# find the derivative of y=(3x+1)^2 y= square root 13x^2-5x+8

97,722 questions, page 817-
## Geometry Question

Can someone show me how to solve this?The measure of an angle is 20 less than 3 times its supplement. Find the measure of the angle. Let M be the measure of the angle. M+20=3(180-M) solve for M.

*asked by jim on July 24, 2007* -
## Algebra

Laura has a roll of ribbon. There are 20 yards of ribbon on the roll. What equation can Laura use to find the number of inches of ribbon on the roll

*asked by Jacob on March 10, 2011* -
## math

The diagonal brace of a shipping crate is 53 inches. The length of the shipping crate is 45 inches. Find the height of the shipping crate. if i would use a^2+b^2=c^2 would it be 53^2+45^2=c^2 is this right

*asked by jennifer on September 27, 2008* -
## Chemistry

How do I find the molarity of Fe(SCN)2+? I know the molarity of SCN=0.1 and the molarity of Fe is 0.0001. The volume of SCN is 5 mL and the volume of the Fe is also 5mL. I also think that I use M1V1=M2V2.

*asked by Brittany on February 5, 2011* -
## Math Algebra

Jessica is 4 years younger than Jennifer now. In 10 years, Jessica will be twice the age that Jennifer is now. Find the present ages of Jennifer and Jessica

*asked by Timothy on January 10, 2015* -
## algebra

a body dropped from a height falls 16 feet during the first second, 48 feet the second second, 80 feet the third second, and so on. Find how far the body falls during the 7th second and how far it falls during the first 7 seconds

*asked by jep on October 1, 2016* -
## calculus

A piecewise function is given. Use the function to find the indicated limits, or state that a limit does not exist. (a) lim is over x-->d – f(x), (b) lim is over x-->d + f(x), and (c) lim is over x-->d f(x) x^2 - 5 if x < 0 f(x)= -2 if x ->0 ; d = -3 1.

*asked by Kelly on December 13, 2007* -
## Writing Essay

Where will you find the thesis sentence in an introduction paragraph? A.The middle of the paragraph B.Immediately after the topic sentence C.The last sentence of the introduction paragraph. i got C.

*asked by ciara on October 5, 2011* -
## Chemistry

How do I find the total mass of sample in a solution? I have: Volume of the solvent Mass of the solvent Mass of sample added I do not know what the sample is. Thanks!

*asked by Mike on September 8, 2012* -
## math

The diagonal brace of a shipping crate is 53 inches. The length of the shipping crate is 45 inches. Find the height of the shipping crate. please help!

*asked by jennifer on September 26, 2008* -
## Geometry

the width of a rectangle is 25% of the length. The perimeter is 250 cm. Find the width and the length of the rectangle. (length = 100 cm and width = 25cm)

*asked by Valery on April 10, 2011* -
## Mathematics

A knife Has a mass of grammes .it's 20g heavier than spoon the mass of a knife and four spoon is 330 .find the mass of the knife

*asked by Gift uwaje on September 4, 2018* -
## Physics

A 75 kg box slides down a 25.0 degree ramp with an acceleration of 3.60 m/s^2. Find coefficient between the box and the ramp. What acceleration would a 175 kg box have on this ramp?

*asked by Terrence Eko on November 12, 2009* -
## math

The average mass of a group of children is 36kg. If 3/7 of the no. of children are girls and their average mass is 32 kg, find the average mass of the boys.

*asked by Anonymous on July 27, 2014* -
## Statistical reasoning in Psychology

4. Suppose that previous studies have found that the mean amount of sessions necessary to “cure” depressive patients using a particular therapeutic model is 25 sessions, with a standard deviation (σ) of 4. A new model is introduced, and you want to

*asked by Lilah on November 1, 2009* -
## Physics 203

A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg. (a) Find the speed of the 2 kg block after

*asked by Kayla on April 6, 2011* -
## Physics

were are doing free fall right now in the class the question is A worker drops a wrench form the top of a tower 80.0m tall. What is the velocity when the wrench strikes the ground? I know that the change of distance 80.0m I know aceleration of free fall is

