Luis

This page lists questions and answers that were posted by visitors named Luis.

Questions

The following questions were asked by visitors named Luis.

You have two gas-filled balloons, one containing He and the other containing H2. The H2 balloon is twice the size of the He balloon. The pressure of gas in the H2 balloon is 1 atm, and that in the He balloon is 2 atm. The H2 balloon is outside in the snow...

A rental cas cost a minimun charge plus a fixed chrger per mile drive. One customer drove 280 miles and paid (0$. Write an equation relating the total cost, C (in dollars), to the miled driven, X.

Did you hear about ... It's a novel

Would someone please check my work. Thank you. Rewrite each sentence in an active voice 1) Mistakes were made. A)He made mistakes. 2) Musical legends such as Ray Charles, Billie Holiday, and Johnny Cash have all influenced Norah Jones A)Norah Jones was in...

if a spinning amusement-park ride has an angular speed of 1.2 rad/s, what is the centripetal acceleration of a person standing 12m from the center of the ride?

what is 44q to the power of -30?

An inverted cone has a diameter of 42 in and a height of 15in. If the water flowing out of the container is 35pi in^3/sec , how fast is the depth of the water dropping when the height is 5in?

A 6ft tall woman is walking away from a srteet lamp at 4 ft/sec that is 24ft tall. How fast is the length of her shadow changing?

The voltage,V, in an electrical unit is related to the current,I, and the resistance,R, by the equation V=IR. The current is decreasing at -4amps/sec as the resistance increases at 20ohms/sec. How fast is the voltage changing when the voltage is 100 volts...

The minute hand of a clock is 6in long. Starting from noon, how fast is the area of the sector swept by the minute hand increasing in in^2/min at any instant?

Express the following in Sigma notation 2+8+18+32+50+72

a thimble is 32.0 cm from a spherical concave mirror. The focal point lenght of the mirror is 11.0 cm. What is the image position?

would it be possible to view your body from head-to-toe, while standing in front of a plane mirror that is only as tall as you? this is in the chapter mirror on my physics books

My son has a homework (Kindergarden) where he has numbers and next to it there are five square frames. The numbers are 3 and 4. The instructions are as follows: Place counters in the five frames to show the number. Draw counters. Trace the number. Please...

A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from the thrower, how long was it in the air? How high was the tallest spot in the ball's path?

2.-The longest one-word name of any place in America is Chargoggagoggmanchauggagoggchubunagungamaugg.This name for a lake near webster, Massachusetts, is 45 letters long. It is a Native American name that means "You fish on you side, I'll fish on mine, an...

d: 2 2 3 4 10 5 3 x y x x z z − −     +  

two binary stars moving in a perfect circle orbit The stars have the same mass, the distance between them is one billion km (1x10^9 km), and the time each takes for one orbit is 10.4 Earth years. Determine the mass of each star (m1=m2). (this problem DOES...

Two identical springs (neglect their masses) are used to “play catch” with a small block of mass 200 g (see the figure). Spring A is attached to the floor and compressed 10.0 cm with the mass on the end of it (loosely). Spring A is released from rest and...

A string is tied to a 4.4 kg block and a 120 g hanging bucket. students add 20 g washers one at a time to the bucket. the students are unaware that the coefficient of static friction for the block on the table is 0.42. What is the maximum force of static...

By looking at the chemical structures of acetaminophen, aspirin, caffeine, ibuprofen, and naproxin sodium, how are you able to determine the relative polarity of each? Does it have something to do with the symmetry of the structure? Please help!

solve equation exactly over interval (0, 2ð) sin(x)= 1-2sin^2(x)

Hello, I am asking for these to be reviewed. I do not want answers; I just want to know if these answers look good. If you would just tell me which ones are wrong and why? Thank you for any help. Eliminate unnecessary shifts in tense, mood, voice, or pers...

Can anyone help me with these. I need to eliminate unnecessary shifts in tense, mood, voice, or person. 1)The greed of the 1980’s gave way to the occupational insecurity of the 1990’s, which in turn gave way to reinforced family ties in the early 2000’s....

