In the figure, a 700-kg crate is on a rough surface inclined at 30°. a constant external force p = 5600 n is applied horizontally to the crate. as the force pushes the crate a distance of 3.00 m up the incline, the speed changes from 1.40 m/s to 2.50 m/s. how much work does gravity do on the crate during this process?

Answers

Answer 1

This problem might be confusing since there are a lot of given variable but we must take note that the problem only asks about the Work done by gravity, therefore:

Work = - Potential Energy

Where,

Potential Energy = mass * gravity * height

Note: It is negative since it is gravity doing the work on our system, not work being done on gravity.

 

Since the surface is inclined at 30 degrees, therefore:

height = 3 m * sin 30

height = 1.5 m

Calculating for Work:

Work = - 700 kg * 9.8 m / s^2 * 1.5 m

Work = - 10,290 J

Work = -10,300 J

Answer 2

Work do on the crate by gravity : W = -10290 J

Further explanation

Work is the transfer of energy caused by the force acting on a moving object

Work is the product of force with the displacement of objects.

Can be formulated

W = F x S

W = Work, J, Nm

F = Force, N

S = distance, m

Force and displacement of objects are vector. Multiplication of both is in accordance with the dot product concept of two vectors. Whereas W is a scalar quantity. Then if there is an angle formed by the force F and the displacement S is θ, then it can be formulated

W = F cos θ.S

There are 4 forces on the crate, so there are 4 work that occurs

work done by the applied force = Wp work done by the frictional force = Wf

the magnitude is the same as the force applied by the applied force (Fp) but the opposite direction

work done by the normal force = Wn

the direction is upward with F = mg

work done by the gravitational force = Wg

Because what is sought is only work by the force of gravity, then

we can find it from the formula of potential energy

W = ΔPE = - m. g. (h2-h1)

W = - mgh2 (h1 = 0)

Negative value are caused by the movement of objects in the opposite direction to the downward force of gravity

W = - 700. 9.8. 3 sin 30 (h2 has an angle of 30°)

W = -10290 J

Learn more  

law of motion  

brainly.com/question/75210  

displacement of A skateboarder  

brainly.com/question/1581159  

The distance of the elevator  

brainly.com/question/8729508  


Related Questions

The yellow wire connected to a power supply carries 12v. if the power supply provides 60w of power to the yellow wire, how much current is passing through the yellow wire?

Answers

In physics, the rate of power in Watts could be determined by multiplying the voltage in volts, by the current in Amperes. In equation, that would be

P = IV

Substituting the values into the equation,

60 W = I*12V
I = 60/12
I = 5 Amperes

Therefore, a current of 5 Amperes is passing through the yellow wire.

The circuit to the right is constructed using 9 identical batteries and 9 identical resistors. the lower left corner of the circuit is grounded. determine whether the current through each resistor is zero or non-zero.

Answers

Final answer:

Without seeing the specific circuit diagram, it is not possible to accurately determine whether the current through each resistor is zero or non-zero. The answer requires applying circuit analysis techniques such as Ohm's Law and the Loop Rule to the provided configuration of batteries and resistors.

Explanation:

To determine whether the current through each resistor is zero or non-zero in a circuit with 9 identical batteries and 9 identical resistors, one would need to apply principles from circuit analysis, such as Ohm's Law and the Loop Rule. However, without the provided circuit diagram, it cannot be deduced whether the current is zero or non-zero. In a typical circuit arrangement, if the circuit is properly connected with a path for the current to flow and if the batteries and resistors are arranged appropriately without any shorts, there would be a non-zero current through the resistors. The determination of this would require analyzing the specific configuration of the batteries and resistors, such as whether they are arranged in series or parallel, and applying the loop rule which states that the sum of the voltage drops in a closed loop must equal the sum of the emf sources within that loop.

When are you safe outside if you hear thunder?