*asked by Anonymous on October 18, 2008* -
## physics

A convex mirror in an amusement park has a radius of curvature of 3.00m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image? I calculated the

*asked by Daniel on March 17, 2012* -
## Phyics

A 1390-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

*asked by Johnson on November 10, 2013* -
## algebra

How do you solve this math problem? h= -8t^2+40t then it says: when t=0 and when t= 5 there are 2 questions that i have to answer: 1.) find the value of h 2.) graph this equation - i don't know if i did the problem right but when i answered #1 i got h=0, -

*asked by Rachel on May 21, 2010* -
## Social Studies

Can someone help me with this question? A) With the emergence of urban cities came the need for a distinct city government, including the role of the boss. B) What were the positives and negatives of having a boss in the city government? C)Do you think the

*asked by Janye on April 7, 2010* -
## statistics

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go

*asked by shane on March 19, 2017* -
## mathematics

A train takes 5mins to cover a distance of 3km between two stations P and Q. Starting from rest at P, it accelerates at a constant rate to a speed of 40km per hour and maintains this speed until it is uniformly brought to rest at Q. If the train takes

*asked by Michael on March 14, 2016* -
## statistics

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go

*asked by liz on November 13, 2016* -
## physics question

A 278-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the log has an

*asked by michelle on October 27, 2010* -
## Physics

7 g bullet is ﬁred into a 124 g block that is initially at rest at the edge of a frictionless table of height 1.3 m. The bullet remains in the block, and after impact the block lands 2.2 m from the bottom of the table. Find the initial speed of the

*asked by Hannah on May 7, 2016* -
## physics

wave speed: the violin is a four stringed instrument tuned so that the ratio of the frequencies of adjacent strings is 3:2. (This is the ratio when taken as high frequency to lower frequency.) If the diameter of E string (the highest frequency) on a violin

*asked by zoe on December 3, 2012* -
## Chemistry

Question: Antimony (V) chloride, SbCl5, dissociates on heating to SbCl5(g)goes to SbCl3(g)+ Cl2(g). A closed 3.50 L vessel initially contains 0.0125 mol SbCl5. what is the total pressure at 248 degree's C when equilibrium is achieved? The value of Kc at

*asked by eliz on February 25, 2009* -
## physics

A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 99-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal

*asked by sarah on August 14, 2015* -
## Physics

Consider the 52.0-kg mountain climber in the figure to the right. Find (a) the tension in the rope and (b) the force that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted

*asked by Anonymous on June 3, 2014* -
## algebra 2

The monthly rents for the apartments in a building are listed below. $425, $550, $550, $550, $650, $650, $650, $650, $800, $900 Part B: The apartment manager considers raising the rent for every apartment by $50. Find the mean, median, mode, range, and

*asked by jenny on May 26, 2012* -
## physics

A 3.4 kg plant hangs from the bracket shown in the figure. The bracket has a mass of 0.65 kg , and its center of mass lies 9.0 cm from the wall. A single screw holds the bracket to the wall. Find the horizontal tension force in the screw. Hint: Imagine

*asked by phoebe on December 8, 2016* -
## chemistry

Find the a)partial pressure of ethylene oxide and b)the total gas pressure, after 30 hours in a reaction vessel at 415C if the initial pressure of ethylene oxide is 782mmHg. k= 2.05x 10^-4 t(1/2)=56.3 Part A) I converted hours to seconds, and used the

*asked by mae on April 17, 2014* -
## Physics

A 58.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.55 m/s in 1.25 s. It travels with this constant speed for the next 8.00 s. The elevator then slows down (undergoes a uniform

*asked by Ronda on September 8, 2011* -
## Bus. Math

How much money should be deposited each year for 30 years at 3% to accumulate $1000,000? I find that an EXCEL spreadsheet is very helpful for these kinds of problems. If one deposits an amount P, growing for 30 years, the amount will grow to P*(1.03)^30.

