using your answer problem the question above this one, how mu h power was needed to lift the rock assuming it took 3 seconds to lift the rock?

1000 Watts of **power **was needed to lift the rock.

To calculate the work done on the rock, we use the formula:

Work = Force x Distance

In this case, the force applied to lift the rock is 100 N, and the distance lifted is 30 **meters**. Therefore, the work done on the rock is:

Work = 100 N x 30 m = 3000 Joules

So, 3000 Joules of work was done on the rock.

To calculate the power needed to lift the **rock**, we use the formula:

Power = Work / Time

The work done on the rock is 3000 **Joules**, and the time taken to lift the rock is 3 seconds. Therefore, the power needed to lift the rock is:

Power = 3000 Joules / 3 seconds = 1000 Watts

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What type of energy transformation happens during photosynthesis?

(select the BEST answer choice

thermal --> radiant

chemical --> radiant

chemical --> thermal

radiant --> chemical

**Answer:**

radiant - chemical is the best answer

Which two ways the nervous and endocrine systems interact?

**Answer:**

Along with the nervous system, the endocrine system coordinates the body's functions to maintain homeostasis during rest and exercise. The nervous and endocrine systems also work together to initiate and control movement, and all the physiological processes movement involves.

**Explanation:**

Since the speed of light, “c”, is 0.3% slower in air than it is in outer space, how does that affect the observed wavelengths?

**Answer:**

**....interesting**

How many grams of carbon is needed to react with hydrogen gas to produce 59.8 grams of acetylene (C2H2)?

**Answer:**

[tex]55.1657[/tex] grams/mol of carbon is needed to react with hydrogen gas to produce 59.8 grams of acetylene (C2H2)

**Explanation:**

The molecular weight of acetylene is 26.04 g/mol

Molecular weight of carbon is equal to 12.011 g/mol

Two carbon atom produces one acetylene molecule.

Thus, 2 * 12.011 g/mol of carbon is used to produce 26.04 g/mol of acetylene,

Amount of carbon required to produce 59.8 grams of acetylene

[tex]\frac{2*12.011}{26.04} * 59.8 \\= 55.1657[/tex]grams/mol

[tex]55.1657[/tex] grams/mol of carbon is needed to react with hydrogen gas to produce 59.8 grams of acetylene (C2H2)

How does ￼fertilizer affect nitrogen cycle

Cuando se usa demasiado fertilizante para las plantas una parte de ese nitrógeno no vuelve a la atmósfera y a cambio contamina el medio ambiente

**Explanation:**

the nitrogen cycle is a natural process that adds nitrogen to the soil. however the use of fertilizer has increased the amount of usable nitrogen in the soil

mass-mass problem:

If 25.0 grams of carbon dioxide are used in photosynthesis how many grams of glucose (C6H12O6) could be Produced according

to the following equation : 6CO2 + 6H2O → C6H12O6 + 602

**Answer:**

17.05 g of glucose

**Explanation:**

The equation of the reaction is given as;

6CO2 + 6H2O → C6H12O6 + 602

From the equation;

6 mol of CO2 produces 1 mol of C6H12O6

Converting to masses;

CO2:

Mass =Number of moles * Molar mass

Mass = 6 mol * 44 g/mol = 264 g

C6H12O6:

Mass = Number of moles * Molar mass

Mass = 1 mol * 180 g/mol = 180 g

This means 264g of CO2 produces 180g of C6H12O6

25g of CO2 would produce x g of C6H12O6

264 = 180

25 = x

x = 25 * 180 / 264

x = 17.05 g

i really need help with this

**Answer:**

the process shown here is endocytosis.

**Explanation:**

endocytosis is a process of taking something inside the cell..

5.

Given: C2H5C1

P1: 951.72 kPa

P2: 362.29 kPa

T1: 653.34 K

Wanted: kelvins?

**Answer: The final temperature is 248.7 K**

**Explanation:**

To calculate the final temperature of the system, we use the equation given by **Gay lussac Law**. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant volume.

