Friday
August 1, 2014

Posts by Kelsey


Total # Posts: 540

Physics
planet orbits a star once every 2.84 10^7 s in a nearly circular orbit of radius 1.42 10^11 m. (a) With respect to the star, determine the angular speed of the planet. (b) With respect to the star, determine the tangential speed of the planet. (c) With respect to the star, det...

math
3 feet in a yard 12 inches in a foot. 12x3x10=360 360/10=36 tiles

geometry
3 feet in a yard 12 inches in a foot. 12x3x10=360 360/10=36 tiles

Algebra
-9+3x=??? if you still need help let me know

Algebra
4-12x=??

algebra
-21+3x

algebra
27-2x

algerbra
ride=.40+.15x

Physics
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 27.3° above the horizontal. One child, with a mass of 40.8 kg, is hanging 1.24 m along the branch from the tree trunk. The other child, with...

SOCIAL STUDIES
Harvard?

Science
A is wrong because they could have more or less children. C is wrong because it is impossible to have an aa child with the genotypes of the parents. And D is wrong because A is wrong. If you draw out the punett square you would see that B is correct

Physics
Disregard. I figured it out

Physics
The shaft of a pump starts from rest and has an angular acceleration of 3.40 rad/s2 for 11.0 s. (a) At the end of this interval, what is the shaft's angular speed? rad/s (b) What is the angle through which the shaft has turned

physics
A 220 N crate is pushed along the ground with a horizontal force. The coefficient of kinetic friction is 0.21 and the coefficient of static friction is 0.31. The crate moves at a constant speed of 4.1 m/s. a) Draw a free-body diagram for the crate. b) What is the size of the p...

math
13

Algebra
a^2+b^2=C^2 x^2+(x+1)^2=5^2 the other legs are 3ft and 4ft

Algebra 1 (HELP PLEASE!!)
5/3 x 3= 15/3 or 5 cups

8th grade math
it takes 5 minutes to make 2 cuts to give you 3 pieces. so if you continue at a rate of two cuts per 5 minute and in order to get 9 pieces you need 8 cuts. so I think 20 minutes

Algebra 1
Kim weighed 6.5lbs which is the same as 2/3t+3. so 6.5=3+2/3t 3.5=2/3t t=5.25

science
chloride is a form of chlorine

science
both

physics
I figured it out. the velocity of the recoil is in the negative direction.

physics
no that is not a problem. I just have to put in the number. the label is provided.

physics
The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.012 kg, and its velocity is +715 m/s. Her mass (including the gu...

physics
Thanks. I was messing up the change in velocity part

physics
a baseball (m = 153 g) approaches a bat horizontally at a speed of 41.0 m/s (92 mi/h) and is hit straight back at a speed of 45.8 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by the bat? Neglect the...

math
bayside=5 lincoln x+1 hendricks=x band 20=5+x+x+1 20=2x+6 14=2x 7=x so hendricks has 7 and lincoln has 8

Health, Safety, and Nutrition
There are 9 calories in a gram of fat. 9x9=81 calories. 81/115=70.4%. C is the correct answer

math algerba
½(y-2)+2 =3/8(3y-4) Is 4 a solution?

algebra 2
49=x+(x+9)+(x+4) 49=3x+13 36=3x 12+x so one side is 12cm, on is 16cm and one is 21cm

physics
force=G(m1m2/r^2) G=6.673x10^-11

Science
work=force*distance work=800N*100m

Math
draw out the picture of the trapezoid. Since it is a regular trapezoid the bottom angles on both sides are the same. If you draw imaginary lines from the top to the bottom you can form a figure composed of two triangles and 1 square in the middle. You can then use some right t...

Math
a=P(1+(r/n))^nt

Math
semiannual means twice a year. so 2*5=10

Algebra 1
yes

Basic math
median is the middle number. so put the numbers in descending or ascending order and find the middle number. It would be 1,700

SCIENCE
They are "renewable" resources, and less polluting

physics
disregard. I figured it out

physics
A projectile of mass 0.550 kg is shot straight up with an initial speed of 22.0 m/s. (a) How high would it go if there were no air friction? I get 24.7m for this. (b)If the projectile rises to a maximum height of only 13.6 m, determine the magnitude of the average force due to...

Math
Yes you would multiply this. And assuming the tank is empty that is the correct answer

physical science
mechanical energy is the sum of kinetic and potential energy. there fore the one who says that there is mechanical energy is correct. Because there is potential energy present

math
a=Pe^rt a=25000e^(.0575)(7.5)

math (calculus)
A rectangular sheet of paper of width a and length b, where 0<a<b, is folded by taking one corner of the sheet and placing it at point P on the opposite long side of the sheet. The fold is flatened to form a crease across the sheet. Assuming that the fold is made that th...

PHYSICS
An object is originally moving at 13 m/s at the top of a frictionless, quarter-circular ramp with a radius of R = 13 meters. It then travels on a frictionless horizontal surface, around a frictionless loop of radius r = 2 meters, across another horizontal, frictionless surface...