Answers

When there is thunder, then there would be lightning. The thunder and lightning are just reactions in the atmosphere involving electrons in the water molecules. Its product is the lightning and thunder, but lightning comes first because light is faster than sound. So, when you are outside, you can't really outrun a lightning because it is the fastest matter. However, you can avoid being hit if you don't stay near to isolated trees, electrical posts and metals. Remember that lightning is just a stream of electrons so they could easily conduct with metals. Remove any metals from your body and stay low. 

Resistance is a measure of how well a material conducts an electric charge. Would you expect to find a high or low, level of resistance in a copper wire and why

Answers

Resistance is a measure of how a material conducts an electric charge. It is a quantity that measures how well a material would reduce the current that flow through it. So, for a copper wire, you would expect it to have a low resistance since it conducts electric charge very well. It is known to be a good conductor. It has a high electrical conductivity and low resistance.

After observing the electric field in your trials above, where was the electric field the strongest? what was the direction of the electric field?

Answers

Answer: Answer is The direction of the electric field is always directed in the direction that a positive test charge would be pushed or pulled if placed in the space surrounding the source charge.

Electric field strength is highest close to central charges with closely spaced field lines, indicating intensity and weaker electric fields occur farther away.

Electric field strength: The electric field is strongest close to the central charges, where the field lines are closely spaced together. This is where the electric field is most intense. Field lines that are farther away from the central charges indicate weaker electric fields.

A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. suppose that a storm is in progress with a severe storm class rating. let us say that we want to set up a statistical test to see if the wave action (i.e., height) is dying down or getting worse. if you wanted to test the hypothesis that the waves are dying down, what would you use for the alternate hypothesis?

Answers

Before we answer this question, let us first understand what alternate hypothesis is.

The alternative hypothesis is the hypothesis which is used in the hypothesis testing and this is opposite to the null hypothesis. This is the test hypothesis which is usually taken to be that the observations are the result of a real effect in an experiment.

In this case since what we want to set up is the statistical test to see if the waves are dying down, then this means we are trying to determine if the wave height are decreasing, so lesser than 16.4 feet. Therefore:

The alternative hypothesis would state                 (ANSWER)

Ha: μ less than 16.4 feet and P-value area is on the left of the mean.

 

While the null hypothesis is the opposite and would state

H0: mu equals 16.4 feet 

How the season affects the price quality and availability of vegetables?

Answers

Each vegetables and fruits will have different response to the varying temperature and atmospheric condition of the surrounding. Some may become rotten in a shorter period of time. In this regard the price would get lower in order for the goods to get sold easily. 

Answer:

The season affects the price because if they aren’t grown in their natural growing season, they won’t taste as good as the other veggies would. So if they aren’t in season, and you try to buy them they will be more expensive because its harder to grow as many. So there won’t be that many, the ones that you do have will be expensive, and it’s not even going to be that good.

Explanation:

A sand core used to form the internal surfaces of a steel casting experiences a buoyancy force of 225 n. the volume of the mold cavity forming the outside surfaces of the casting = 4840 cm3. what is the weight (in kg) of the final casting? ignore considerations of shrinkage

Answers

Newton’s second law gives us the relationship of force F, mass m and acceleration a. The formula is given as:

F = m a                  --> 1

However we also know that the relationship of mass m, density ρ, and volume V is:

m = V ρ                 --> 2

Therefore substituting equation 2 to equation 1:

F = ρ V a = ρ V g

where a is acceleration due to gravity, ρ is density of water and V is the volume of the casting, therefore:

F = (1x10^-3 kg/cm^3) (4840 cm^3) (9.8 m/s^2)

F = 47.432 kg m/s^2

F = 47.432 N

 

Going back to equation 1:

47.432 N = m (9.8 m/s^2)

m = 4.84 kg

 

Hence the weight of the final casting is 4.84 kg

Final answer:

To find the weight of the final casting, we use the principles of buoyancy to solve. Given the volume and the approximate density of steel, we multiply them to find the mass. The weight of the final casting is therefore approximately 37.974 kg.