*asked by julie on November 2, 2006* -
## ap chem

could you please check my work? what is the volume of one mole of solid iron at 25 degrees c? 1 mol Fe/.141 mol/cm^3 = 7.10 cm^3 (the .141 came from converting the density in to moles) is that correct? then the next step in the problem is to find the

*asked by John on January 24, 2008* -
## Astronomy

The distance between the Earth and Mars when the two panets are at opposition varies greatly because of the large eccentricity of Mar's orbit. The perihelion distance of a planet is given by rmin=a(1-e)and the aphelion distance by rmax=a(1+e) where a is

*asked by Sara on November 14, 2011* -
## math

A plane is flying due east at 600 km/h at a constant altitude. From an observation point P on the ground, the plane is sighted on a bearing of 320◦. One minute later, the bearing of the plane is 75◦ and its angle of elevation is 25◦. Show that the

*asked by Connor on July 17, 2017* -
## PHYSICS

A closed circular wire hung on a nail in awall undergoes small oscillations 2 degree & the time period 2sec.Find (a) the radius of the circular wire (b)the speed of the particle farthest away from the point of suspension as it goes through the mean

*asked by CHIKIRSHU on December 25, 2009* -
## math 157

The following data set lists the number of letters in the first 50 words in a newspaper article: 2, 5, 5, 9, 4, 4, 6, 7, 7, 6, 6, 6, 2, 5, 10, 7, 7, 6, 3, 5, 3, 2, 3, 3, 5, 4, 3, 4, 6, 5, 5, 6, 3, 2, 6, 4, 3, 5, 5, 7, 2, 3, 5, 5, 5, 7, 3, 2, 10, 3 a. Make

*asked by Deidre on June 11, 2010* -
## history

List two to three characteristics of Orientalism. How may Orientalism and prejudice contribute to hate crimes against these groups? Please post your answers and we'll be glad to critique them. This question has been asked by several others. If you put

*asked by judy on July 20, 2007* -
## Pre-calculus

An expedition walks 4 kilometers from camp on a bearing of 30 degrees, then turns and walks 10 km on a bearing of 160 degrees. Find the magnitude of the new location relative to the beginning location using vectors. -> if you can, can you possibly show how

*asked by Nicole on March 26, 2017* -
## Maths

Write the following expression into its simplest form? (1/x-1-1/xsquare-1-1/x+1-4/xsquare+1)/ xraise to 4/xsquare-1 Let's use the symbol ^ to mean "raised to the power of" when using exponents. I'll try to decipher your expression: [1/(x - 1) - 1/(x^2 - 1)

*asked by Nawaf on November 21, 2006* -
## MATH

A ball is thrown with an initial velocity of v feet per second, at an angle of θ with the horizontal (see figure in the link below). Find the vertical and horizontal components of the velocity. (Let v = 70 and θ = 40°. Round your answers to two decimal

*asked by Anonymous on March 1, 2019* -
## Physics

"Two blocks lie on a triangle as shown in the figure. Block m has a mass of 8 kg and block P has a mass of 21 kg. Assume the inclines and pulleys are frictionless find the tension in the string." The two blocks are on opposite side of an isosceles

*asked by Courtney on June 14, 2017* -
## Astronomy

Consider the same asteroid initially in the asteroid belt at a distance 3 AU from the Sun, and 2 AU from Earth, which collides with Earth. As it falls towards Earth, it acquires kinetic energy (neglect its initial motion) both by being accelerated towards

*asked by sam on December 23, 2012* -
## Math...again

Check my answers? The table below shows the scores for two teams playing a series of four card games. Game1|Game2|Game3|Gm4 Team1: -3 | 2 |-4. | 4 Team2: 4. |-5. | 9. | -9 A. Find the totals for each team after two games B.if the winner is the team with

*asked by Becki! on September 1, 2018* -
## Math

The equation h=-16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s,where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 120ft. Put in h for

*asked by Audrey on June 9, 2007* -
## please help!

