a crane lifts a 450kg concrete to the top of a 50m building in 5s.assuming g=10m/s²,calculate a,the potential energy if the concrete​

Answers

Answer 1

Answer:

The answer is 225,000Joules


Related Questions

Brad is swimming in the ocean on a hot sunny day. He finds the water to be much colder than the sand on the beach, even though the sun is warning them both. Identify the reasons for brads observation

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Answer:

When Brad was swimming in the ocean and then he observed that the sand was more hotter than the water of the ocean. The water is colder than the sand because the water needs more energy as compared to sand to change its temperature. This is because the water has a higher specific heat than sand.

Explanation:

What could it be.... (science)

Answers

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeee

Which can be observed both on Earth and in an accelerating ship in space that is free from the effect of any gravitational field? Check all that apply.

chairs floating in midair

apples falling from trees

people's feet touching the ground

sky divers moving toward the ground

balls bending downward after being thrown​

Answers

Answer:

apples falling from trees people's feet touching the ground sky divers moving toward the ground  balls bending downward after being thrown​

Explanation:

When a space ship is accelerating in space, there is a force known as Inertia that kicks in. Inertia will mirror the effects of gravity on the ship even if there is no gravitational field effect such that anything that would happen where there is gravity, would continue to happen.

This means that apples will fall from trees, people's feet will touch the ground, sky divers will be pulled downwards and balls will bend downwards when thrown as well. These are the same effects expected on earth where gravity pulls things towards the earth's core.

Answer:

B,C,D,E

apples falling from trees

people’s feet touching the ground

sky divers moving toward the ground  

balls bending downward after being thrown

correct on EDGE2021

Heat can be transferred in several ways. Which of the following is an example of conduction? (DOK 2) A The sun is shining on a metal chair. B A fire in the fireplace is heating a room C Someone touching a hot metal pan DA hair dryer blowing your hair​

Answers

Answer:

Explanation:

G yvyvybybybububunununu

explica de que tipo es cada oración según la actitud del hablante

Answers

Answer:

Según la actitud del hablante las oraciones se clasifican en enunciativas, interrogativas, etc. ... adverbios o expresiones que complementan a toda la oración (COr): ojalá, quizá.

Explanation:

what do you mean by exercise​

Answers

Answer:

exercise mean any bodily activity that enhances or maintains physical fitness and overall health and wellness.

I hope it will help you

please help I found this confusing​

Answers

Answer:

A

Explanation:

brainliest

Answer: A

Explanation:

Calculate the distance between a 3.0 x 10^-5 charge and a 2.0 x 10^-6 2 points
C charge if the force between them is 1000 N.

Answers

Answer:

thanks for answer:)

Explanation:

The Grand Canyon is more than 400 km long and in some places almost 2 km deep. Which model best represents the main process that formed the Grand Canyon?

Answers

Answer: Diagram A

Explanation:

The Grand Canyon was created by the constant flow of the Colorado river which physically broke down the rock for billions of years. It then carried off the rock as it flowed and as it kept doing this, the canyon kept getting deeper and deeper.

This is what is described in the first diagram. The water from the faucet is carrying the soil along with it much like the Colorado did to the rocks of the Grand Canyon.

The table below shows the speed of sound waves from musical sound sources at 20°C. Which conclusion can be made based on the information in the table? Wave speed and wavelengths can vary inversely to produce the same frequency. Frequency and wave speed can vary directly to produce the same wavelength. Wavelengths and frequency can vary inversely to produce the same wave speed. Frequency and wavelengths can vary directly to produce the same wave speed. Mark this and return

Answers

Answer:

c

Explanation:

Answer:

C

Explanation:

Took it on edg

If a=15 m/s², m=2 kg, F=? *

30 N
30kg
30 m/s²
7.5 N

Answers

Answer:

F = 30 N

Explanation:

Cuantos CM son 8 newtons

Answers

Answer: Be more specific

Answer:

uno thos threse u here me

Explanation:

on which factor does gravitation between any two bodies depend?​

Answers

It depends on distance and size

Answer:

Gravitational force between two bodies depends on:

1. Masses of the two bodies. The greater an object's mass, the greater its gravitational force.

2. Distance of separation between them. The smaller the distance greater is the gravitational force.

Which scenario BEST describes an action-reaction pair? *
O A. A person pushes a cart and it rolls forward.
O B. A skateboarder pushes against the ground so she can move forward.
O C. An acrobat jumps on a trampoline and the trampoline moves downwards.
Both A and C

Answers

Answer:

C. An acrobat jumps on a trampoline and the trampoline moves downwards.

Both A and C

[tex] - trixiejane[/tex]

If a person has the genotype Rr for hair where red is dominant to blue, what phenotype would this person have?