I need to double check my work please. Revise to create pronoun-antecedent agreement and eliminate the generic he and any awkward pronoun reference. 1) While shopping for a new computer for school, I noticed that a laptop costs much less then they use to....

Can anyone help me check my work please. I need to revise the paragraph to establish a clear antecedent for every pronoun that needs one. Original: In the summer of 2005, the NCAA banned the use of mascots that could be considered offensive to American In...

Would someone please check my work. I need to combine the following sentences into one by using a semicolon. 1)Abalone fishing in California is strictly regulated. A person is allowed to harvest only twenty-four of these large mollusks per year. A)Abalone...

I need to make sure I understand this. I need to rewrite each sentence twice, once as a periodic sentence and once as a cumulative sentence. To me, both look like cumulative sentences though, so I am a little confused. If someone could check my work I wil...

When 3.00 g potassium carbonate (K2CO3 ) was mixed with 20.0 mL of hydrochloric acid (HCl, 4.0M) in a calorimeter, the temperature raised 3.0 degrees Celsius. B. Calculate the enthalpy change (H) of the reaction for per mole patassium carbonate. Assume t...

Currently in school we're learning about proving identities and for extra credit I got this problem. cosB= -8/17 in quad II and I have to find sin 7B. I have gotten this far: sin7B= sin(3B+4B) sin3Bcos4B+sin4Bcos3B my problem I can't figure out how to fur...

2. We ultimately want to find the amount of solar energy that hits the observer on the planet. Energy is usually measured in Joules, but there are other appropriate units of energy as well; kilowatt-hours for example, are used to measure the amount of ele...

3. Now wait until the planet is at the summer solstice (to the far left). Here the sunlight arrives perpendicular to the surface. (Note that the fact that the sunlight can be perpendicular to the surface here and parallel to the surface at the winter sols...

Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a) How many hours of daylight are there on the summer solstice with the inclination at 45 degrees? To estimate the length of day, id...

5. Now, wait until the planet is at the winter solstice (12:00am). a) How many hours of daylight are there on the winter solstice with the inclination at 45 degrees? Use the same criteria for the length of day that you used for the previous question. b) U...

How can we describe some object in astronomy? How can we interpret data? Can we either prove or disprove a hypothesis? If not, what can we do? How have theories developed over time? Explain and provide some examples.

big bang theory define

While surface conditions differ greatly, name the three ways that Venus and Earth are indeed sister planets.

You must show your work for full credit.) Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin):

A battery has an internal resistance of 0.42. A number of identical light bulbs, each with a resistance of 31.500, are connected in parallel across the battery terminals. The terminal voltage of the battery is observed to be one-half the emf of the batter...

A beam of protons is moving toward a target in a particle accelerator. This im trying to study for my exam by doing problems, however im stuck with this one. any help is appreciated beam constitutes a current whose value is 0.39A. (a) How many protons str...

Arrange the different types of forces in order of increasing energy. Covalent, Hydrogen Bonding, Ion-Dipole, Dipole-Dipole, Induced Dipole-Dipole (induced and London dispersion), and Ionic Bonding

How do I find the exact value of sin (pi/24)?

If 9m+5=2m+26, what is the value of m?

How much farther did chris run on thursday than on wednesday? If he run 3 5/8 on thursday an 1 1/4 on wednesday

(cosx - sinx)^2 + (cosx + sinx)^2 = 2 Iam in this step: 2cos^2(x) + 2sin^2(x) = 2 How can I make the equation on the right equal 2

How does: sin^2(x) - cos^2(x) = 1 - 2cos^2(x)

Can someone please explain how to simplify this proiblem: cotx/sec^2 + cotx/csc^2

An airplane travels 330 m down the runway before taking off. Assuming that it has constant acceleration, if it starts from rest and becomes airborne in 9.00 s, how fast (in m/s) is it moving at takeoff? A 73.3 m/s B 36.7 m/s C 1490 m/s D 660 m/s

A car entering the freeway accelerates from 10.2 m/s with a constant acceleration of 4.4 m/s2. What is the car’s final velocity when it merges onto the highway and reaches its cruising speed 4.2 seconds later? A 28.7 m/s B 11.2 m/s C 18.5 m/s D 8.28 m/s

For the most part, will a law of cosines always be one triangle? As in one triangle to solve?