I'm having trouble with this word problem. Two friends Jodi and Abe go horseback riding on the same trail in the same direction. Jodi's horse travels at 5 miles per hour while Abes horse travels at a slower pace. After 2 hours they are 2 miles apart. Find

*asked by kelly on October 5, 2012* -
## Newton's Law of Cooling

You are a forensic doctor called to a murder scene. When the victim was discovered, the body temperature was measured and found to be 20°C. You arrive one hour later and find the body temperature at that time to be 18°C. Assuming that the ambient

*asked by Helga on December 13, 2011* -
## SCIENCE

I need help. I cannot find an answer to this in my book. What would happen to a frog placed in seawater? What would happen to a sea cucumber put in fresh water? The concept here is osmosis. Bear in mind sea water is concentrated salt water. Then read the

*asked by Suzi on March 8, 2007* -
## math - please help!!

If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time

*asked by linda on November 20, 2011* -
## math

to make one costume, rachael uses 6 yards of material and 3 yards of trim. suppose she uses a total of 48 yards of material to make several costumes. how many yards of trim does she use? write the rule you used to find the number of yards of trim. Can you

*asked by jenn B on February 1, 2014* -
## Calculus

Hi. In an integration solution, the integral of (1/(sqrt (8-u squared)) is written as arcsin(u/sqrt 8), but I don't see how they got it. When I did it I got (1/8)*(arcsin(u*sqrt8)). What I did was take sqrt8 common in the denominator to get it in the form

*asked by O_o Rion on December 5, 2009* -
## Chemistry

I am trying to figure out how to calculate the reaction rate. In my question the reaction rate is: 1/2x molarity of sodium thiosulfate/reaction time Then I have to compare the rates of runs 1-3 and determine the orders of the reaction. Do I only find the

*asked by Zach on October 1, 2012* -
## statistics

From past experience it is felt that the random variable, X, the age of a mother at the birth of her first child, is normally distributed with a mean of 21.3 and a variance of 16. Find the probability that a randomly selected mother: (a) has her first

*asked by Tian on January 26, 2011* -
## data management

If rhys is late for his finite mathenetucs class, ad the probability that he is on time is 3/4. however if he is on time, he is liale to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time

*asked by sally on November 19, 2011* -
## math

If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time

*asked by sally on November 19, 2011* -
## general physics

On a banked race track, the smallest circular path on which cars can move has a radius of 119 m, while the largest has a radius of 159 m, as the drawing illustrates. The height of the outer wall is 16.8 m. Find (a) the smallest and (b) the largest speed at

*asked by tcc on July 8, 2013* -
## physcis

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 160 m, as the drawing illustrates. The height of the outer wall is 14.4 m. Find (a) the smallest and (b) the largest speed at

*asked by john on February 24, 2011* -
## Algebra

A balloon is secured to rope that is staked to the ground. A breeze blows the balloon so that the rope is taut while the balloon is directly above a flag pole that is 30 feet from where the rope is staked down. Find the altitude of the balloon if the rope

*asked by JACK on February 21, 2016* -
## math

Multiple Choice: For each of the given family incomes, find the maximum amount the family should be able to spend on a house. Family income: $61,575 a)$163,936.50 b)$153,836.50 c)$153,937.50 Family income: $54,800 a)$138,500 b)$137,000 c)$138,000

*asked by Nick on May 23, 2009* -
## Maths - Cartesian Equations

Find the corresponding Cartesian equation for each pair of parametric equations: x = t - (1/t) and y = 2*[t + (1/t)] The answer is y^2/16 - x^2/4 = 1 I have no idea where to begin. I tried squaring both equations in hope to easily remove t^2 but ended up

*asked by Jichu on December 27, 2016* -
## physics

a positive point charge q sits at the center of a hollow spherical shell. The shell, with radius R and negligible thickness, has net charge -2q. find an expression for the for the electric field strength (a) inside the sphere, rR. in what direction does

*asked by jerry on September 16, 2009* -
## physics

A 24 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90 degrees and the beam is inclined at an angle of 13.6 degrees with respect to the horizontal. What is the magnitude of

*asked by Andy on November 18, 2009* -
## Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at

*asked by Anonymous on October 14, 2015* -
## Physics

A box of mass m slides down an inclined plane that makes an angle of φ with the horizontal. If the coefficient of kinetic friction is μk, find an expression for the acceleration of the box down the slope. The acceleration due to gravity is g. a. g (