Explanation:

This problem's solution involves the application of Archimedes' Principle which states that an object submerged in fluid, experiences a buoyant force equal to the weight of the fluid displaced by the volume of that object.

In this circumstance, the sand core is completely submerged and the fluid (molten steel) that fills its cavity takes its form after solidifying. The given buoyancy force (225 N) is essentially the weight of the fluid displaced by it ( weight = mass x gravity). The weight of the mold cavity would hence be the weight of the steel casting.

Given the volume of the mold cavity (4840 cm

3

), we can determine the mass of the steel using the volume and the density of the steel (assuming the density of steel to be around 7.85 g/cm

3

).

The mass (m) would hence be: m = volume x density = 7.85 g/cm3 x 4840 cm3 = 37974 g = 37.974 kg.

Therefore, the weight of the final steel casting is approximately 37.974 kg.

Learn more about Archimedes' Principle here:

https://brainly.com/question/787619

#SPJ3

Although the class has no water, the students want to know if the cube will float or sink in water. Explain, in detail, the steps that must be taken to determine if the cube will float or sink. Be sure to use the following key terms: triple beam balance, metric ruler ,and density.

Answers

Okay, so the density of water is 1g/cm3. In order for the cube to float, it has to be less than 1, and it will sink if it is more than 1 g/cm3. Use a triple beam balance to weigh the cube, looking at the metric ruler on the balance. Then, if the cube's density is more than 1, then you know it will float. If the density is less than 1, you know it will sink.
hope this helps, and I didn't know how to use the word "metric ruler"

Cube C1 has sides of length L, has an area A, and a volume V. Cube C2 has side that is 1/4 L. What is the area and the volume of cube C2?

Answers

Answer :
C2 area= 3/8 [tex] L^{2} [/tex]
C2 volume= [tex] 1/64L^{3} [/tex]

To answer this question you must calculate the cube C2 area and volume using "L" as unit. The calculation formula should be same as a normal cube.

C2 area= 6x [tex] (1/4L)^{2} [/tex]
C2 area= 6x[tex] 1/16(L^{2} [/tex]
C2 area= 3/8 [tex] L^{2} [/tex]

C2 volume= [tex] (1/4L)^{3} [/tex]
C2 volume= [tex] 1/64L^{3} [/tex]

Find the number of certifications held by people grouped by planet. this should have two columns the first, "name" will be the names of planets that have at least one certification. the second column should be "certcount" an

Answers

The tables are the following:

 

CREATE TABLE `bsg_cert` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `title` varchar(255) NOT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB

 

CREATE TABLE `bsg_cert_people` (

  `cid` int(11) NOT NULL DEFAULT '0',

  `pid` int(11) NOT NULL DEFAULT '0',

  PRIMARY KEY (`cid`,`pid`),

  KEY `pid` (`pid`),

  CONSTRAINT `bsg_cert_people_ibfk_1` FOREIGN KEY (`cid`) REFERENCES `bsg_cert` (`id`),

  CONSTRAINT `bsg_cert_people_ibfk_2` FOREIGN KEY (`pid`) REFERENCES `bsg_people` (`id`)

) ENGINE=InnoDB

 

CREATE TABLE `bsg_people` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `fname` varchar(255) NOT NULL,

  `lname` varchar(255) DEFAULT NULL,

  `homeworld` int(11) DEFAULT NULL,

  `age` int(11) DEFAULT NULL,

  PRIMARY KEY (`id`),

  KEY `homeworld` (`homeworld`),

  CONSTRAINT `bsg_people_ibfk_1` FOREIGN KEY (`homeworld`) REFERENCES `bsg_planets` (`id`) ON DELETE SET NULL ON UPDATE CASCADE

) ENGINE=InnoDB

 

CREATE TABLE `bsg_planets` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `name` varchar(255) NOT NULL,

  `population` bigint(20) DEFAULT NULL,

  `language` varchar(255) DEFAULT NULL,

  `capital` varchar(255) DEFAULT NULL,

  PRIMARY KEY (`id`),

  UNIQUE KEY `name` (`name`)

