Friday

April 18, 2014

April 18, 2014

Total # Posts: 858

**physics**

that is what i thought

**physics**

A 15.4g bullet traveling at 270 m/s is fired into a 0.488kg wooden block anchored to a 100 N/m spring. How far is the spring compressed? x_{compressed} = If the speed of the bullet is not known but it is observed that the spring is compressed 43.9 cm, what was the speed of th...

**Algebra**

Hockey teams reciever 2points when they win and 1 point when they tie. One season, a team won a championship with 64 points. They won 11 more games than they tied. How many wins and how many ties did the team have ?

**Algebra**

The formula r=2sqrt(...)5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70mph?

**Social Studies**

Identify two problems resulting from urban sprawl in the western region of the United States. If these problems are not solved, what will the outcome likely be? Pls i really need help D:

**Global Studies**

What? This is my name.. But a?

**Global Studies**

All of the following affect climate EXCEPT a. vegetation b. elevation c. location d. wind patterns <<<

**Ethical Dilemmas/Criminal Justice**

which statement about hypothetical imperatives is true?

**statistics**

From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.

**Physics**

A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J final kinetic energy ___...

**Physics**

A penny rests on top of a bowling ball. You give the bowling ball a slight bump and the penny slides off the frictionless, spherical surface as shown below. At what angle θ does the penny leave the surface of the bowling ball? (Hint: When the penny leaves the surface, the...

**math**

Five houses, next door to each other, are on the even side of the road. They are all three digit numbers and the largest is a perfect cube.The second lowest is a triangle number.

**Physics**

You are going to toss a rock straight up into the air by placing it on the palm of your hand(you are not gripping it) then pushing your hand up very rapidly. Draw a free body a diagram for the rock for each situation, and write the sum of equation based on the free body diagra...

**Global Studies (Please help)**

So you are saying its Colorado?

**Global Studies (Please help)**

What ashley?

**Global Studies (Please help)**

which of the following was neither part of the confederacy nor the union? a. Minnesota b. Texas c. Michigan D. Colorado

**Language Arts**

Which is the correct MLA citation for a magazine article? A. Brian Carson. "The Real Story Behind Bigfoot." Myths and Legends Mar. 2010:20. Print. ****** B. Carson, Brian. "The Real Story Behind Bigfoot." Myths and Legends Mar. 2010:20. Print. C. Brian Cars...

**Math**

Danny has a yard in the shape of a parallelogram: width- (50 m) length- (60 m) height- (60 m) he want to split it into 3 pieces, with more than one type of shape. they should all have equal perimeter. the perimeter can not be in decimals. (Help please)

**Business Math **

. Compute the rate for the following loan. Round your answer to the nearest tenth of a percent. Principal Rate (%) Time Interest $50,000 9 months $4,500 (Points : 2)

**Physics**

A small block slides along a track from one level to a higher level, by moving through an intermediate valley (see Figure). The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. Assume that the block's...

**Physics**

Place a small rubber ball on top of a basketball or soccer ball and then drop them together. If vertical alignment nicely remains as they fall to the floor, you’ll see that the small ball bounces unusually high. Can you reconcile this with energy conservation?

**Astronomy**

Do you do anything on your own??

**physics**

A 1600 kg car moves along a horizontal road at speed v0 = 13.3 m/s. The road is wet, so the static friction coefficient between the tires and the road is only μs = 0.21 and the kinetic friction coefficient is even lower, μk = 0.147. The acceleration of gravity is 9.8...

**Physics Classical Mechanics**

MIT x Problem cheater

**Physics Classical Mechanics**

this is an MIT EDX problem cheater

**Computer**

Suppose that you are the general manager for a major-league baseball team. During the off-season, you need to sign some free-agent players for your team. The team owner has given you a budget of $X to spend on free agents. You are allowed to spend less than $X altogether, but ...

**Physics (angular motion)**

The blades of a fan running at low speed turn at 230rpm . When the fan is switched to high speed, the rotation rate increases uniformly to 370rpm in 5.80s . Part A What is the magnitude of the angular acceleration of the blades? Part B How many revolutions do the blades go thr...

**7th grade Math**

use n to stand for the number of payments and a for the amount still owed. write an equation for calculating a for any value of n

**Algebra**

1000(h) = 917(20+h) solve for h :/

**geomerty**

what form of symmetry does a equilateral triangle and a round button have?

**Physics**

If the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h? I tried using FB=FG but I don't get anywhere. Can anyone help me out?

**Physics**

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N? What is the Gravitational force...

**Physics**

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N? What is the Gravitational force...

**Physics**

But do I have to include He density in this equation at all?

