# Posts by justin

Total # Posts: 962

**Physics - Help!!!**

I want to be sure I'm using the right formula for this question: Calculate the electric force between 2 electrons that are 5.3 x 10^-11 m apart (electron charge = -1.6 x 10^-19 C) I'm using the equation for Coulomb's Law: F = K (q1 q2)/d^2 (-1.6 x 10^-19)(-1.6 x 10...

**Physics - Help!!!**

I am having trouble understanding transformers!! Here is the problem I have to solve: A protable CD player requires 12 volts to operate. A transformer allows the device to be powered from a 120-volt outlet. If the primary has 500 turns, how many turns should the secondary have...

**Physics**

A portable CD player requires 12 volts to operate. A transformer allows the device to be powered from a 120-volt outlet. If the primary has 500 turns, how many turns should the secondary have?

**Math**

a + 7b = 7 a + 2b = -3

**english romeo and juliet**

I need a artifact for the story with quotes and the artifact can not be in the story just has to represent quotes from the story

**Philosophy**

i need the questions answered ms.sue

**Philosophy**

Please help answer these questions Argument: Anything is possible Therefore, it must be possible that something is impossible This is a contraction - Not everything is possible because anything is possible. Types of appeals in arguments (Aristotle) Pathos - appeals to emotion ...

**intro to ethics - philosophy**

I need the answers for these not for someone to check them

**intro to ethics - philosophy**

REWRITE: 1) Correct the problems with this title: Author And The Seventh Day 2) Place commas: Afterwards John went home and he went to bed. 3) What is wrong with this sentence?: John went home, he went to bed. 4) Place a question mark: “ What do you want from this class&#...

**algebra**

2x+y=4 -x+y=1

**Physics**

Three point charges, +6.7e-6, +2.5e-6, and -3e-6, lie along the x-axis at 0 cm, 2.4 cm, and 5.7, repectively. What is the force exerted on q1 by the other two charges? (to the right is positive) . The coulomb constant is 8.99*10^9 N*m^2/C^2 What is the force exerted on q2 by ...

**Physics**

If an object has twice the electric potential of another object, does it also have twice the electrical potential energy? Why or why not?

**math**

In the glass atrium at the entrance to the city aquarium, a designer wants to suspend a 2400-N sculpture of a dolphin. It will be secured by three chains, each of length 4 m. The chains are anchored to the ceiling at three points, spaced 3 m apart, that form an equilateral ...

**College Algebra**

bank a is lending money at 5.7% interest compounded annually. The rate at bank b is 5.6% compounded monthly, and the rate at bank C is 5.65% compounded quarterly. Which bank will you pay the least interest?

**Math**

Need to find equation for 1250=1200+4-375. Is this possible or impossible. Need to find how to figure these type of questions. This is 3rd grade homework

**physics**

answer is 60-apex

**language arts**

My mom went to the grocery store.she forgot her purse

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest I have used the equation, but im doing something wrong, so if i could get the answer instead of just the equation it would...

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

**math**

so how to do i find out if its a right triangle?

**math**

micheal drew a triangle with the sides measuring 12.5cm,30cm,32.5cm. using the pythagoream theorm determine of micheals triangle is a right triangle. explain. PLEASE HELP ME WITH THIS ONE!!

**algebra**

sara can take no more than 22 pounds of luggage on a trip. her suitcase weighs 112 ounces. how many more pounds can she pack and not go over the limit?

**Math**

What does x equal in x^2/(.81-x)?

**Chemistry**

What is initial concentration of a sodium acetate if the pH (at epuilibrium) is measured to be 9.30?

**chemistry**

Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)

**6 grade math**

how do you work out this problem, find the height of a parallelogram with an area of 224 square meters and a base of 16 meters.show work please thank you

**6 grade math**

how do you find the height of a triangle with an area of 245 square inches and a base of 14 inches.

**6 grade math**

find the height of a triangle with an area of square inches and a base of 14 inches

**6 grade math**

yes

**6 grade math**

how do you find the height of an area of 245 square inches and a base of 14 inches.

**Chemistry**

Which of the following would you add to a mixture of CaCO3(s) and its saturated solution to increase the molar solubility of CaCO3: more water, Na2CO3, NaOH, NaHSO4? Explain.

**chemistry**

A solution is saturated with Ag2CrO4. a) Calculate [CrO4^2-] in this saturated solution. b) What mass of AgNO3 must be added to 0.635 L of the solution to reduce [CrO4^2-] to 1.0* 10^-8M?