) ENGINE=InnoDB

 

 

Joining them all up doing a count with a group by should do the trick:

SELECT  planet.name ,

    COUNT(*) AS cert_count

FROM    bsg_cert_people people_cert

    JOIN bsg_people people ON people.id = people_cert.pid

    JOIN bsg_planet planet ON people.homeworld = planet.id

GROUP BY planet.name

 

Or we can also use this syntax to get the same result:

SELECT pl.name, count(cert) AS "CertCount"

FROM bsg_planets pl

JOIN bsg_people pe ON pl.id = pe.homeworld

JOIN bsg_cert_people cp ON cp.pid = pe.id

GROUP BY pl.id

Which expression is equivalent to 3m+1-m

Answers

2m+1

You would simplify the expression by subtracting the 3m by the m.

Answer:

Th equivalent of [tex]3m+1-m[/tex] is [tex]2m+1[/tex]

Explanation:

We need to write the equivalent expression of [tex]3m+1-m[/tex]

first, combine the like terms,

[tex]3m-m+1[/tex]

take out the common variable,

[tex](3-1)m+1[/tex]

[tex]2m+1[/tex]

Therefore, the equivalent of [tex]3m+1-m[/tex] is [tex]2m+1[/tex]

A howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 4.6 km. assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 w/m2. what is the acoustic power emitted by the howler?

Answers

The acoustic power of a specific sound is determine by multiplying the square of the distance and the threshold of hearing. We have to convert the distance first from kilometers to meters.

              distance = (4.6 km) x (1000 meters/ 1 km) = 4600 meters

Performing the required operation,

               Acoustic power = (1.0 x 10^-12 W/m²)(4600 m)²
                Acoustic power = 2.116 x 10^-5 W

Thus, the acoustic power is approximately 2.12 x 10^-5 W. 

Why is it that the two possible faults wit inductors are short circuit and open circuit

Answers

Short circuit and an open circuit are the two most common type of faults in inductors and also in resistors, generators and transformers. An open circuit type of  fault would refer to the flow of current that is disrupted somehow in a certain circuit and the circuit would stop its operation. On the other hand, short circuit type of fault is when the current flowing in the system would be much higher than the normal. This short circuit current or the fault current would run back to the location of the fault. If an inductor would experience short circuit, then the fault current would only run through it since it would be able to provide a very low impedence path.

Convert 21.0 cm to inches

Answers

8.2677165354 is the answer

Water in the oceans may become fresh water available to humans through the processes of

Answers

Water in the oceans may become fresh water available to humans through the processes of evaporation, condensation and precipitation.

In these processes, water is heated to a very high temperature until it evaporates in order to kill the germs and remove the salts which remains after water evaporation. The next step in condensing the water vapor (which is now fresh) and precipitating this vapor to be used by humans.

Ocean water can be made into fresh water via desalination, a process which removes salt and minerals. This technology is essential in areas with scarce water supplies but is energy-intensive and contributes to environmental issues with its saline byproduct.

Water in the oceans can become fresh water available to humans primarily through the process of desalination. Desalination is a method that increases the amount of fresh water on Earth by removing dissolved salt and minerals from seawater or saline groundwater. Despite the virtually unlimited supply of saltwater, desalination techniques such as boiling, filtration, electrodialysis, and reverse osmosis are energy-intensive and costly. They also produce highly saline wastewater, which poses significant environmental challenges and must be managed appropriately. Desalination is a vital technology, especially in regions like the Middle East where water is scarce but energy resources are abundant.

When considering the water (hydrologic) cycle, it's important to note that while the Earth has an abundance of water, less than 1 percent of it is accessible fresh water. Through the water cycle, processes such as evaporation and condensation contribute to the natural distribution of water, but they do not desalinate it. For desalination to occur and produce fresh water for human use, technological intervention is required. The importance of these technologies cannot be overstated, as the availability of freshwater is critical to the survival of many living organisms, including humans.

