# Carolyn

Newest questions and responses by Carolyn-
## Chemistry

How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0 ∘C, to steam at 115 ∘C. The heat capacity of ice is 2.09 J/g∘C and that of steam is 1.84 J/g∘C.

*asked on April 19, 2018* -
## Math

A grandmother needs $50,000 for her here grandsons university in 10 years. She plans to make equal bi-weekly payments to a savings account for the first 6 years at an interest rate of 3.9% compounded bi-weekly. She will then leave that sum to accumulate

*asked on March 1, 2018* -
## Math

Mira has 20 gallons of water. She used 8 1/2 gallon to water the roses and 7 1/2 gallons to water lilies. How much water does she use have left?

*asked on February 12, 2018* -
## Algebra (Please help!)

Hey! I've been having a lot of trouble with this, please help! x - 7 > 10 x > __ 3x < 20 (underscore under the less / greater than sign) x < __ 5a - 2 < 8 a < __ 2t + 8 > 4(t + 1) (underscore under the less/greater than sign) t > __

*asked on October 12, 2017* -
## English

2. ______________________ is the point of view that is most like a video camera recording events. a.First Person b.Objective c.Limited Omniscent d.Omniscent I think it is C, but I'm not really sure. Could really use some help, thanks!

*asked on September 17, 2017* -
## physics

A car slows down uniformly from a speed of 24.0 m/s to rest in 4.50 s. How far did it travel in that time?

*asked on December 18, 2016* -
## math

Find an equation of the line that satisfies the given conditions. through (2, 4) perpendicular to x − 4y + 7 = 0 I know that you would set it up as -4y = -x - 7, but would you divide the 4 to get slope = (1/4)x, which would make the perpendicular slope

*asked on January 29, 2016* -
## math

Find an equation of the line that satisfies the given conditions: through (2, 4), perpendicular to x − 4y + 7 = 0.

*asked on January 27, 2016* -
## Pre Algebra

My problem is evaluate the expression -1 11/16 - (-4 1/6)? 1) -27/16 + 25/6 = -81/48 + 200/48 = 119/48 = 2 23/48 2) -1 33/48 + 4 8/48 = 3 41/48 Have to do it two ways, why can't I get the same answer. What am I doing wrong? Thank you very much

*asked on January 26, 2016* -
## math

Let f(x) = 2x/(x^2+9). Find the domain of f. Write your answer using interval notation.

*asked on January 21, 2016* -
## geometry

The circle in the figure below has radius r. What is its equation in standard form?

*asked on January 20, 2016* -
## Geometry

mx^2+12x+9m=0. for what values of m will the equation have one repeated root? I can't remember how to calculate double root values

*asked on December 7, 2015* -
## physics

A laser with a power output of 2 mW at a wavelength of 400 nm is projected onto a calcium metal surface. What power is carried away by the electrons? The binding energy of the metal is 2.31 eV.

*asked on November 27, 2015* -
## physics

On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0 °C in 120 s. The specific heat of spaghetti is 3760 J/kg °C and the microwaves are absorbed over a circular area 20.0 cm in diameter. What is the

*asked on November 27, 2015* -
## physics

A severely myopic patient has a far point of 5.00 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? Assume the image at the back of the eye is formed 0.2 m from the eye's

*asked on November 27, 2015* -
## physics

An ECG monitor must have an RC time constant less than 100 μs to be able to measure variations in voltage over small time intervals. If the resistance of the circuit (due mostly to that of the patient’s chest) is 1000 Ω, what is the maximum capacitance

*asked on November 15, 2015* -
## physics

An electrostatic paint sprayer has a 0.200-m-diameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a grounded object. What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?

*asked on November 9, 2015* -
## physics

Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to

*asked on November 8, 2015* -
## physics

A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

*asked on November 8, 2015* -
## physics

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?

*asked on November 8, 2015* -
## physics

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?

*asked on November 7, 2015* -
## Physics

Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to

*asked on November 7, 2015* -
## physics

A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

*asked on November 7, 2015* -
## physics

A circular wire is connected to a galvanometer. A solenoid is placed inside the circular wire. The solenoid has 520 turns per meter, a cross-sectional area of 0.007 m^2 and a current charge from 0A to 0.7A in 1.25 ms. The circular wire has a n are of

*asked on October 22, 2015* -
## english

Dr.king was born on January 15, 1929 and he died on April 4, 1968.

*asked on October 15, 2015* -
## Math

A rectangular prism has a volume of 256 cubic feet, what are the dimensions in feet of the prism?

*asked on July 11, 2015* -
## geometry

i need to figure out side lengths of congruent right isosceles triangle with no lengths given. I know that the hypotenese is 1 per pythogoras constant and the area is a^2/2. I don't have to prove area just side lengths.