Answers

the person's phenotype would be red hair. phenotype is what you see on the outside, genotype is what the dna says. <3

ELECTROMAGNETIC FIELDS PLAN AN INVESTIGATION LAB REPORT FOR EDG.!!!!! WORTH 100 POINTS????????

Answers

Answer:ummm ok

Explanation:I really don’t get it but ok

Answer:

so what do we need to do

Explanation:

Se dea caer una pelota de basquetbol desde una altura de 90 metros.Calcular: El tiempo en que demorara en caer y a velcidad con la que llega al suelo

Answers

Answer:

1. t = 4.24 s

2. [tex]v_{f} = 42.43 m/s [/tex]

Explanation:

Podemos encontrar el tiempo de caída con la siguiente ecuación:

[tex] v_{f} = v_{0} + gt [/tex]   (1)

En donde:

[tex] v_{f}[/tex]: es la velocidad final de la pelota  

[tex] v_{0}[/tex]: es la velocidad inicial = 0 (se deja caer)

g: es la aceleración debida a la gravedad = 10 m/s²

Debemos hallar primero la velocidad final. Podemos usar la ecuación:

[tex] v_{f}^{2} = v_{0}^{2} + 2gh [/tex]  (2)

En donde:

h: es la altura = 90 m

[tex] v_{f} = \sqrt{2gh} = \sqrt{2*10 m/s^{2}*90 m} = 42.43 m/s [/tex]

Entonces, la velocidad con la que la pelota llega al suelo es 42.43 m/s.

Ahora podemos encontar el tiempo que tarda en caer la pelota resolviendo la ecuación (1) para "t":

[tex] t = \frac{v_{f}}{g} = \frac{42.43 m/s}{10 m/s^{2}} = 4.24 s [/tex]

Por lo tanto, la pelota tarda 4.24 segundos en caer.

Espero que te sea de utilidad!

Give three examples of how biotechnology affects our everyday lives.
Write and complete sentences
Site your sources

Answers

Answer: But what about beer-brewing, crop breeding, and the antibiotic penicillin? These processes and products – some of which have been around for thousands of years – are also examples of biotechnology.

Explanation:

Specifically, industrial biotechnology uses enzymes and micro-organisms to make bio-based products in sectors such as chemicals, food ingredients, detergents, paper, textiles and biofuels. ... Since that time, industrial biotechnology has produced enzymes for use in our daily lives and for the manufacturing sector.

Can someone pls help me is for my study guide final?

Answers

Answer:

displacement means moving something or the occupation by a submerged body part or part of the body

whats the definition of Light speed

Answers

Is a fundamental physical constant that is the speed at which electromagnetic

Violet light (410 nm) and red light (685 nm) pass through a diffraction grating with d = 3.33 x 10-6 m. What is the angular separation between them for m = 2?​

Answers

Answer:10.03

Explanation:

right on acellus

12. You and a friend are playing a game of basketball. Explain why the

basketball appears orange, be sure to use terms reflected and absorbed

in your answer. [4]

Help me plssss I’m giving out brainlest and 10 points

Answers

Answer:

If the basket ball appears orange then it can be said that it reflects orange light

Explanation:

The color of the object reflected by an object is the color which is viewed by a viewer. Hence, if the basket ball reflects the orange color light , then the ball will appear orange in color to the viewer.

The light absorbed by the object has no role in deciding the color of the object visible to a viewer.

hence, if the basket ball appears orange then it can be said that it reflects orange light.

If heating 3 g of a substance by 2 °C requires X joules of heat, how much heat will be needed to heat 9 g of the same substance by 4 °C?

Answers

Answer:

Explanation:hffdghbjhhfgdvbjnjhjvcfgdfcvhjkm,kjjhgjh

q=mct, for this problem c is constant since the same object is being used. so first condition: x= 3 * 2 * c = 6c, second condition: y = 9 * 4 * c = 36c, where y is our answer. using these equations: y=6x , the answer is 6x

HELP!!!!!!!!!
A toy car has a motor capable of moving the car at 10m/s up a 35 degree ramp. If the motor exerts a force of 500N to the car, what is the power rating of the motor in kW?

Answers

Answer:

4.096 kW

Explanation:

Applying,

P = Fvcos∅................. Equation 1

Where P = Power of the motor, F = Force exerted on the motor, v = Velocity, ∅ = angle.

From the question,

Given: F = 500 N, v = 10 m/s, ∅ = 35°

Substitute these values into equation 1

P = 500×10×cos35°

P = 4095.8 W

P = 4.096 kW

Hence the power rating of the moto in kW is 4.096 kW

Does a battery produce electric currents?