True or false The theory of plate tectonics is the study of how Earth's surface has remained the same for billions of years

Answers

false, it is not the theory

how to divide electrons into energy levels?

Answers

In Bohr's atomic model, he proposed that the electrons are revolving around the nucleus in their respective orbitals. There are 5 kinds of orbitals: the s, p, d and f orbitals. They differ in their energy level, shape and number of subshells. Each subshell holds two oppositely spinning electrons. The s has 1 subshell, p has 3, d has 5 and f has 7. You arrange the orbitals into energy levels just like how you write them in an electronic configuration.

In the first energy level, you only have one 1s orbital. In the second energy level, you have one 2s and one 2p orbital, the 2p having more energy than 2s. The other levels are shown in the picture.

In general, the rate of evaporation increases with ___________. in general, the rate of evaporation increases with ___________. decreasing intermolecular forces decreasing volatility decreasing temperature decreasing surface area

Answers

In general, the rate of evaporation of liquid increases with increase in temperature and increases with increase in surface area of the liquid exposed to air. The rate of evaporation decreases with increasing of the intermolecular forces. The bigger intermolecular forces , the harder the molecules can escape from the liquid and become gas.

In an isochoric process, the internal (thermal) energy of a gas decreases by 50 j. how much work is done by the gas during this process

Answers

the amount of work done by the gas during this process is: 0
The isochoric process is a thermodynamic process in which the volume will always remain contant.

work could be calculated = P x dV

since dV = 0, there wore the amount of work done by this process is also 0
Final answer:

In an isochoric process where the gas's internal energy decreases by 50 J, no work is done by the gas because the volume is constant. The work done is 0 J.

Explanation:

In an isochoric process (also known as an isovolumetric process), the volume of a gas remains constant. According to the first law of thermodynamics, the change in internal energy (ΔU) of a system is equal to the heat added to the system (Q) minus the work done by the system (W): ΔU = Q - W. In an isochoric process, because the volume does not change, no work is done by the gas (W = 0). Therefore, if the internal energy of the gas decreases by 50 Joules, and no work is done, the amount of heat removed from the gas would be equivalent to the decrease in internal energy, which is -50 Joules.

The answer to the student's question is that in an isochoric process where the internal energy decreases by 50 Joules, no work is done by the gas since the volume is constant; the work done is 0 Joules.

Every time you are convicted of a moving violation it will appear on your driving record.

Answers

True because whenever you get pulled over and get a ticket, it goes on your record.

WILL GIVE BRAINLIEST
Consider a girl that has a mass of 55.0 kg and is standing on the floor, how much supporting force does the floor have?

at least 55 kg up
at least 55 kg down
at least 539 N up
at least 539 N down

Answers

the answer is at least 539 N up
Mass of girl =55kg
acceleration due to gravity =9.8m/s^2

So, the force she is applying on the floor must equal
55× 9.8 N
(Because force =mass ×acceleration)
=539N

Now, according to newton's third law the floor must be applying the same force on the body in the opposite direction.
So the force applied here by the floor is 539N upward.


Option "C" is the correct one.

A red blood cell is placed in a hypertonic solution. this means the concentration of solutes in the solution is ________ than the concentration of solutes in the intracellular fluid, and will cause the cell to ________.

Answers

Higher, shrink. Hope this helps.
Final answer:

A hypertonic solution has a higher concentration of solutes than the inside of a red blood cell. This causes water to move out of the cell, causing the cell to shrink or crenate.

Explanation:

When a red blood cell is placed in a hypertonic solution, the concentration of solutes in the solution is higher than that in the intracellular fluid. As a result of this difference in solute concentration, water will move out of the cell and into the solution in a process called osmosis. This will cause the cell to shrink or create due to water loss.

Learn more about hypertonic solution

https://brainly.com/question/4237735

#SPJ3

Is it true or false that air pollution only occurs as a result of human activity

Answers

Answer:

This is false

Explanation:

The given statement "Air pollution only occurs as a result of human activity" is false because air pollution can occur as a result of both human activity and natural processes.