*asked by Tom on September 23, 2016* -
## math

A polling company took 5 polls in the week before and election. It showed that a mayoral candidate would get 66%, 56%, 55%, 60%, and 63% of the votes. That candidate received 64% of the total votes during the actual election. Find the percent error in the

*asked by syram on March 20, 2013* -
## Physics Mehanics

In the figure below, wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 23 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find the time needed for wheel C to reach an angular speed of 110

*asked by D on February 24, 2011* -
## Calculus

Suppose the height of an object fired straight up from the level ground is given by s(t)=300t-4.9t where s is measured in meters and t is measured in seconds. how fast is the object moving up as it leaves the ground after 2 seconds? find the average

*asked by Alice on October 10, 2017* -
## Science

I not sure what formula to use for KE or how to find the mass for the equation. Water is flowing through a 2-inch diameter pipe with a velocity of 3 ft/s. Part A What is the kinetic energy of the water in (ft)(lbf)/(lbm)? (lbf) pound force (lbm) pound mass

*asked by Angel on August 25, 2012* -
## Physics 1

A taut string connects a 5-kg crate to a 12-kg crate (see figure below). The coefficient of static friction between the smaller crate and the floor is 0.573; the coefficient of static friction between the larger crate and the floor is 0.443. Find the

*asked by Sarah on February 16, 2013* -
## PHYSICS

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at

*asked by Anonymous on October 14, 2015* -
## Constitutional Law

I have to write an essay over this topic and i need some help the question is: Discuss an example you found interesting of a right asserted by inmates under the Eighth Amendment’s Cruel and Unusual Punishment Clause and the outcome. I search the Eight

*asked by Amy on February 4, 2015* -
## math

In 2 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt moves the same quantity of cans the same distance in 6 minutes. If both belts are used, find how long it takes to move the cans

*asked by David on December 4, 2012* -
## math

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 80 people. (You may need to use the standard normal distribution table. Round your answers to the nearest

*asked by wanda on March 17, 2014* -
## math 100

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 70 people. (You may need to use the standard normal distribution table. Round your answers to the nearest

*asked by ryan on November 9, 2018* -
## chemistry

How do I find the empirical formula for aluminium selenide? You have to have some data, such as masses, or percent: Empirical means it was measured. The empirical formula for aluminium selenide is the same as it's molecular formula; Al2Se3. The empirical

*asked by Mac on January 6, 2007* -
## Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 164 m, as the drawing illustrates. The height of the outer wall is 17.4 m. Find (a) the smallest and (b) the largest speed at

*asked by Anonymous on March 20, 2012* -
## chemistry

how to find the pressure exerted by the hydrogen alone? and the volume of dry hydrogen at SATP? i have room temperature=23C room pressure =101.62kPa volume of h2 gas & H2O vapour collected =43.2ml temperature of water = 23C length of Mg ribbon = 3.00cm

*asked by Riana on January 22, 2013* -
## History

I cannot find this answer anywhere in my text. If anyone could help I would greatly appreciate it! 1. Which of the following best describes the Southern attitude toward goods and supplies at the beginning of the Civil War? a. They believed they could get

*asked by Blair on February 23, 2016* -
## Math

I have this hard question in math. can someone help me find out the riddle? I start with 1 bacteria. Every hour it doubles. How many hours until there are 1,000,000 bacteria? Can you make a function that describes this situation? What if I double it? I

*asked by Anonymous on May 16, 2014* -
## calculus

factory worker wages, according to data released by city chamber of commerce, the weekly wages of factory workers are normally distributed according to the probability density function f(x)= (1/50√2π)e^((-1/2)((x-500)/50)^2) find the probability that a

*asked by soffy on June 4, 2012* -
## Statistics

An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all

*asked by Alison on December 17, 2012* -
## physics

A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L . The string makes an angle θ with the rod. The fundamental frequency of the standing waves in the portion of the string above the rod is f.

*asked by Anonymous123 on March 17, 2018* -
## Calculus

I'm doing graphs/domain/range of basic functions. I have three questions: How do I find the domain and range of a function? (more preferably range...I'm okay but shaky on domain) Ex: f(x)=1/(x^2) Also, how do you write the domain and range with notation?