Mathematically,

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

where,

[tex]P_1\text{ and }T_1[/tex] are the initial pressure and temperature of the gas.

[tex]P_2\text{ and }T_2[/tex] are the final pressure and temperature of the gas.

We are given:

[tex]P_1=951.72kPa\\T_1=653.34K\\P_2=362.29kPa\\T_2=?[/tex]

Putting values in above equation, we get:

[tex]\frac{951.72}{653.34}=\frac{362.29}{T_2}\\\\T_2=248.7K[/tex]

**Thus the final temperature is 248.7 K**

This is for Earth/Space Science. Please help me and thank you in advance. I need this quickly please and thank you.

Which statement describes the solar feature shooting off into space labeled C?

1. A brief eruption of intense high-energy radiation from the sun's surface

2. A dark spot appearing from time to time on the sun's surface

3. A stream of glowing gas that shoots out from the sun in an arch

4. An envelope of plasma surrounding the sun

I think the answer should be number 3

I need help with this question ASAP

**Answer:**

True

**Explanation:**

Asexual reproduction does not involve sex cells or fertilization . Only one parent is required, unlike sexual reproduction which needs two parents. As a result, the offspring are genetically identical to the parent and to each other.

What is a song that gets you in a mood? ;)

Happy by Pharrell Williams

**Answer:**

Uhm- s-- money- feelings- die? But, slowed -w-

**Explanation:**

Explain why a halogen bulb has a longer bulb life than a traditional incandescent bulb filled with argon.

**Answer:**

The halogen bulb lasts longer because the filament lasts longer. It can have twice the life of an incandescent and use the same amount or slightly less (10%) electricity.

**Explanation:**

Single strand RNA is made using the genetic instructions from double strand DNA.

Proteins are made from the instructions in RNA.

True

False

False I’m pretty sure

The diagram shows movement of thermal energy

In which areas of the diagram does conduction occur?

W and X

X and Z

Y and Z

Z and W

**Answer:**

Y AND Z

HOPE IT HELPS THANK ME LATER.

**Answer:**

B. Y and Z

**Explanation:**

what is the equation for hydrogen peroxide

**Answer:**

H2O2

**Explanation:**

2 hydrogen, 2 oxygen wikipedia it

**Answer:**

hey!

Your answer is that the equation for Hydrogen Peroxide is [tex]H_{2}[/tex][tex]O_{2}[/tex]

**Explanation:**

Its formed when [tex]H_{2}[/tex]O and [tex]O_{2}[/tex] react chemically together!

HOPE THIS HELPED!

Every ________ will have its own unique set of quantum numbers.

Select the correct answer below:

A. atom

B. shell of electrons

C.proton

D. individual electron

**Answer:**

D. individual electron

**Explanation:**

Every individual **electron** will have its own unique set of **quantum numbers.**

What are quantum numbers?

**Quantum numbers **are the numbers which describe the values of conserved quantities with respect to the dynamics of a quantum system.They correspond to the **Eigen values **of operators which commute with the Hamiltonian quantities.

The** Hamiltonian quantities** can be known with precision simultaneously with the system's energy.Quantum numbers can take values of discrete sets of** integers** or even half-integers even though they can approach infinity in some cases.

They can specifically describe energy levels of electrons, and can also explain **angular momentum,**spin,etc.These are used to describe the path of an electron in an atom ,when the quantum numbers of all atoms are combined they must comply with the Schrodinger equation.

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how does a allergy develop?

PLEASE HELP!

Allergies arise when a foreign material such as pollen, bee venom or pet dander responds to your immune system or a food that in most people does not cause a reaction. Substances known as antibodies are formed by your immune system.

**Answer: im not fully sure but from what i rememeber Allergies develop when your immune system mistakenly identifies a thing such as pollen, mold or food as harmful then your body reacts to it **

**Explanation:**

Dona is attempting to make an electromagnetic to pick up old nails in her driveway. Which of these materials would be best to us for the core to make the strongest electromagnetic to pick up the most nails?