Human activities that contribute to air pollution include:

Burning fossil fuels: Burning fossil fuels, such as coal, oil, and natural gas, releases pollutants into the air. These pollutants include carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter.Transportation: Transportation is another major source of air pollution. Cars, trucks, buses, and airplanes emit pollutants into the air, including carbon monoxide, hydrocarbons, and nitrogen oxides.Industry: Industrial activities, such as power plants, factories, and refineries, also emit pollutants into the air. These pollutants include sulfur dioxide, nitrogen oxides, and particulate matter.

Natural processes that can contribute to air pollution include:

Volcanic eruptions: Volcanic eruptions can release large amounts of pollutants into the air, including sulfur dioxide, carbon dioxide, and particulate matter.Wildfires: Wildfires can also release large amounts of pollutants into the air, including carbon dioxide, particulate matter, and ozone.Dust storms: Dust storms can stir up dust and other particles into the air, which can contribute to air pollution.

To know more about the Air pollution, here

https://brainly.com/question/1203796

#SPJ6

Other Questions
The cold protective response may be activated when a person's face is submerged in water that is less than ________ degrees fahrenheit. An item is regularly priced at $69. Ashley bought it on sale for 35% off the regular price. As it pertains to the diffusion of innovation, if the __________ group is relatively small, the number of people who ultimately adopt the innovation likely will also be small. Sally found that a solution of x = 2 was extraneous for her function. What would be a possible denominator in Sally's function? 4x + 8 2x + 12 x^2 4 x^2 16 Achondroplasia ____.a. affects only homozygotesb. is inherited as an x-linked disorderc. is inherited as an autosomal recessive conditiond. is characterized by abnormally short arms and legse. affects about one in one million people What type of clause or phrase is italicized in the sentence? The two waiters exchanged a look WHOSE MEANING WAS CLEAR TO ME. AppositiveAdverb clauseInfinitiveAdjective clausePresent participle phrase George plans to cover his circular pool for the upcoming winter season. The pool has a diameter of 20 feet and extends 12 inches beyond the edge of the pool. A rope runs along the edge of the cover to secure it in place.a. What is the area of the pool cover?b. What is the length of the rope? (06.02 LC)What is most likely the line of best fit for this scatter plot? Line A Line B Line C Line D A musical style that features vocal harmonies and the singing of nonsense syllables is called: A client has edema in the lower extremities during the day, which disappears at night. with which medical problem does the nurse conclude this clinical finding is consistent? Is it true or false that air pollution only occurs as a result of human activity Mia is standing 210 yd from a radio tower. The angle of elevation from where she is standing on the ground to the top of the tower is 11. How tall is the radio tower? How to access your federal reserve account? Which of the rock samples below is most likely to be a metamorphic rock?The answer is Sample D Factor this expression completely and then place the factors in the proper location on the grid. Note: Place factors alphabetically in the grid! ab + 4 + a + 4b In two or three sentences, explain how a monopolist chooses a price What is the rational number equivalent to 1 point 28 with a bar over 28? 1 and 6 over 97 1 and 28 over 99 1 and 8 over 33 1 and 5 over 16 Which geographical feature borders southern texas on the eastern side? It would be expected that methanol (ch3oh) would be more soluble in water than methane (ch4) would be. a. True b. False (05.04 MC) A 2012 report from the U.S. Surgeon General stated: "Another common practice is strategically locating tobacco-related marketing materials where young children will be exposed to them. Tobacco industry executives acknowledge that products and advertising should be placed at eye level (Pollay 2007), but in California, 48% of stores had at least one cigarette marketing item at or below 3 feet from the floor (Feighery et al. 2001)." It was also noted that 25% of cigarette displays were next to candy. In addition, a national study found that about one-third of the stores had tobacco ads at low heights. After California banned counter displays, some stores place cigarettes in a see-through display so product brands could still be seen.What is the main reason that states like California ban counter displays of tobacco products? Steam Workshop Downloader