# Kristy

Most popular questions and responses by Kristy-
## physics

You testify as an expert witness in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill (see the figure). You find that the slope of the hill is θ = 14.0°, that the

*asked on October 9, 2013* -
## algebra 2

if the equation for the regression line for the data set (3,6), (6,2), (9,10) is y=2/3x+2, what is the sse for the data set? A. 16 B. 10 C. 4 D. 24

*asked on December 22, 2016* -
## economics

. Predicting Consequences Use the table below to predict what would happen if airlines and baseball stadiums priced all seats the same instead of using variable pricing. What would happen to the number of tickets sold? What would happen to the total

*asked on February 23, 2017* -
## chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine

*asked on November 10, 2010* -
## math

Heather is solving an equation by graphing the expressions on both sides. If her graph intersects at an infinite number of points, which statement could describe the equation Heather is attempting to solve? A. One side of the equation is a constant, and

*asked on January 12, 2016* -
## physical science B

I have to build a roller coaster with 3 hills. Hill A is 15 inches high,it drops down to 3 inches, rises to 8 inches, drops again to 5 inches and rises a last time to 3 inches before dropping off. My question is when using a tennis ball as the car.. 1.

*asked on February 27, 2017* -
## Algebra II

The volume of a gas in cubic centimeters, V, varies inversely with the pressure of the gas in liters per square centimeter, p. When the volume of the gas is 16 cm3, its pressure is 20 L/cm2. Find the volume of the gas when the pressure is 2.2 L/cm2.

*asked on December 15, 2016* -
## Science

Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Describe your scale below. So I don't understand this part:

*asked on December 16, 2018* -
## physics

A 68 kg man is ice-skating due north with a velocity of 5.6 m/s when he collides with a 42 kg child. The man and child stay together and have a velocity of 3.0 m/s at an angle of 35° north of due east immediately after the collision. What are (a) the

*asked on November 13, 2013* -
## algebra 2

according to the graph of h(w) (5.0,20.00) below, what happens when w gets very large?

*asked on December 19, 2016* -
## algebra 2

the soccer club has planned a trip to a tournament. the cost of the van is $231 when 3 students who are not members of the club join the trip, the transportation cost per person drops by $4.50 how many soccer members are going to the tournament?

*asked on December 19, 2016* -
## physics

In the figure, two skaters, each of mass 58.0 kg, approach each other along parallel paths separated by 2.79 m. They have opposite velocities of 1.50 m/s each. One skater carries one end of a long pole of negligible mass, and the other skater grabs the

*asked on December 5, 2013* -
## algebra 2

Danielle needs to walk 2.5 miles. If she wants to reach her destination in 30 minutes ( hour), how fast does she need to walk?

*asked on December 15, 2016* -
## physics

In 1939 or 1940, Emanuel Zacchini took his human-cannonball act to an extreme: After being shot from a cannon, he soared over three Ferris wheels and into a net (see the figure). Assume that he is launched with a speed of 28 m/s and at an angle of 56°.

*asked on September 19, 2013* -
## OChem

Anhydrous conditions are vital for a successful Grignard synthesis. To demonstrate this point calculate the mass of the water it would take to destroy the phenylmagnesium bromide you will synthesize. What is he volume of this amount of water? -How exactly

*asked on March 2, 2009* -
## physics

A skateboard with mass M rolls down a ramp, starting from rest. It takes time T to roll a distance L along the ramp. In terms of M, T, and L, what is the skateboard’s acceleration down the ramp?

*asked on March 18, 2014* -
## business law

Ruth carelessly parks her car on a steep hill, leaving the car in neutral and failing to engage the parking brake. The car roles down the hill, knocking down an electric line. The sparks from the broken line ignites a grass fire. The fire spreads until it

*asked on July 6, 2010* -
## physics

As a contrast between the old and the modern and between the large and the small, consider the following: In old rural England 1 hide (110 acres) was the area of land needed to sustain one family with a single plough for one year. (An area of 1 acre is

*asked on September 5, 2013* -
## physical science

To what Celsius temperature must a gas sample initially at 20 degrees Celsius be heated if its volume is to double while the pressure remains the same?