**Physics**

A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N?

**Physics/Electricity**

An aluminum wire carrying a current of 9.0 A has a cross-sectional area of 7.0X10^-6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)

**Math**

Would that be 50/100?

**Math**

if the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h, below the surface? I have absolutely no idea where to even start.

**Physics**

A metal sphere is found floating in a pool. The sphere is 1m in diameter. If it is half submerged determine the weight of the sphere. You may assume the following: g=10N/kg density of Water = 1000kg/m^3 Vsphere = 4/3pir^3 I get 13.3 as my final answer, but there is no answer i...

**Psychology**

Aren't the variables the same though?

**Psychology**

So, the type of life skill program is the independent variable of this scenario? Can you please explain more as to why? The dependent variable is assessing the effectiveness of the new life skills program in promoting problem solving skills.

**Psychology**

Continuing... Group A gets the life skills training for 2 days. Group B meet at the same time and they plan their own activities. Group C takes part in the prison program. At the end of 12 weeks, all three groups are assessed on their ability to solve personal and interpersona...

**Psychology**

What is the independent variable in this scenario: A research Psychologist is working in a federal prison and is asked to asses this new program. From 70 inmate volunteers, the psychologist randomly assigns 45 inmate volunteers to three groups: group A, group B, and group C.

**Geometry**

A cylindrical hockey puck is 1in high and 3in in diameter. What is its volume in cubic inches?

**Geometry**

Find the area of a regular pentagon with radius 5in.

**Geometry**

The length of each side of a rhombus is 16. The longer diagonal has length 26. Find the measures of the angles of the rhombus to the nearset degree.

**Geometry**

The altitude to the hypotenuse of a right triangle ABC divides the hypotenuse into 12mm and 16mm segments. Find the lengths of each of the following. A. The altitude to the hypotenuse B. The shorter leg of angle ABC C. The longer leg of angle ABC

**Geometry**

Find the area of each equilateral triangle. The triangle has 12cm sides. The triangle has 10in altitudes.

**Geometry**

The circumference of the ball of string is 415ft and it weighs 13,0000Ib. Which is the best approximation of the volume of the ball of string? F.300FT^3 G.600FT^3 H.1200FT^3 I.2400FT^3

**Geometry**

The circumference of the ball of string is 415ft and it weighs 13,0000Ib. what is the radius of the ball of string to the nearest tenth of a foot? A. 3.3 B. 6.6 C. 13.2 D. 20.75

**Geometry**

Find the missing length. MG=10cm, NP=4cm, QP= 14cm, MN=____cm

**Geometry**

The volume of two similar rectangular prisms are 64cm^3 and 1000cm^3. The surface area of the smaller figure is 112cm^2. What is the surface area in square centimeters of the larger figure?

**Geometry**

A lawn chair weighs 8Ib. A child's lawn chair has dimensions exactly one half those of the larger chair. How many pounds does the child's chair weigh?

**Geometry**

The slan heights of two similar pyramids are in the ratio 1:5. The volume of the smaller pyramid is 60m^3. What is the volume in cubic meters of the larger pyramid?

**Geometry**

Two similar pyramids have laterl area 8ft^2 and 18ft^2. The volume of the smaller pyramid is 32ft^3. Find the volume of the larger pyramid.

**Geometry**

A regular pentagonal solid prism has 9cm base edges. A larger, similar solid prism of the same material has 36cm base edges. How does each indicated measurement for the larger prism compare to the same measurement for the smaller prism? Find the volume and weight.

**Geometry**

Which is the best approximation of the volume of the ball of string? A. 300ft^3 B. 600ft^3 C. 1,200ft^3 D. 2,400ft^3

**Geometry**

what is the radius of the ball of string to the nearest tenth of a foot? A. 3.3 B. 6.6 C. 13.2 D. 20.75

**Geometry**

find the radius of a sphere withh the given property. A.The number of square meters of a surface area equals the number of cubic meters of volume. B. The ratio of surface area in square meters to volume in cubic meters is 1:5.

**Geometry**

The density of steel is about 0.28Ib/in^3. could you lift a solid steel ball with radius 4in? whith radius 6in? explain

**Geometry**

Give the dimensions of a cylinder and a sphere that have the same volume.

**Geometry**

On September 3, 1970 a hailstone with diameter 5.6in fell at Coffeyville, Kansas. It weighed about 0.018Ib/in^3 compared to the normal 0.033Ib/in^3 for ice. About how heavy was this Kansas hailstone?

**Geometry**

tell whether each of the following points is inside, outside, or on the sphere. A(o, -3,4)B(-1,-1)C(4,-6,-10).

