygen is converted into electrical energy.

A hydrogen fuel cell vehicle is different from internal combustion engine as in fuel cell, hydrogen combines with oxygen whereas in internal combustion engines, gasoline is used.

What are hydrogen fuel cell vehicles and internal combustion engines?

In a internal combustion engine or fuel cell vehicle, the hydrogen fuel is combined with oxygen atom. While the combustion in a hydrogen- fuel or in a gasoline-powered engine is converted into mechanical energy, however in the hydrogen fuel cell vehicle, the chemical energy from the hydrogen and oxygen is converted into electrical energy.

Both hydrogen internal combustion engines and the hydrogen fuel cells can power vehicles using hydrogen, a zero-carbon fuel. Hydrogen engines burn hydrogen gas in an internal combustion engine, in the same way as the gasoline is used in a power engine. Examples of hydrogen internal combustion engines include gasoline engines, diesel engines, gas-turbine engines, and rocket-propulsion systems.

Learn more about Internal combustion engines here:

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why don't planets crash into each other?​

Answers

Answer:Planets can't be in just any orbit, they have to be far enough apart so that they don't hit each other, and aren't drawn into collision by gravity

Explanation:

Atmosphere is key to gravity as they orbit .

A baseball is thrown with a speed of 36 meters per second (m/s). What is the distance from the mound to home plate if the ball takes 0.5 seconds to leave the pitcher's hand and cross the plate? A-72 B-18 C-41 D-31 Help me out please

Answers

Answer:

d = 18 m

Explanation:

Given that,

The speed of a baseball, v = 36 m/s

We need to find the distance from the mound to home plate if the ball takes 0.5 seconds to leave the pitcher's hand and cross the plate.

Let the distance be d. We can find it using the formula,

Speed = distance/time

or

[tex]d=vt\\\\d=36\times 0.5\\\\d=18\ m[/tex]

So, the required distance is equal to 18 m.

The tendency of an object to resist a change in motion is called ___________________
a.
displacement
c.
momentum
b.
inertia
d.
acceleration

Answers

the tendency of an object to resist a change in motion is called inertia


Auntie Sarah mops the floor by applying a force of 9N at an angle of 60° to the floor, How much work has she done
after mopping a total distance of 10m?

Answers

Answer:

9×1/2×10=45J

Explanation:

[tex]w = f \times d \times \cot( \beta ) [/tex]

f=9N

d=10m

cos(B)=1/2

En las olimpiadas del 2012 del colegio villapalos maria gano la carrera de los 100 m en 10,56 s y la de 200 m en 22,34 s ¿en cual fue mas veloz

Answers

Answer:

Fue mas velóz en los 100 m.

[tex]v_{1}=9.47\: m/s[/tex]

Explanation:

Tomando en cuanta que la definición de velocidad es:

[tex]v=\frac{\Delta x}{t}[/tex]

Donde:

Δx es el desplazamientot es el tiempo

La primera velodcidad esta dada por:

[tex]v_{1}=\frac{100}{10.56}[/tex]

[tex]v_{1}=9.47\: m/s[/tex]

La segunda velocidad sera:

[tex]v_{1}=\frac{200}{22.34}[/tex]

[tex]v_{1}=8.95\: m/s[/tex]

Por lo tanto, en el primer tramo fue más rápido.

Espero te haya ayudado!

The three main stages to the memory process are encoding, storage, and retrieval.
A.True B.False

Answers

Answer:

A

Explanation:

Answer:

a- true

Explanation:

i did the test and its correct

neeeeeeddddddssssshelp

Answers

Answer:

valence

Explanation:

Calculate the force of an object shot in the air with a mass of 2 kg and an acceleration of 9.81 m/s2.

Answers

Answer:

Force = 19.62 Newton

Explanation:

Given the following data;

Mass = 2kg

Acceleration = 9.81 m/s²

To find the force;

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

Substituting into the formula, we have;

Force = 2 * 9.81

Force = 19.62 Newton

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Assuming that no student is permitted to leave the exam room before they complete the exam and that each student works on the exam the entire time they are in the exam room and leaves the exam room immediately upon completion of the exam, which of the following could be determined using the information collected and only this information? Choose all that apply. O the student or students scoring the highest grade on the exam O the number of students taking less than one hour to complete the exam O the amount of time the exam issued to you was in your possession O whether or not a student answered all of the questions on the exam Maximum Discount Product A department store maintains data on customers, products and purchase record in three tables CUSTOMER PRODUCT, and PURCHASE. The store manager wants to know which product is on maximum discount for each category. Write a query to print the following fields for each category, ordered by category, ascending Category, product ID and discourse for the product that has the maximum discoun in the category. In the case of multiple products having same maximum discount within a category, print the product with minimum product_id Table Schema CUSTOMER Name Type Description CUSTOMER_ID Integer A customer's ID in the inclusive range 1 S00). This is a primary key CUSTOMER NAME String A customer's name. This field contains between 1 and 100 characters (inclusive) RE 2% NTSC al 14 17 ESC N o DI D- Q $ A % 5 N 3 6 CUSTOMER Name Description Type A customer's iD in the inclusive range 11 500). This is a primary CUSTOMER ID Integer key. CUSTOMER_NAME String A customer's name. This field contains between 1 and 100 characters (inclusive) CITY String A city name. This field contains between 1 and 50 characters (inclusive) STATE String A state name. 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