*asked on May 7, 2012* -
## Chemistry

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine

*asked on November 10, 2010* -
## chemistry

How many grams of H2 are needed to produce 10.75g of NH3?

*asked on October 14, 2013* -
## chemistry

how many drops of 0.5M NaOH are needed to neutralize 10 drops of 1.0M HCl? What would be the pH of the neutral solution?

*asked on May 2, 2010* -
## physics

Suppose that a shot putter can put a shot at the worldclass speed v0 = 14.00 m/s and at a height of 2.160 m. What horizontal distance would the shot travel if the launch angle θ0 is (a) 45.00° and (b) 42.00°? The answers indicate that the angle of 45°,

*asked on September 19, 2013* -
## physics

A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?

*asked on September 12, 2013* -
## investing

You have a $ 2 million portfolio consisting of $100,000 investment in each of 20 different stocks. The portfolio has a beta of 1.1. You are considering selling $100,000 worth one stock with a beta of 0.9 and using the proceeds to purchase another stock

*asked on May 4, 2011* -
## algebra 2

An object's height varies directly with the length of its shadow. A person who is 5 feet tall casts an 8-foot shadow. How long is the shadow of a 20-foot tree?

*asked on December 15, 2016* -
## chemysteryyy!!!!

Rubbing Alchol often contains propanol, C3H7OH. Suppose that you have an 85.9g sample of propanol. a) Howmany carbon atoms are in the sample? b) Howmany hydrogen atoms are in the sample? C)Howmany oxygen atoms are in the sample? PLEASE!! explain the steps

*asked on December 26, 2012* -
## physics

Three astronauts, propelled by jet backpacks, push and guide a 131 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 36 N, F2 = 58 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle

*asked on October 2, 2013* -
## physics

A lowly high diver pushes off horizontally with a speed of 2.75 m/s from the edge of a platform that is 10.0 m above the surface of the water. (a) At what horizontal distance from the edge of the platform is the diver 0.866 s after pushing off? (b) At what

*asked on September 18, 2013* -
## Physics

A(n) 160 g block is pushed by an external force against a spring with spring constant of 1260 N/m until the spring is compressed by 11.8 cm from its uncompressed length. The compressed spring and block rests at the bottom of an incline of angle θ =

*asked on October 25, 2014* -
## chem

Consider the combustion of propane (C3H8) in the presence of oxygen: C3H8+5O2 => 3CO2+4H2O How many grams of O2 are required to react completely with 3 moles of propane?

*asked on November 11, 2010* -
## physics

A rock is shot vertically upward from the edge of the top of a tall building.The rock reaches its maximum height above the top of the building 1.90 s after being shot. Then, after barely missing the edge of the building as it falls downward, the rock

*asked on September 12, 2013* -
## phyiscs

A bolt is dropped from a bridge under construction, falling 81 m to the valley below the bridge. (a) How much time does it take to pass through the last 28 % of its fall? What is its speed (b) when it begins that last 28 % of its fall and (c) just before

*asked on September 12, 2013* -
## chemisry

Calculate the density in g/mL {\rm g}/{\rm mL} of 2.0L {\rm L} of gasoline that weighs 1.29kg kg . Express your answer to two significant figures and include the appropriate units

*asked on September 5, 2013* -
## astronomy

If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters.

*asked on January 16, 2013* -
## algebra

A truck leaves a depot at 11 A.M. and travels at a speed of 54 mph. At noon, a van leaves the same place and travels the same route at a speed of 64 mph. At what time does the van overtake the truck?