*asked on May 21, 2015* -
## Physics

A 4 kg block is placed on an incline at an angle of 30 degrees. If the coefficient of static friction is 0.3 and the coefficient of kinetic friction is 0.2 what is the net force on the block?

*asked on April 25, 2015* -
## chemistry

One mole of an ideal gas is expanded from a volume of 1.00 atm. How much work (in joules) is performed on the surroundings? Ignore sig figs for this problem. (T=300 K; 1 L*atm=101.3 J)

*asked on April 14, 2015* -
## physics

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn

*asked on April 7, 2015* -
## physics

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with

*asked on April 7, 2015* -
## Physics

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with

*asked on April 6, 2015* -
## Physics

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn

*asked on April 6, 2015* -
## Physics

How far does water travel if you restrict the hose opening by 80%

*asked on April 4, 2015* -
## physics

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn

*asked on April 4, 2015* -
## physics

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with

*asked on April 4, 2015* -
## Physics

In 2286, Admiral Kirk and his crew were forced to use the slingshot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a

*asked on March 23, 2015* -
## Physics

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via

*asked on March 23, 2015* -
## physics

A 1kg block of wood is moving with a velocity of 10 m/s on top of a table. The coefficient of kinetic friction between the block of wood and the table is 0.1. The block of wood is a cube with sides of 12 cm. How far does the block move before coming to a

*asked on March 23, 2015* -
## Physics

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via

*asked on March 19, 2015* -
## Physics

In 2286, Admiral Kirk and his crew were forced to use the slingshot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a

*asked on March 19, 2015* -
## Physics

A 1kg block of wood is moving with a velocity of 10 m/s on top of a table. The coefficient of kinetic friction between the block of wood and the table is 0.1. The block of wood is a cube with sides of 12 cm. How far does the block move before coming to a

*asked on March 19, 2015* -
## Physics

A projectile is launched from a compressed spring on an inclined plane. The spring constant of the spring is k= 10 N/m, the mass is 1kg and the plane is inclined 30 degrees to the horizontal. If the spring is compressed 15 cm what will be the velocity of

*asked on March 18, 2015* -
## physics

A skateboarder in a death defying stunt decides to launch herself from a ramp on a hill. The skateboarder leaves the ramp at a height of 1.4m above the slope, traveling 15m/s and at an angle of 40 degrees to the horizontal. The slope is inclined at 45

*asked on February 25, 2015* -
## physics

A skateboarder in a death defying stunt decides to launch herself from a ramp on a hill. The skateboarder leaves the ramp at a height of 1.4m above the slope, traveling 15m/s and at an angle of 40 degrees to the horizontal. The slope is inclined at 45

*asked on February 25, 2015* -
## physics

Tarzan is running towards a cliff, ready to swing down rescue Jane from some poisonous snakes, and make it back up to a tree on the other side. For now, we are going to assume energy is conserved and ignore momentum. If the height of the cliff is 10m, the

*asked on February 3, 2015* -
## Physics

Consider a modified Atwood machine, with a mass sitting on an inclined plane connected by a string which stretches over a pulley connected to a hanging mass. Friction is ignored. Draw a free body diagram for both blocks. Apply Newton's second law to both

*asked on February 3, 2015* -
## physics

Tarzan is running towards a cliff, ready to swing down rescue Jane from some poisonous snakes, and make it back up to a tree on the other side. For now, we are going to assume energy is conserved and ignore momentum. If the height of the cliff is 10m, the

*asked on February 2, 2015* -
## physics

Consider the following system with a 2 kg mass sitting on a table, connected to both 1 kg and 3 kg masses by strings which go over two separate pulleys and are pulling on the 2 kg mass in opposite directions. What static friction coefficient would be

*asked on February 2, 2015* -
## physics

Consider a modified Atwood machine, with a mass sitting on an inclined plane connected by a string which stretches over a pulley connected to a hanging mass. Friction is ignored. Draw a free body diagram for both blocks. Apply Newton's second law to both

*asked on February 2, 2015* -
## Algebra

How many 12-inch square tiles are needed to completely cover the floor of a greenhouse that is 25 feet by 40 feet ?

*asked on January 26, 2015* -
## LSAT PREP

A company employee generates a series of five-digit product codes in accordance with the following rules: The codes use the digits 0, 1, 2, 3, and 4, and no others. Each digit occurs exactly once in any code. The second digit has a value exactly twice that

*asked on January 6, 2015* -
## math

could you please show me the steps to do this problem? 8 2/7-7 1/3

*asked on December 9, 2014* -
## Economics

EconMacro4 Chapter 9 Aggregate Expenditures and Demand 7. A. What are the components of aggregate expenditure? Page 148 Add to the consumption function, investment, government purchases and net exports (C + I + G + (X-M). B. In the model developed in this

*asked on October 26, 2014* -
## comp1

Contrast/comparison on the Parent Trap and the Remake of the Parent Trap I need help asap.