*asked by Anonymous on September 1, 2009* -
## physics

On a banked race track, the smallest circular path on which cars can move has a radius of 101 m, while the largest has a radius of 163 m, as the drawing illustrates. The height of the outer wall is 19.0 m. Find (a) the smallest and (b) the largest speed at

*asked by xavier on September 18, 2016* -
## physics

A small sphere of mass m = 7.50 g and charge q1 = 32.0 nC is attached to the end of a string and hangs vertically as shown in the figure. A second charge of equal mass and charge q2 = –58.0 nC is located a distance d = 2.00 cm below the first charge. (a)

*asked by renee on November 6, 2012* -
## PHYSICS

A weather vane initially at rest has a moment of inertia of 0.115 kg · m2 about its axis of rotation. A 44.5 g piece of clay is thrown at the vane and sticks to it at a point 10.5 cm from the axis. The initial velocity of the clay is 18.5 m/s, directed

*asked by cindy on March 14, 2012* -
## Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 112 m, while the largest has a radius of 165 m, as the drawing illustrates. The height of the outer wall is 18 m. Find (a) the smallest and (b) the largest speed at

*asked by Anonymous on October 25, 2011* -
## Math

A plane flies 430 miles at a bearing of N27°E, then turns and flies N63°E for 135 miles. Find the distance and the bearing from the starting point to the ending point ? I found distance to be 450.69 mi by using A^2+B^2=C^2 because it is a right triangle.

*asked by Nicole on April 10, 2016* -
## Physics

A ball is thrown straight up from the ground with speed v_0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the first ball was thrown upward. There is no air resistance. Find the value of H in terms

*asked by Anonymous on May 28, 2010* -
## Chemistry

Here is my question and I,m hoping I worked the problem out correctly. A 10-g mass of krypton occupies 15.0 L at a pressure of 210 kPa. Find the volume of the krypton when the pressure is increased to 790 kPa. V2 = V1 x P1/P2 V2 = 15.0 L x 210 kPa/790 kPa

*asked by Amy on May 8, 2012* -
## physics

A weather vane initially at rest has a moment of inertia of 0.119 kg · m2 about its axis of rotation. A 48.0 g piece of clay is thrown at the vane and sticks to it at a point 21.0 cm from the axis. The initial velocity of the clay is 23.0 m/s, directed

*asked by anthony on December 6, 2012* -
## Math

A colony of bacteria increases according to the law of unihabited growth. a) If the number of bacteria doubles in 5 hours, find the function that gives the number of cells in the culture. I have the answer to this one. It is N=No e ln2/5 (t) b) If there

*asked by Hannah on November 20, 2010* -
## physics

A weather vane initially at rest has a moment of inertia of 0.119 kg · m2 about its axis of rotation. A 48.0 g piece of clay is thrown at the vane and sticks to it at a point 21.0 cm from the axis. The initial velocity of the clay is 23.0 m/s, directed

*asked by Anonymous on December 6, 2012* -
## trig

An airplane has an airspeed of 450 kilometers per hour bearing Upper N45E. The wind velocity is 60 kilometers per hour in the direction Upper N30W. Find the resultant vector representing the path of the plane relative to the ground. What is the ground

*asked by Ashley on May 2, 2017* -
## Physics

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 164 m, as the drawing illustrates. The height of the outer wall is 17.4 m. Find (a) the smallest and (b) the largest speed at

*asked by Anonymous on March 20, 2012* -
## physics

A uniform 8 m 1500 kg beam is hinged to a wall and supported by a thin cable attached 2 m from the free end of the beam as shown in the figure. The beam is supported at an angle of 30 degrees above the horizontal. a) free diagram b) find the tension in the

*asked by Anonymous on June 17, 2010* -
## physics

On a banked race track, the smallest circular path on which cars can move has a radius of 105 m, while the largest has a radius of 175 m, as the drawing illustrates. The height of the outer wall is 18.7 m. Find (a) the smallest and (b) the largest speed at

*asked by ben on October 9, 2012*

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