*asked on February 14, 2017* -
## chemistry

An atom has a valence shell configuration of ns2p5. To which group of elements in the periodic table does it belong? transition metals Halogens alkaline earth metals alkaline metal

*asked on December 1, 2010* -
## Physics

How long will it take a 1830 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?

*asked on November 10, 2011* -
## math

If a 54 pound boy falls off the top of the grand canyon which is 5996 feet deep, how many seconds will it take for him to hit the bottom?

*asked on March 29, 2019* -
## physics

In Figure (1), a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.13 kg) and embeds itself in block 2 (mass 1.75 kg). The blocks end up with speeds v1 = 0.600 m/s and v2 = 1.32 m/s

*asked on November 13, 2013* -
## chemistry

What mass of oxygen is needed for the complete combustion of 5.00×10−3g of methane?

*asked on October 14, 2013* -
## physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 82.6 N on the wall to which it is attached. The tensions in the shorter cords are T1 =

*asked on October 3, 2013* -
## physics

A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?

*asked on September 12, 2013* -
## Chemistry

Write the balanced equation for the double replacement reaction of: Barium chloride and Sulfuric acid

*asked on March 10, 2012* -
## Calculus

At noon, ship A is 180 km west of ship B. Ship A is sailing east at 40 km/h and ship B is sailing north at 30 km/h. How fast is the distance between the ships changing at 4:00 PM?

*asked on November 30, 2011* -
## math HELP

A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour and sugar in each batch of cookies. what is the number of batches the baker could have made with his flour and sugar? this is

*asked on October 11, 2010* -
## chemistry

Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased

*asked on May 23, 2007* -
## astronomy

a remote internet webpage may sometimes reach your computer by going through a geostationary satellite orbiting approx. 3.6x10^7m above earths surface. What is the minimum delay in seconds that the webpage takes to reach your computer.

*asked on January 16, 2013* -
## physics

A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far

*asked on September 19, 2013* -
## physics

At one instant a bicyclist is 58.0 m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then 35.0 s later, the cyclist is 58.0 m due north of the flagpole, going due east with a speed of 13.0 m/s. For the cyclist in this 35.0 s

*asked on September 17, 2013* -
## English....Writeacher checkthis out!

I DID IT!:) The Tainted Mirror In Shakespeare’s great tragedy Hamlet, three characters Hamlet, Laertes and Fortinbras, develop as “foils,” or contrasting characters. Several comparisons and contrasts can be shown between the three characters, many of

*asked on January 3, 2013* -
## physics

In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.8 m and then collides with stationary block 2, which has mass m2 = 2m1. After the collision, block 2 slides into a region where the coefficient of kinetic

*asked on November 13, 2013* -
## Physics

I NEED HELP! Already answered on here but does not make sense/work. Please HELP! A 2.7 kg balloon is filled with helium ( density = 0.179 kg/m^3). If the balloon is a sphere with a radius of 5.2m , what is the maximum weight it can lift?

*asked on December 1, 2010* -
## Math

A truck is carrying orange juice cherry juice and cranberry juice bottles in a ratio of 1:2:5. If there are 30 cherry juice bottles, then how many cranberry juice bottles are there?

*asked on February 22, 2016* -
## Chemistry

What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? HNO3 + Ca(OH)2 -->Ca(NO3)2 + H2O What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? H2SO4 +

*asked on March 24, 2012* -
## college chemistry

We did not find any results for 'An automobile gasoline tank holds 23.0 gal when full. How manypounds of gasoline willit hold if the gasoline has a density of 0.737 g/ml?

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

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.31 m. It rebounds to a height of 2.51 m. If the ball is in contact with the floor for 12.6 ms, what is its average acceleration during that contact?

*asked on September 12, 2013* -
## Chemistry. Please Check!