**Answer:**

**The materials would be best to us for the core to make the strongest electromagnetic to pick up the most nails is described below in detail.**

**Explanation:**

Use a couple of wire strip-pers to exclude some centimeters of insulation from every end of the cable. Skillfully cover the cable around the nail. The more cable you enclose around the nail, the more effective your electromagnet will be. Compose certain that you leave sufficient of the cable unwrapped so that you can connect the battery.

How do parasites affect their hosts?

They help their hosts by consuming or using their cells.

They help their hosts by growing in size.

O They harm their hosts by growing in size.

They harm their hosts by using their hosts as a food source.

The last one seems right to me

Convert 6.03 m to km using Dimensional Analysis

**Explanation:**

[tex]6.03 \: m \times \frac{1 \: km}{1000 \: m} = 0.00603 \: km[/tex]

Please help with chem ASAP

**Answer:**

Imagine Dragon

**Explanation:**

These balls across yo face

Gottem

1) Write the symbol and charge for each individual ion

2) Balance the charge so that they equal to zero

3)Write the formula based on how many of each ion you used in step 2

11) Beryllium and Phosphorus

12) cesium and Sulfur

13) Lithium and phosphorus

14) fluorine and rubidium

15) Francium and oxygen

**Answer:**

I'm pretty sure these are correct

11) Be 2+ and P 3- Formula is Be3P2

12) Cs 1+ and S 2- Formula: Cs2S

13) Li 1+ and P 3- Formula: Li3P

14) Rb 1+ and F 1- Formula: RbF

15) Fr 1+ and O 2- Formula: Fr2O

**Explanation:**

You do the criss-cross method where the charge on one ion becomes the amount on the second

A gas in a piston starts out with a volume of 156 mL, a temperature of 28.1° C, and a pressure of 1.12 atm. If it ends with a volume of 312 mL and a temperature of 87.2° C, what is the new pressure?

**Answer:**

0.67atm is the new pressure of the gas

**Explanation:**

To find one condition of a gas when pressure, volume and absolute temperature change we must use *combined gas law:*

[tex]\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}[/tex]

*Where P is pressure, V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.*

Replacing:

P₁ = 1.12atm

V₁ = 156mL

T₁ = 28.1°C + 273.15K = 301.25K

P₂ = ?

V₂ = 312mL

T₂ = 87.2°C + 273.15 = 360.35K

1.12atm*156mL / 301.25K = P₂*312mL / 360.35K

P₂ = **0.67atm is the new pressure of the gas**

You start with 2.5g of magnesium and add it to 400mL of CO2 at 23 o C and 1atm. How many grams of magnesium oxide will be formed?

**Answer:**

0.664 g are formed by the reaction.

**Explanation:**

First of all, we determine the reaction:

Mg + CO₂ → MgO + CO

We need to determine the moles of the CO₂ by the Ideal Gases Law.

We convert to L, the volume → 400 mL = 0.4L

T° → 23°C + 273 = 296K

P . V = n . R .T

n = P . V / R .T

n = (1 atm . 0.4L) / (0.082 . 296K) → 0.0165 moles

Moles of Mg → 2.5 g . 1mol / 24.3g = 0.103 moles

As ratio is 1:1, CO₂ is the limiting reactant.

For 1 mol of Mg, we need 1 mol of gas

Then, for 0.103 moles of Mg, we need 0.103 moles of gas, but we only have 0.0165 moles.

If we see the product side, ratio is also 1:1

0.0165 moles of CO₂ must produce 0.0165 moles of MgO.

We convert the moles to mass → 0.0165 mol . 40.3 g /1mol = 0.664 g

A sample of Oxygen gas is in a cylinder at constant temperature. What would happen to the pressure of the gas if the volume was

smooshed down to half its original size? Decreasing the volume by a factor of 2.

**Answer:**

This means that the pressure would become double of it's initial pressure.

**Explanation:**

Key statements:

- Constant temperature

- What happens to the pressure of the gas if the volume was

smooshed down to half its original size?