*asked on October 5, 2014* -
## Math z-scores

find the z-scores for which 92% of the distribution's area lies between -z and z

*asked on September 30, 2014* -
## Math 221

A distribution center receives shipment of a product from three different factories in the quantities of 60, 30 and 20. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from

*asked on September 15, 2014* -
## Math 221 Week3

A probability experiment consists of rolling a 6 sided die. Find the probability of the event below: rolling a number less than 3? The probability is

*asked on September 15, 2014* -
## Math 221 Week3

A distribution center receives shipment of a product from three different factories in the quantities of 60, 35 and 25. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from

*asked on September 15, 2014* -
## geometry

Construction: The midpoint of a line segment can be constructed. Theorem: If the consecutive midpoints of the sides of a parallelogram are joined in order, then the quadrilateral formed from the midpoints is a parallelogram. Write an essay (suggested

*asked on July 10, 2014* -
## algebra

how do you graph linear equation 2x= -10y and x+5y=3

*asked on May 23, 2014* -
## FIN1103-39

You think in 15years, it will cost $214,000 to provide your child with a 4 year college education. Will you have enough if you take $75,000 today and invest it for the next 5 years with $1million

*asked on April 27, 2014* -
## Proximity, alignment, repetition and contrast

Patterns and shapes that appear alike and are grouped together produce

*asked on April 24, 2014* -
## Composition

How does taking observations obstruct or halt the writing process

*asked on March 27, 2014* -
## Interent Basics

The social networking site tat caters to artists and musicians

*asked on February 2, 2014* -
## child development

tyrone groups words with agent qualities as subjects and words with action qualities as verbs. he then merges these categories into sentences. tyrone is demonstrating?

*asked on November 7, 2013* -
## calculus

i need help with proving five steps of l hospitals rule for (ex^2-1)/x

*asked on October 30, 2013* -
## Finance

the cost in 15 years is 214,000 to provide a college education. Can I have enough to take $75,000 today and invest it for the next 15 years at 5%?

*asked on October 27, 2013* -
## american history

. Which of the following was the primary cause of the Balkan Wars conducted during the Clinton administration? A. The rise to power of Slobodan Milosevic in Serbia B. Muslim activism in Bosnia C. The UN peacekeepers' inability to stem ethnic cleansing D.

*asked on October 6, 2013* -
## History

Which of the following statements about John D. Rockefeller is most accurate? A. He founded the Standard Oil Company when he was 24 years old. B. He considered competition to be the central ideal of capitalism. C. He drilled the first oil well near

*asked on September 29, 2013* -
## Chemistry

How many grams of MgO are produced during an enthalpy change of -96.0 KJ if 2Mg(s) + O2(g) -> 2MgO(s) and delta H= -1204kj

*asked on August 13, 2013* -
## social studies

Is this answer right? my answer has ( ) around it The first fully developed American factory system emerged in the _______ industry. A. iron B. distilling C. sugarcane (D). textile

*asked on July 30, 2013* -
## social studies

I was wondering if this is right my answer has ( ) around it During Jefferson's presidency, cities were (A). mainly ports for international trade. B. mostly the haunts of thieves and degenerates. C. mainly industrial centers. D. mostly found along the

*asked on July 16, 2013* -
## social studies

my answer has ( ) around it With respect to the eighteenth century, the concept of the "middle ground" is helpful in A. understanding the attitudes of Indians living between the Appalachians and the Mississippi. B. explaining the attitudes and preferences

*asked on July 16, 2013* -
## social studies

Can someone tell me if this is correct my answer has ( ) around it The Articles of Confederation called for which of the following? A. The Northwest Ordinance B. A chief executive (C). A single legislative body D. The right of the legislature to assess

*asked on July 15, 2013* -
## econ

Congress' control over the Fed is a. substantial because it can cut off necessary appropriations b. limited because the Fed is not dependent on Congress for the funds to support its operations c. substantial because the members of the Board of Governors

*asked on May 27, 2013* -
## econ

Suppose the reserve requirement ratio is 20 percent. Assuming no bank holds excess reserves and nobody withdraws cash, a $10,000 injection of new excess reserves by the Fed can create A) $2,000 in new checkable deposits B) $10,000 in new checkable deposits

*asked on May 27, 2013* -
## Chemistry

Write a procedure to demonstrate the effect of higher concentrations of HCl on its rate of reaction with antacid tablets. I have HCl with a concentration of 1.0 mol/L. This is what I have so far. Are my concentrations correct for this procedure? E is my

*asked on May 22, 2013* -
## Computers

Which of the following operating system types is used in medical equipment or a cash register? A. Multi-user/multi-tasking B. Real-time C. Single-user/multi-tasking D. Single-user/single-tasking

*asked on May 22, 2013* -
## math

jim has grades of 84, 65, 76 on three tests. what grade must he obtain on the next test to have an average of exactly 80% for all four tests?