What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? HNO3 + Ca(OH)2 -->Ca(NO3)2 + H2O What would the coefficient be for the produced salt in a balanced chemical equation of this acid and base? H2SO4 +

*asked on March 24, 2012* -
## Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

*asked on November 14, 2010* -
## Chemistry

How many pi bonds and sigma bonds are in ritalin molecule? I counted 4 pi bonds and 18 sigma bonds is that correct? I know double bonds are pi bonds and single bonds are pi bonds

*asked on November 11, 2010* -
## To be or not to be speech

What literary devices are used in "To be or not to be that is the question" from Hamlet? I have to analyze the speech and I would like to know if my interpretation is correct. Hamlet is talking to himself and he is debating whether he wants to live or not

*asked on January 11, 2008* -
## Math

What is the unit rate? A racing car travels 180 miles in 1.5 hours. 5 i need it as a fraction like: 180mi/1.5 hrs thats not the unit rate i think it is The units here will be miles per hour. (Another valid yet rare answer is hours per mile.)

*asked on January 25, 2007* -
## astronomy

if the earths orbit is 1.5x10^8km, determine how fast earth moves along its orbit assume there are 365 days in a year. remember the circumference of a circle is equal to 2pi where r is the radius.

*asked on January 16, 2013* -
## trig

A passenger airplane flying at an altitude of 1.8 km starts its final airport approach by descending at an angle of depression of 6°. How far along the ground is the airplane from its landing point

*asked on March 29, 2011* -
## Physics

I'm so confused on how to find mu. A 68 kg box slides down a 27 degree ramp with an acceleration of 3.10 m/s squared. The acceleration due to gravity is 9.81 m/s squared. It wants me to find mu between the box and the ramp but I don't even know where to

*asked on October 10, 2010* -
## math

what do we call the numbers that cannot be arranged into 2-row arrays? I think this is the 3rd time I've seen this question posed. I'm not aware of any special name for arrays with two rows, so I'd sure be interested to see what the quesioner has in mind

*asked on August 30, 2006* -
## physics

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 1.46 kg·m2 about its central axis, is set spinning

*asked on December 8, 2013* -
## Music

How did music in the sixties represent/reflect the political and social climate? 3 ways.

*asked on April 21, 2013* -
## teacher aide

Need help! If you're preparing a bulletin board, how many ideas should you try to get across at one time? A One B Two C Four D As many as possible I think A one, but I can't seem to find it anywhere. Can someone plz help.

*asked on April 26, 2011* -
## trig

Given a right triangle with legs 8 and 5, find the measure of the two acute angles. (Round to the nearest hundredth

*asked on March 29, 2011* -
## Art

If you wish to balance complementary colors so that they'll appear static and harmonious, it's important to ? http://www.applepainter.com/Chap05/ and http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm These two sites should help you

*asked on May 25, 2007* -
## physics

A lead ball is dropped in a lake from a diving board 5.89 m above the water. It hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. It reaches the bottom 4.29 s after it is dropped. (a) How deep is the lake?

*asked on September 12, 2013* -
## PHYSICS

A lead ball is dropped in a lake from a diving board 5.89 m above the water. It hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. It reaches the bottom 4.29 s after it is dropped. (a) How deep is the lake?

*asked on September 12, 2013* -
## CHEMISRTY

How many liters of H2O will form when excess O2 reacts with 100 liters of H2 according to the gas phase reaction:

*asked on May 3, 2013* -
## Physics

Identical points on two harmonic waves with the same wavelength (0.65 meters) and frequency are the separated by a distance of 0.15 meters. What is the phase difference between the waves?

*asked on January 27, 2013* -
## English

Hamlet Take Home Test - Response Essay Answer ONE of the following questions in 750-850 word response: 1) The hero in a Shakespearean play always contributes in some way to the disaster in which he perishes. How true is this in Hamlet? 2) Discuss the use

*asked on January 2, 2013* -
## Human Anatomy

(Part 2) Include the steps involved in transmitting the impulse “microscopically” through an individual neuron, from one neuron to another, and then from the neuron to the muscle fiber. (Part 3) Include in this the steps involved in the actual muscle

*asked on March 4, 2011* -
## Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

*asked on November 14, 2010* -
## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

*asked on November 14, 2010* -
## Math

Solve for P: A = P + nrP

*asked on January 31, 2010* -
## Chemistry

Sorry, just asking a question on chemistry.