Basically the question is asking about the relationship between pressure and volume at constant temperature. This is given by Boyle's law.

Boyle's law states that the volume of a fixed mass of gas is inversely proportional to it's volume at a fixed temperature.

This is given by;

P1V1 = P2V2

Where;

P1 = Initial pressure

P2 = Final pressure

V1 = Initial Volume

V2 = Final Volume

From the question;

V2 = V1/2

Inserting it into the equation;

P1 V1 = P2 V1/2

Divide all through by V1

P1 = P2 /2

P2 = 2 P1

This means that the pressure would become double of it's initial pressure.

Please help: A complete moon cycle is how many weeks

**Answer:**

29.5 days

**Explanation:**

its 29.5 days i hope it helps

**Answer:**

The Moon takes 27.3 days to orbit Earth, but the lunar phase cycle (from new Moon to new Moon) is 29.5 day

After the shuttle disaster, an unknown compound residue was removed from a piece of the debris. Upon analysis, it was found to contain 2.61 g of carbon, 6.09 g of nitrogen, and 1.31 g of hydrogen. What is its empirical formula?

**Answer:**

The final empirical formula is [tex]C_2 N_5 H[/tex]

**Explanation:**

Given

The amount of carbon, nitrogen and hydrogen in a given compound is as follows

C:N:H

[tex]2.61 : 6.09 : 1.31[/tex]

On simplifying the ration values we get

[tex]\frac{2.61}{1.31} : \frac{6.09}{1.31} : \frac{1.31}{1.31}[/tex]

So the final ratio is

[tex]2 : 5 : 1[/tex]

The final empirical formula is [tex]C_2 N_5 H[/tex]

1. Which of the following is the most important function of the microscope?

A. measuring specimen

B. magnification of the specimen

C. photographing the specimen

D. locating and viewing the specimen

image or

I think B magnification of the specimen

45 grams of ammonia, NH3, in 0.75 L of solution.

2.3 moles of sodium chloride in 0.45 liters of solution . necessarile correct ... 0.025 L. (1.3 SF). 45 grams of ammonia in 0.75 L of solution. 45g x 1 mol = 2. demol ... anol x 1,50 = 3 mol NaOH x 40,019 = 120g Naolt.

A student investigated temperature changes during a reaction. Figure 2 shows the apparatus the student usesWhat is the biggest error in this investigation.Suggest two improvements to the apparatus which would increase the accuracy of the experiment.

[3 marks]

**Answer:**

it is becuse the students used wrong apparatus

The biggest error in this **investigation** is the use of inappropriate types of **equipment**.

The types of **equipment** used in the given setup are inappropriate. Suggested improvements in the apparatus to increase the accuracy are given below:

1. The use of a **polystyrene cup** in the laboratory for any reaction is inappropriate. As a slight increase in **temperature** causes the decomposition of the chemicals in the cup as well.

2. The use of a **thermometer** stand is a must. Without using the stand, the tip of the thermometer touches the lid of the container, which causes **inaccuracies** in the result.

Hence, all the **suggestions** are listed above.