P=(-2,2) Q=(3,4) S=(2,-8) PS-3PQ Find the component form and magnitude of the vector.

Find a unit vector in the direction of the given vector. v=(1,-1)

A total solar eclipse occurs when the moon passes between the earth and the sun, and the darkest shadow cast by the moon, called the umbra, hits the surface of the earth. If the umbra does not hit the surface, as shown in the following figure, then a tota...

Show 2/4 of the set. How many counters?

Frank is traveling the posted speed limit of 36 mi/hr in a school zone. A deer darts out between two cars. He instantly hits the brakes and the car decelerates at a rate of 5.0 m/s^2. a) how much stopping distance will he require in (meters)? b) If he was...

June stands on the roof of the house which is 22.8 m high and she throws the ball at an initial speed of 4.90 m/s downward at Ben who is 1.80m tall. a) With what speed does she hit her target's head and b) how much time was it in the air? Displacement= 21...

The following equation is used to find c, the total cost for printing a quantity of high school yearbooks, b. c=5b+200

How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this Chem homework and it's getting me frustrated, please help!

A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide Use this data to calculate the mass percent composition of aluminum in aluminum oxide. (Sorry need help with this!)

Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→ Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba? Express your answer as a chemical equation. Enter no reaction if no precipitate is formed. (How can we know if a solid is formed in th...

How long does it take light to travel each of the following distances 2462 mi, the distance between Los Angeles and New York. How do we calculate how fast light travels?

Calculate the theoretical yield of alum if 0.200g of Aluminum was reacted with excess KOH and H2SO4? I don't even know how to start it. Please help. Also I wanted to say thank you for the help I've gotten from this website it has helped me a lot. I feel l...

Ho w much water would you need to add to 500 mL of a 0.3 M calcium nitrate solution to make the solution 0.1 M? A. 1.0 L B. 0.50 L C. 1.5 L D. 0.25 L E. 3.0 L The answer is A but I cannot figure it out.

Imagine that you have an ideal gas in a 8.00L container, and that 2850 molecules of this gas collide with a square-inch area of the container at any given instant. If the volume is increased to 56.0L at constant temperature, how many collisions will occur...

V1= 38.8 n1= 1.60*10^-3 V2= 49.9 n2= ? How do we solve for n2 using avogadro's law?

Calculate the freezing point of a water solution at each concentration. 1.40m? What are the steps to calculate this?

Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate...

A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of KOH was required to reach the equivalence point. What is the concentration of the unknown H2SO4 solution? Any help would be grea...

Putting objects together in a group based on a common criterion such as color or shape is called A. the same name. B. classification. C. lookalikes. D. match-ups. my answer is b.

Which of the following activities emphasizes the concept of comparing? A. Dividing pigs and cows into two separate groups B. Dividing farm and wild animals into two separate groups C. Discussing similarities and differences between stuffed and real animal...

How to prepare an EFAS table for United Technologies.

A pill weighs 70 mg. 7/9 of the pill is the active ingredient. How many milligrams are in the part of the pill that is not the active ingredient? So if 7/9 is active that means 2/9 is not active. I did 2 divided by 9 which gives me .22 I then multiplied 7...

A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new chil...

A warehouse worker pushes a crate along the floor, as shown in the figure (Figure 1) , by a force of 9.0N that points downward at an angle of 45∘ below the horizontal. Q1 Find the horizontal component of the push Q2 Find the vertical component of the push...