*asked on April 27, 2013* -
## Investments

At the end of each year a self-employed person deposits $1,500 in a retirement account that earns 10 percent annually. a) How much will be in the account when the individual retired at the age of 65 if the contribution start when the person is 45 years

*asked on April 25, 2013* -
## ela

"That suddenly above the bee is heard," Is this an example of sensory language? It pertains one of the 5 senses(hearing)so I'm assuming.

*asked on March 21, 2013* -
## Math

The base of the skateboard ramp has an area of 2.3 m square meters the height of the ramp is 1.2 m find the volume of the rectangular prism? Help please

*asked on March 5, 2013* -
## Math 6th grade

The base of the skateboard ramp has an area of 2.3 m square meters the height of the ramp is 1.2 m find the volume of the rectangular prism?Please help!

*asked on March 5, 2013* -
## physics

A rigid rod holds a restaurant sign horizontally from the side of a building. The force due to gravity acting on the sign is 165N with the angle between the sign and the rod being 50 degrees. Ignoring the weight of the rod what is the magnitude of the

*asked on February 6, 2013* -
## physics

While sitting in a lounge chair with the back inclined at an angle of 10 degrees from the vertical, you tuck a pillow between your head and the chair. Then you lower the chair back to 40 degrees and doze with the pillow in place. How has the net force on

*asked on February 6, 2013* -
## Physics

A force of 5N and a force of 15N acting on an object can produce the following net forces except a. 20N b. 15N c. 10N d. 5N

*asked on February 6, 2013* -
## physics

An objectis at rest on an incline. The component of gravity acting downward and along the incline on the object is described as Fg,x = +8.0N. Which axis is pointing up the incline? a. + x axis b. + y axis c. - x axis d - y axis

*asked on February 6, 2013* -
## physics

Which of the following situations describes inertia? a. A stationary object tends to resist being moved. b. A moving object tends to resist a change in speed. c. A moing object tends to resist a change in direction d. all of the above

*asked on February 6, 2013* -
## physics

Two forces act on an object. The magnitude of the net force acting on the object a. equals the sum of the magnitude of the two forces b. equals the difference in the magnitudes of the two forces c. equals the average of the two forces d. cannot be

*asked on February 6, 2013* -
## physics

Which of the following is true of inertia? a. It is described in Newton's first law of motion b. It is a property of motion c. It is measured by weight d. all of the above

*asked on February 6, 2013* -
## astronomy

Assume that the mass of a sun-like star is 2.50 x 10^5 Earth masses and that its radius is about 101.0 times that of Earth. The density of Earth is about 5,500 kg/m^3. What is the density of this star?

*asked on February 4, 2013* -
## Statistics

A quality control inspector wants to estimate the mean inside diameter of the washers produced by a certain machine. A preliminary sample indicates that the inside diameters have a standard deviation of 0.30 millimeters. What sample size does he need to

*asked on December 6, 2012* -
## statistics

The number of grams of carbohydrates in a 12-ounce serving of a regular soft drink is listed here for a random sample of sodas. Find the 99% confidence interval for the mean number of carbohydrates in all brands of soda. 48 37 52 40 43 46 41 38 41 45 45 33

*asked on November 21, 2012* -
## statistics

The following data set gives FICO credit scores of a sample of 40 mortgage applicants to a local bank. (Note that the scores are in increasing order for your convenience.) 444, 497, 502, 517, 532, 559, 568, 598, 611, 636, 637, 657, 681, 681, 693, 698, 701,

*asked on November 14, 2012* -
## statistics

I need help with p for a hypothesis test for normal distribution.

*asked on October 20, 2012* -
## Math

two times the sume of 3 and y amounts to 24

*asked on September 25, 2012* -
## Algebra

A.Driving from El Paso to San Antonia on a bus ...560 miles traveling at avg speed of 60 miles per hr how do I make a graph with the time & distance. B. have to estimate distance bus tvls in 2 hrs...2 3/4 hrs...3.5 hrs...7.25 hrs.. C.need to describe in

*asked on August 27, 2012* -
## Science

If oxygen, Carbon dioxide, and xenon gases are heated at 500k with a probable particle speed of 1094 and an average particle speed of 1234, what id the mass of an atom or molcule for each?

*asked on July 20, 2012* -
## precal

De Moivre’s theorem states, “If z = r(cos u + i sin u), then zn = rn(cos nu + i sin nu).” • Verify de Moivre’s theorem for n = 2. a. Provide a correct proof that includes written justification for each step.

*asked on July 13, 2012*

## Pages

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