**physics**

5.6kg

**statistics**

dsva

**Living environment**

acidic substance secreted by glands in the stomach wall is it pepsin enzyme that breaks down starch into maltose is it salivary amylase organ in which bile is stored is it gallbladder

**chemistry**

Ca(OH)^2 does not completely dissociate. It only partially dissotiates in water to form OH- and Ca+2. An equilibrium mixture of Ca(OH) and its dissolved ions is found to have a pH= 10.3 what is Kc for this dissociation?

**Science**

Describe a hybrid plasmid. What is this?

**Stats**

a coin is tossed twice, or until the first "tails" appears, whichever comes first. which of the following is the sample space for this random experiment? A, S=(H, T) B. S=(T, HT, HH) C. S=(T, TT)

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...

**perimeter problems math**

janet built a 5-inch ny 7-inch rectangle A:what is the perimeter of janets rectangle? B:the perimeter of olivia's rectangle is 150% as long as janet's. what is the perimeter of olivia's rectangle? C. what is the area of janets rectangle? D.the area of walters ...

**algebra**

28 decreased by 6 times a number is the same as the number

**IB MATH STUDIES IA**

I meant actually who has better memory

**IB MATH STUDIES IA**

I am finding whether men or women are smarter. I am doing a chi-squared test to see if theres a correlation. What other sophisticated processes can i do?

**English**

Find The Subject and Verb in this sentence. Candle wax dripped onto the table and hardened into pools.

**chemistry**

Hmm idk the answer

**Math**

The probability of getting an odd number is 5/10 using a game spinner. The denominator of that probability is:

**English**

What is the syntax in,bending, I bow my head and lay my hand upon her hair, combing and think how do woman do this for each other.

**Math**

The endpoints of one diagonal of a The The endpoints of one diagonal of a rhombus are (0, -8) and (8, -4). If the coordinates of the 3rd vertex are (1, 0), what are the coordinates of the 4th vertex? (7, -12) (7, -8) (-8, -4) (-4, -12)

**Algebra I**

(3x to the fourth - 5x squared - 6x +5) + (-4x cubed + 6x squared + 7x -1)

**math**

i don't know that's what i need help with

**science-VERY URGENT**

No, don't pick b because it's an isolating situation.

**science-VERY URGENT**

I would say C. No promises though. But go with c

**science-VERY URGENT**

Yeah hummingbirds is the answer

**science-VERY URGENT**

Hummingbirds. They have a huge beak thing to poke down the long tube. And they love red. Mice come out at night Bees have to land

**Biology**

Probably rough endoplasmic reticulum. An enzyme is a protein. You call it rough because it is studded with ribosome units. Ribosomes make proteins. More protein "factories" equals more enzyme to be released Note: Lysosome's are were you send proteins to be destroyed

**MATH**

SUPPOSE IT TAKES NO MORE THAN 25 MIN FOR YOU TO GET TO SCHOOL. IF YOU HAVE TRAVELED FOR 13.5 MIN ALREADY, HOW MUCH LONGER, AT MOST, MIGHT YOU TAKE TO GET TO SCHOOL? PLS HELP ME. I NEED TO SOLVE AN INEQUALITY THAT MODELS THIS PROBLEM. THANKS

**MATH**

THE AVERAGE WIND SPEED INCREASED 19 MILES/H FROM 8 AM TO 12 NOON. THE AVERAGE WIND SPEED DECREASED 5 MI MI/H FROM 12 NOON TO 4 PM. AT 4 PM, THE AVERAGE WIND SPEED WAS AT LEAST 32 MI/H. WHAT IS THE MINIMUM VALUE OF THE AVERAGE WIND SPEED AT 8 AM? NEED TO SOLVE AN INEQUALITY ...

**math, inequalties**

THIS SEASON, NORA HAS 125 AT BATS IN SOFTBALL. BY THE END OF THE SEASON SHE WANTS TO HAVE AT LEAST 140 AT BATS. HOW MANY MORE AT BATS DOES NORA NEED TO REACH HER GOAL? PLEASE HELP, I NEED TO WRITE AND SOLVE AN INEQUALITIES THAT MODEL THE SITUATION. THANKS

**math, inequalties**

IT WILL TAKE AT LEST 360 POINTS FOR KIKO'S TEAM TO WIN THE MATH CONTEST. THE SCORES FOR KIKO'S TEAMMATES WERE94, 82, AND 87, BUT ONE OF KIKO'S TEAMATES LOST 2 OF THOSE POINTS FOR AN INCOMPLETE ANSWER. HOW MANY POINTS MUST KIKO EARN FOR HER TEAM TO WIN THE CONTEST

**3rd Grade math**

What multiplication fact can be found by using the arrays of 2x9 and 5x9?