**Geometry**

use pie(3.14) to estimate the surface area and volume of a sphere with radius 3cm.

**Geometry**

A 5 foot tall woman stands 15ft from a statue. She must look up at an angle of 60 degrees to see the top of the statue. How tall is the statue?

**Geometry**

find the area of a hexagon with radius 6.2m.

**Geometry**

find the area of a regular pentagon with radius 5in

**Geometry**

find the volume of a triangular prisim with a=2.3, c=2 and h=1.5

**Geometry**

what shape does a semi circle form when rotated?

**Geometry**

what shape does a square form when rotated?

**Geometry**

what is the volume of a cylinder with a radius of 1.2 and height of 5.3cm

**Geometry**

A plane flying 16 degrees west of north at 289mph is flying in air which is moving 32mph at due west. Find the resulting speed and direction of the plane. (Step by step please!)

**Geometry**

A regular hexagon with radius 6.2m.

**Geometry**

A regular pentagon with radius 5inches.

**Geometry**

Explain why sinx degrees= cos(90-x)degrees. include a diagram with your explanation.

**Geometry**

A surveyor measuring the tallest tree in a park is 100ft from the tree. His angle-measuring device is 5 ft above the ground. The angle of elevation to the top of the tree is 48°. How tall is the tree?

**Geometry**

A family vacationed at a beach 120 mi east and 30 mi south of their home. Find the distance and the direction from their home to the beach.

**Geometry**

Twenty minutes after being launched, a hot-air balloon has risen to an altitude of 300 m. The pilot can still see the starting point on the ground at a 25° angle of depression. How many meters is the balloon from the starting point?

**Geometry**

A 5 foot tall woman stands 15 ft from a statue. She must look up at an angle of 60° to see the top of the statue. How tall is the statue?

**Language and Other Barriers**

Thanks guys

**Language and Other Barriers**

9. To be a teacher aide in an ESL classroom, you should A. have an ear for language. B. receive certification in ESL instruction, if possible. C. speak at least one other language besides English. D. have prior teacher aide experience in a â€œregularâ...

**Chemistry**

I was asked this question for homework but I don't even know where to begin. It has 3 parts to answer. 1) add all lone pairs and make multiple bonds with the framework shown to satisfy the octets and make the best Lewis structure. 2) For the C-N bond(s) in each molecule in...

**chemisrty **

565 g block of aluminum metal is cooled from 243 c to 100 c is what?

**Chemistry**

I am also having issues for this structure as well. [CH*subscript3*CH*subscript2*C(CH*subscript3*)CH(CH*subscript3*)CHCH*suscript2*]+ it reads from left to right like this: [CH3CH2C(CH3)CH(CH3)CHCH2]+

**Chemistry**

I am having issues drawing the lewis structure for this...can anyone explain? CHCCH*subscript2*CH0

**Math**

Can someone check my work? the problem is: x=2+3/y and I have to solve for y I get rid of the denominator y and multiply it with X...so it looks like xy=5 then just divide by x on both sides for a final answer of y=5/x

**Algebra**

I am completely lost...please anyone can anyone help? x = 2+y x and 2 are in inches then it says solution y=x(in) - a(in)

**math**

If we use binets formula for the fibonacci numbers we can trivially see that Fp=5^(p-1)/2 mod p implying that the only prime p such that p divides Fp is 5 divides F5=5.

**math**

how do I set up this problem. John has bag of candy, gives 1/2 to his brother and 1/3 of remaining to his sister and has 15 left? how many did he start with?

**statistics**

Sunday? It's Monday.

**statistics**

Sunday? It's Monday.

**statistics**

Sunday? It's Monday.

**statistics**

Difference being, I've finished. Without help. Unlike you.

**statistics**

Even more ridiculous that you are asking for answers for a test.

**mechanics**

Find the total kinetic energy of a 1500 g wheel, 700 mm in diameter, rolling across a level surface at 650 rpm. Assume that the wheel can be considered as a hoop. (b) For the wheel in part (a), calculate the torque required to decrease its rotational speed from 400 rpm to rest...

**programming**

Write a program reads the city names and respective gas prices into 2 single-subscripted arrays in your program - one of type string, the other of type double. (We would call these "parallel arrays" - each corresponding location shows the city name and gas price for ...

**Chemistry**

what is the rate of a first-order reaction that has a reactant concentration of 1.1M and a rate constant of 0.14/s?

**Math**

A jar contains 1 blue crayon, 1 green crayon, 1 black crayon, and 1 red crayon. You grab 1 crayon without looking. Find the sample space for this experiment.

**Chemistry**

Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for example, 0.9 pH for "...

**Public Speaking**

C for both questions

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