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the rules and regulations that collectively manage the development and use of land are known as zoning laws. T/F
HELP HELP HELP HELPwhats the pressure in a 490.0 mL water bottle that is at 45 C if the pressure was 772 mm Hg at19 C assuming the volume doesn't change?
If a known amount of the weak acid was stoichiometrically titrated with a solution of NaOH at a known concentration, it would be possible to isolate the sample as a pure sodium salt. What physical process would allow you to isolate this salt after the acid-base titration occurs in solution?Spell out the full name of the physical process.
Can someone help me please
true/false. the larger the number of incompatible software packages an organization owns, the greater the cost to train and retrain employees.
Meilla is the vice president of marketing at a medical supply company. In a typical work week, she is required to attend three departmental meetings, prepare progress reports, sit in on job interviews for other departments, have one-on-one meetings with each of her five managers, and travel to a satellite location where mock-ups of new products are photographed for catalogs. Most weeks, Meilla puts in more than 70 hours at the office, and she often responds to e-mails while watching movies at home on the weekends. Despite this, she finds herself falling behind. Meilla's experience is an example ofA) a lack of information about what needs to be done to accomplish her tasks.B) competing expectations from different departments about her job duties.C) the number of role demands placed on her being too high.D) the requirements of the job exceeding her capabilities.E) having too many nonwork obligations.
Quan ordered a $4. 50 bowl of soup. The tax rate was 72% (whichequals 0. 075). He paid for the soup with a $20 bill. a. What was the tax on the bowl of soup?b. What was the total price including tax?c. How much money should Quan get back from his payment?
Which of the following laws does not provide some sort of authorization for governmental wiretapping?a) Title III of the Omnibus Crime Control and Safe Streets Actb) Electronic Communications Privacy Actc) Federal Communications Actd) Communications Assistance for Law Enforcement Acte) USA PATRIOT Act
a specific provision that prevents states from passing laws that treat people differently on account of race or ethnicity is known as the
A town has a population of 20,000 and is growing at 4% each year. What will the population be after 6 years, to the nearest whole number?
consider the reaction that occurs when 7.5 ml of 1.2 m barium nitrite is mixed with 10.0 ml of 0.60 m sodium sulfate. a) How many grams of barium sulfate are produced if this reaction runs with a 100% yield? b) what ions remain in solution? c)what concentration of ions remain in the solution?
The domain and target of the following function is the set of Real numbers. f(x)=x Which is the most appropriate way to describe this function? a. f is one-to-one but not onto b. f is a bijection c. f is onto but not one-to-one d. f is not well defined.
A researcher studies water clarity at the same location in a lake on the same dates during the course of a year and repeats the measurements on the same dates 5 years later. The researcher immerses a weighted disk painted black and white and measures the depth (in inches) at which it is no longer visible. The collected data is given in the table below. Complete parts (a) through (c) below. Observation 1 2 3 4 5 6 Date 1/25 3/19 5/30 7/3 9/1311/7 Initial Depth, Xi 47.7 38.3 43.9 41.2 49.5 51.7 Depth Five Years Later, Yi 56.0 37.4 49.7 44.5 54.6 53.8 a) Why is it important to take the measurements on the same date? A. Those are the same dates that all biologists use to take water clarity samples. B. Using the same dates makes it easier to remember to take samples. C. Using the same dates makes the second sample dependent on the first and reduces variability in water clarity attributable to date. Your answer is correct.D. Using the same dates maximizes the difference in water clarity. b) Does the evidence suggest that the clarity of the lake is improving at the alpha equals 0.05 level of significance? Note that the normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Let diequalsXiminusYi. Identify the null and alternative hypotheses. Upper H 0: mu Subscript d equals 0.050 0 Upper H 1: mu Subscript d less than 0.050 0 (Type integers or decimals. Do not round.) Determine the test statistic for this hypothesis test. nothing (Round to two decimal places as needed.)
when the reaction, cl2(aq) cl-(aq) clo3-(aq) is balanced in aqueous basic solution, what is the coefficient of h2o?
A distracted driver may not see important traffic events such as:A. A pedestrian crossing the streetB. An interstate guide signC. An exit lane
item at position 3 how does foreshadowing affect the time and sequence of the novel?
A spinner is divided into five colored sections that are not of equal size: red, blue,green, yellow, and purple. The spinner is spun several times, and the results arerecorded below:Spinner ResultsColor FrequencyRedBlueGreenYellowPurple123202015Based on these results, express the probability that the next spin will land on red orblue or yellow as a percent to the nearest whole number.
Economic Order Quantity is a calculation method to optimize order quantities based on certain tradeoffs. What statement best describes the overall objective of EOQ?Q* = 2DSHA. to calculate the optimum safety stockB. to minimize the sum of carrying cost and holding costC. to maximize the customer service levelD. to minimize the sum of setup cost and holding costE. to calculate the reorder point, so that replenishments take place at the proper time
What is the area of the regular hexagon shown below?
Animals are currently used in _____ percent of psychological research.