Answers

Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

When a certain metal is illuminated with light of frequency 2.9 ✕ 1015 Hz, a stopping potential of 7.0 V is required to stop the most energetic ejected electrons. What is the work function of this metal?

Answers

Answer:

4.96 eV

Explanation:

Recall the Einstein photoeletric equation;

KE = E - Wo

Where;

KE = kinetic energy of the ejected photoelectron

E= energy of the incident photon

Wo = Work function

But

KE = eV= 1.6 * 10^-19 C * 7 V /1.6 * 10^-19 C = 7 eV

E = hf/e = 6.6 * 10^-34 * 2.9 ✕ 10^15 Hz/1.6 * 10^-19

E = 11.96 eV

Hence;

Wo = E - KE

Wo = 11.96 eV - 7eV

Wo = 4.96 eV

Does anyone got notes on Newtons Law of Universal Gravitation?​

Answers

Answer:

I swear I am not a bot! but I think people post some notes on g00gle as well there are many things you can find when searching

Explanation:

copy/paste

( I have NO idea if these will help you but I try)

https://www.richlandone.org/site/handlers/filedownload.ashx?moduleinstanceid=21002&dataid=21739&FileName=Gravitation%20Notes.pdf

https://www.physicsclassroom.com/class/circles/Lesson-3/Newton-s-Law-of-Universal-Gravitation

https://courses.lumenlearning.com/boundless-physics/chapter/newtons-law-of-universal-gravitation/

Which type of waves give scientists information about the structure of Earth's interior layers?

Answers

Answer:

Seismic waves

Think of earthquakes :)

A radioactive nucleus contains 128 nucleons. It emits a B-particle.
How many nucleons are now in the nucleus?
A
124
B 127
C 128
-D 129​

Answers

the answer would be c

Tidal energy is alternative source of energy. give reason​

Answers

Answer:

Tidal energy is alternative source of energy because the energy it produces is free and clean as no fuel is needed and no waste bi-products are produced. It has the potential to produce a great deal of free and green energy.

Other Questions
In the triangle below,y = [? ] cm. Round to thenearest tenth.15 cmX35909 The math team at Felix's school includes students from the sophomores, juniors, and senior classes. Felix wants to create a display to show the percent of students on the math team from each class. Which type of graph best represents the data?a: stem and leaf plot b: circle graphc: line graph please help , with the question on the picture who is the protagonist and antagonist in the book even if we break What does the abbreviation CD stand for? Ill give alot of points if you answer: How do I get a 100 dollar ps4 31. Bethany bought e pieces of Halloween candy that she gave out to her 5 friends. If shesave each friend 3 pieces, write and solve an equation to find how many pieces of candyBethany started with What were living conditions like for soldiers who fought in Vietnam DearAmerica: Letters Home from Vietnam? TAKING A SURVEY!Who's your favorite singer me: Billie Eilish probably Name 1 reason why the United States could not immediately get involvedin stopping Hitler A grindstone in the shape of a solid disk has a shaft attached to allow a force to be exerted on. The grindstone has a diameter of 0.650m and a mass of 55.0 kg. The shaft is 0.300 m from the center of the stone and has a mass of 4.00 kg. The grindstone has a motor attached and it is rotating at 450rev/min at a run when the motor is shut off. The grindstone comes to rest in 9.50 s.a. What is the moment of inertia of the grindstone including the shaft?b. What is the angular acceleration of the grindstone?c. What average torque is done by friction to bring the grindstone to rest?d. How many revolutions has it taken the grindstone to come to rest?e. What is the linear acceleration of the shaft in this process?f. What is the linear distance that the shaft traveled? Last week, the daily low temperatures for a city, in degrees Celsius, were 5, 8, 6, 5, 10, 7, and 1. What was the average low temperature? Show your reasoning. Which of the following is a correct example of the verb 'go' used as participle?A. I will not go to the museum because school trips are normally boring.B. I went to that museum already,so I will not go on the school trips this year.C. My friends gone on the trip to the museum and class is very boring.D. I should have gone to the museum today,instead of being stuck in class. Harry and Sally went to the museuma propositionc. subjectd conjunction 6. Explain the purpose of the League of Nations Jonah wants to make a one-sample zzz interval using 99%99%99, percent confidence to estimate what proportion of silicon wafers at his factory are defective. He wants the margin of error to be no more than 3%3%3, percent. A previous study suggests that about 6%6%6, percent of these wafers are defective.If we assume p^=0.06p^ =0.06p, with, hat, on top, equals, 0, point, 06, what is the smallest sample size required to obtain the desired margin of error? Question : Which of these stem and leaf plots would match the histogram data? Justify your answer. loud sounds means intense sounds? true or false Find the diameter of the object.diameter: ___ ft What is 4a+8b in simplified form?