**Calculus**

5.60 ft and 5.60 ft

**science**

help im stuck!!!!!!!

**science**

How did Archimedias prove mathematically that salt water and diving were related to buoyancy?

**social studies geography**

I need help with social studies definition of social ranking

**math**

After flying at an altitude of 600 meters,a hot air balloon starts to descend when its ground distance from the landing pad is 10 kilomeers.What is the angle of depression for this part of the flight?

**science**

a 425 g cylinder of brass is heated to 90/0 degree C and placed in a calorimeter containing 334 g of water at 25.0 degree C. The water is tirred and its highest temperature is recorded as 32.0 degree C. From the thermal energy gained by the water, determine the specific heat ...

**science**

as 390 g of hot milk cools in a mug, it transfers 30,000 J of heat to the environment. What is the temperature change of milk? The specific heat of milk is 3.9 J/g degree C.

**science**

how many kilojoules of heat must be transferred to a 480 g aluminum pizza pan to raise its temperature from 22 degree c to 234 degree c? The specific heat of aluminum in this temperature range is 0.97 J/g degree C.

**SS**

Thanks.:D What are the 2 others? Does anyone else know?

**SS**

What are the 3 most visited "natural attractions" in the U.S.?

**Math**

wedsday

**SOCIAL STUDIES**

In 1900 for health reasons the course of what river was changes in the U.S. making it world's only river to flow backwards?

**algebra**

Dale is choosing between two exercise routines. In Routine #1, he does only running, burning 10 calories per minute. In Routine #2, he burns 10 calories walking. He then runs at a rate that burns 8 calories per minute. For what amounts of time spent running will Routine #1 ...

**Chemistry**

At2 26.3C, F2 molecules have a certain value of rms speed. At what temperature would the rms speed of O2 molecules be the same?

**social studies**

what is the landmarks of newjersey?

**Finance**

I have a case study to do and I'm not sure how to go about it. I need to find the present value for three different offers, all of which have a 10% rate and ordinary annuities. This is the first offer: $1,000,000 now $200,000 each year for years 6 through and including ...

**math**

find the average 2 1/3 3 3/4

**math**

find the average 5/8,2/5,1/40

**math**

8/25 / 1/5 *6/5

**Chemistry**

I have this question and I am pretty sure on what to use to solve it but I am just stuck. The reaction of 8 g of hydrogen and 28 g of carbon monoxide gave 16 g of methanol. What was the theoretical yield if the percent yield was 50%? actual yield ________________ X 100% = ...

**geometry**

MN and ML are oppisite rays if

**Math 7**

How do you plot the answer ( on a number lime) if all three answers are the same?

**Chem**

write the dissociation of acetic acid identifying the base,acid,H donor, and H receiver C2H4O2+H2O - H3O+C2H3O2 is hydronium the H donor and is C2H3O2 the base?

**Chem**

my guess is 10,000 because ph is a log scale but that seems off

**Chem**

How many more [H+] are there in a sol’n of pH2 than pH6?

**watson go to birmingham**

what are the watsons like? do you thing their "weird"?

**MATH PLEASE HELP!!!!!**

i got 5.5

**History**

homo sapiens came to north america by...????

**physics**

. A water heater can has a power of 350 W. It is placed in a container filled with 1 litres of water with a temperature of 40 ºC. The heater is then allow to run for 1 hour. How much water will there be left in the container after 1 hour? (Specific heat capacity of water...

**physics**

A diver descent 100 m below sea level. If the density of sea water is 1024 kg m-3, find the pressure she will experience.

**math 1012**

what is the sum of the lengths 39cm and 2m

**Geometry**

I have a question! Can someone please answer the same question but with the numbers 35, 56, 35, 84,110

**Pre Calc**

Verify the following identity: sin(x)*cos(x)*(cot(x)+tan(x))=1 show work

**Physics**

A 0.02 kg-lead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?

**chemistry**

If 1.5 mol of each of the following compounds is completely combusted in oxygen, which one will produce the largest number of moles of H2O and why?

**Physics**

A 3.00-liter aluminum cylinder at 5.00°C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 52.0°C, how much gasoline spills out? [Hint: Be sure to account for the expansion of the container. Also, ignore the ...

**algebra 2**

if a3 = 20 and a6=41 for an arithmetic sequence, find a1

**7th math**

Simply the expression. -1 - (-3x + 2) - 7x + 8