*asked on January 5, 2009* -
## PLEASE HELP!!1

Does $1000 at a rate of growth of 12% compounded continuously grow more slowly than $120,000 at a rate of growth of 12% compounded continuously?

*asked on November 3, 2008* -
## literature/ GUM

Which word is the antecedent of the underlined pronoun? The boy took his time filling out the form and then checked it for spelling errors. A. form B. boy C. errors D. time

*asked on January 11, 2016* -
## Chemistry

The values on the label of a bottle of nitric acid are specific gravity 1.42 and assay 60%. Use these values to determine the molarity of the solution. Show your work.

*asked on February 28, 2014* -
## physics

A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7.8 rad/s; 60 radians later, its angular speed is 19 rad/s. Calculate (a) the angular acceleration (rad/s2), (b) the

*asked on November 13, 2013* -
## physics

A rifle that shoots bullets at 404 m/s is to be aimed at a target 49.7 m away. If the center of the target is level with the rifle, how high (in cm) above the target must the rifle barrel be pointed so that the bullet hits dead center?

*asked on September 18, 2013* -
## physics

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.31 m. It rebounds to a height of 2.51 m. If the ball is in contact with the floor for 12.6 ms, what is its average acceleration during that contact?

*asked on September 12, 2013* -
## physics

A startled armadillo leaps upward, rising 0.521 m in the first 0.204 s. (a) What is its initial speed as it leaves the ground? (b) What is its speed at the height of 0.521 m? (c) How much higher does it go?

*asked on September 12, 2013* -
## physics

A stone is dropped into a river from a bridge 45.4 m above the water. Another stone is thrown vertically down 1.14 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?

*asked on September 12, 2013* -
## Math

Mike had some pieces of wood to build a doghouse. He cut each piece in fourths. Then he had 24 pieces of wood. How many whole pieces of wood did Mike have to start with?

*asked on April 5, 2013* -
## math

Identify the initial value and growth or decay factor in each of the following exponential functions: a) y= 350 x 5^x b) Q= 25000 x (1/2)^t c) P=(7 x 10^3) x 4^t d) N= 5000 x (9/10)^t

*asked on April 2, 2013* -
## Hamlet...essay - Writeteacher

Kristy Cheung Ms.Weately Grade 11 U English January 10, 2013 Title A person who sets off another person by being a contrast to that person is known as a foil to the character. In Shakespeare’s great tragedy Hamlet, two character Laertes and Fortinbras,

*asked on January 4, 2013* -
## math

The height h(in ft) above the ground of a submarine-launches missile is given by the function h=-16t+96t+80 where t represents the time in seconds. Scetch a graph of this function. Determine the time at which the missile leaves and returns to the water.

*asked on November 27, 2012* -
## geography

what are the 5 largest rivers in middle and central america and their relative location.

*asked on October 30, 2012* -
## MATH

how can you tell the fraction and the angle measure of rotational symmetry in an octogon. i need the smallest turn that matches the original figure hope i made sense!!!

*asked on February 23, 2011* -
## 7th grade Algebra

A set of whole numbers contains 1, 3, 4, 5, 6, 11, and X. The mean and median of the set are the same, and the mean is equal to one of the six known numbers above. What is the value of X?

*asked on November 21, 2010* -
## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

*asked on November 14, 2010* -
## Chemistry

How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

*asked on November 14, 2010* -
## Physics-potential energy

In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.0529·10−9m when it is in the n=1 state. What is its electric potential energy?

*asked on November 3, 2010* -
## Math

A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour and sugar in each batch of cookie. what is the number of batches the baker could have made with his flour and sugar

*asked on October 11, 2010*

## Pages

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