What must a teacher provide for an open-ended question to be successful? A. Heuristics B. Background information C. Discrepant events D. Disequilibrium my answer I think is b

An 18-month-old child putting large beads in a plastic bowl and pouring them out is A. developmentally superior. B. normal and appropriate. C. developmentally inferior. D. abnormal. my answer I think is a.

When a teacher chooses learning objectives for a child, which question should be asked? A. What should Kelly learn next? B. Where's Kelly in the learning process? C. Do the plan and materials fit my lesson? D. Has Kelly learned what was taught? c.

The following set of numbers respresents the average weekly scores of 9 preschoolers on a verbal aggression scale. 19.1, 18.9, 33.5, 18.7, 28.1, 31.5, 20.3, 30.1, 17.9 Consider this to be the entire population of scores. What is the standard deviation? I...

A population has u=100 and o=20. If you select a single score from this population, on average, how close would it be to the population mean? Explain your answer. I don't understand the question itself. Please help.

In a nominal data set, what is the preferred measure of central tendency?

My 10th grade teacher gave us geometry homework and this problem has me stumped for sure. This rhombus has three interior angles: (5x-2)°, (8y+2)°, and (3x+22)° . We are supposed to find the value of x and y. I tried to use an equation by assigning the fo...

A professor believes that all Thursday sections are cursed and will always score lower on tests compared to Monday sections. To tests this he collects samples of test scores from these two sections. For Monday's section, the mean test score was 60, the es...

kate and alan sell stereos. last month kate sold 24 more stereos than alan. together they sold 164. How many stereos did allan sell?

When 2 parents and 3 children visit a theme park the admission cost is $57. The cost is $33 for 1 parent and 2 children. Find the cost for 1 adult and the cost for 1 child?

Can I please get some help? by+2/3=c, for y

A sports car skids to a stop, leaving skid marks 290 m long. If the coefficient of kinetic friction between tires and pavement is 0.80, how fast was the car going before the skid?

Use similar triangle to solve. A person who is 6 feet tall standing 140 feet from the base of a tree and the tree casts a 150 foot shadow. The person's shadow is 10 feet in length. What is the height of the tree?

A baggage handler throws a 16.0 kg suitcase horizontally along the floor of an airplane luggage compartment with an initial speed of 1.10 m/s . The suitcase slides 2.10 m before stopping.

Which correctly renames 2/3 and 1/2 using a common denominator??

a three digit number with 8 ones and 4 tens. The sum of all my digits is 20. What number am i?

How many numbers are there in pie?

Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observa...

Tanishas mom and the Lemon question. can some show how they got 7 lemons as the answer. Thank you luis

Estimate the value of 51 to the nearest whole number

A series RL circuit contains two resistors and two inductors. The resistors are 43 ? and 54 ?. The inductors have inductive reactances of 70 ? and 40 ?. The total impedance is _____.

How many miles of solute are required to make 90 liters of a 9.0 M solution? A).010 mol B)81 mol C) 100mol D) 91 Mol

What is the concentration of salt in some optical saline solution if 4.0 miles of sodium chloride, NaCl, are dissolved in a total of 3 liters of solution? A) 98 M B) 81 M C) 2M D) 6M

show step solve the Sturm Liouville problem Y"+hY=0, NB: h means lambda y(0)+y'(0)=0 y(1)+3y'(1)=0

There is a spinner with 12 equal areas, numbered 1 through 12. If the spinner is spun one time, what is the probability that the result is a multiple of 4 and a multiple of 6?

Answers

The following answers were posted by visitors named Luis.

Can any one tell me how to get GED test results. I do not have a pin number and the testing center where I took the test said, that they can't help me because I signed for the test along time ago. On this day and edge of technology, it's got to be a way o...

you have to know that the density of water is 1g/mL

What are counters?

b.I count 9 a's 9/45=0.2 c. I count 3 c's 3/45=0.066

Enter the interval [-4,oo)

Hahaha a year later it did come in handy. Thanks brad!

How could you change 7*8 to make a false number sentence?

Honestly I feel like I did something wrong if I do not change the sentence in someway. I also thought it sounded better this way. How would have you written it?

Okay, I will keep that in mind. I appreciate the advice.

periodic - postpone the main idea until the very end of the sentence. They build tension for the end. cumulative - begin with an independent clause, then add in details. They provide immediate understanding of the main idea and supporting detail.

I had the main idea in both completly wrong. I thought the main idea was the half you did not underline. I am going back to figure out where I am going wrong. Thank you so much for the help.

The time he takes to go up from y(max) /2 to the y{max } is the same as the time he falls from y [max ] to y [ max] /2. Let y max = H and then y max = H/2 t1^2 = 2g H/2. ===========1 Simnilarly, Time it takes him to go from the floor to that height t2^2 =...

I am not under standing could you show me ? to tell me ?

I applied the half angle formula for sin and I got the square root of 2 minus the square root of 3 divided by 2 . and for cos I got thesqurof 2 plus thesqr of3divided by 2 .

I really need help . I find this hard Steve .

Do I subtract ?

Nuptunes or rocket roll

-4 (3y + 13) < -16y - 28

what happens to the cosine on the right side, when its in this step cos^3x/sinx + cosxsinx^2/sinx

I got (1/Square root of 2,-1/square root of 2) Thanks

Find a unit vector in the direction of the given vector. w=-i-2j Sorry I messed up it was not a one it was a i.

Can you show me how you finished the equation?

It's asking for it in nanoseconds is there a change in the formula?

Yes, that is true but in my notes the professor never gave us a formula to figure it out. It is asking for an exact number of collisions.

So my mistake was I didn't use enough digits after the decimal place?

Ah, thank you. I really appreciate it. (:

How did you get 198?

Thank you so much! I had already asked this question before but they never explained to me how they got the 198. I really appreciate.

The price of a television set on so it's $216 versus two thirds of the regular price find

nCr 100C18 =3.06645108E19 From a T1-83 calculator Type 100, then MATH,CHOOSE PRB,then scroll down to number 3. Enter.

A protein is the whole structure put together.

Don't know Sorry

I think it's a But it's note or c because they are the same answer but rewritten.

The third letter of the alphabet

It's making it bigger or smaller so the size would change the volume

That helped a lot

I think the answer is d

The answer is the opposite of positive eleven

Ok sorry that was my brother who put that🤗

I know that b and c are wrong because they are both division.if x is the total then you would subtract y or z from x. Since we are looking for z we have to subtract y from x. So which one has y being subtracted from x and equaling z.

Multiply 5 and 3 and the answer to that multiply by 1

You can also do 3x5x1 or any way because you will get the same answer.

how do you get the answer for the Lemons. I know it's 7 more lemons. thank you

If your trying to find another way to find 8+5 i could show you how..... First:add 5+3=8 and if you dont get it here is anote Second: 3+2 or 4+1 wich all =5 And the Last one i did =8 beacuse 5+3=8... My thing:this is how to get 5 or 8 And its like for kid...

Group B ate more pizza

0.381971863420549

I wish you could @ people. Emma you saved my life. Thanks

The nswer is in future tents

Wait, Isn't the number that is less far to the denominator considered the biggest?

I think the answer is 1 so far.

Person gave me a 60%, the answers here are (for connexus students) 1. b 2.c 3. b 4.d 5. b Thank me later.

Is the answer 11/20?

i did check the text and read it several times but i still was not sure about it.but otherwise than . 4 and 7 does my other answers look ok? and can you help me do the process of elimination for i can find the answers for 4 and 7 thank you damon.

His zipper 🍆

wait whats the answer?

I'm interested in multi-unit buildings from 8 214 maybe just 20 apartment buildings if you do call me please leave me a voicemail because I'm a professional boxer and people call me from all around the world and you could send me a link awesome to my emai...

Natt got me a F😭😭

i got 0% thanks for nothing DARKKKK🤬🤬🤬🤬