PHYSICS
An object is thrown straight upwards from the ground at 28 m/s. Due to air resistance (a non-conservative force), the object loses 31.4 percent of its initial energy during its trip to reach maximum height. How much higher does the object travel if there was no air resistance?...

Physics
A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 55.0 kg, and the hill is inclined at 16.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at ...

Probability
0.062

Spelling Skills
Use the spelling words in the boxes below to complete the story. Then use proofreading marks to correct mistakes in the use of capital letters and periods.

calculus
A trough is 12 feet long and 3 feet across at the top. It ends are isosceles triangles with a height of 3 feet. If water is being pumped into the trough at 2.5 cubic feet per minute, how fast is the water level rising when the water is 1 foot deep?

Chemistry
How many grams of formaldehyde, H2CO, are in 500 ml of a 40% solution of formaldehyde in water? (Assume for this problem that the density of the formalin solution is 0.98 g/ml)

chemistry
How many grams of sodium were isolated from the decomposition of 0.0292 moles of Na2O, if the reaction occurred with a 44.9% percent yeild? 2 Na2O(s) --> 4 Na(s) + O2(g)

chemistry
How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?

chemistry
How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?

Physics
An object is in free fall. At one instant, it is traveling at 41 m/s. Exactly 3.2 s later, what is its speed? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s

Science
Hi, I am needing help with the following question. How long would it take to produce 150 kW with 780 J of energy? (make sure you have the corerct units)

programming
How do i read in a vector of integers with a space inbetween (i.e. 0 1 2 3) and make it an integer array? in java

Physics
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck?

Spanish-8th gradePlease check
1.¿Tienes que hacer mucha tarea hoy? Sí, tengo que hacer mucha tarea hoy. 2.¿Cómo vas al parque? Voy a pie. 3.¿Dónde está la cocina en tu casa? En mi casa, la cocina está abajo. 4.¿Prefieres lavar la ropa o quitar ...

Physics
Kathy is changing the tire of her car on a steep hill 20 m high. She trips and drops the 10 kg spare tire which rolls down the hill. What is the speed of the tire at the top of the next hill if the height of the hill is 5 m high?

Physics
A player kicks a footbal with a velocity of 27 m/s at an angle of 31° with the ground. How high does the ball travel?

Chemistry
When a sodium atom absorbs light at 330.2 nm, the 3s electron is promoted to the 4p level. How much energy would be required for ionization once the electron is in the 4p level?

Chemistry
When a sodium atom absorbs light at 330.2 nm, the 3s electron is promoted to the 4p level. How much energy would be required for ionization once the electron is in the 4p level?

chemistry
Thanks, How many atoms are in a body-centered cubic unit cell??? a- one b- two c- four d- six e- eight

Chem
How many grams of O2 are required to burn13.0g of acetylene? The answer I got is 40gO2 is this right.

chem.
How many grams of CO2 and grams of H2O are produced when 13.0g C2H2?

chemistry
How many grams of O2 are required to burn 13.0g of acetylene?

US History
How did the US become involved in the politics of Southeast Asia?

History
What did Kennedy hope to accomplish with the New Frontier?

Personal Finance
Mike Welch purchased 5,000 shares of Grass Roots stock for $82 per share and paid a commission of 1% on the purchase price. The current value of the stock is $96 per share. Mike received no dividends last year.

physics
1. A sound is made by a speaker, which then radiates in all directions. The sound wave is described by A(r) sin(2r - 600t) where the distances are in meters, and the time in seconds. The A(r) just indicates that the amplitude has some distance dependence--it decreases smoothly...

science
A 250 kg object is acceelerating at 2.8 m/s2. What force was required to achieve this?

Alegbra 2
how do i find out what the amplitude, period, h, k and midline of problems 1) y= sin (x-5)=7 2) y=3 cos (x- pie) -1 3) y= Sin3x+4 4) y= 1/2 cos 2x-2

Physics
A 3 Kg lead ball is dropped into a 3 L insulated pail of water initially at 20.0 degrees C. If the final temperature of the water-lead combination is 25 degress C, what was the initial temperature of the lead ball?

Chemistry
A cubic piece of metal measures 7.50 cm on each edge. If the metal is nickel, whose density is 8.90g/cm^3, what is the mass of the cube?

Physics
A class of 11 students taking an exam has a power output per student of 124 W. Assume that the initial temperature of the room is 18.7°C and that its dimensions are 6.00 m by 14.5 m by 3.40 m. What is the temperature (in °C, do not enter units) of the room at the end o...

VHS
a triangle has sides with lengths of 11 meters, 9 meters, and 7 meters. what type of triangle is it?

Controls
If you have a tank of water at sea level and the temperature of the water in the tank is 110 degrees F, what is the height of the water if the pressure at the bottom of the tank is 95 inches of mercury(absolute)

Chemistry
The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride. 5 F2(g) + 2 NH3(g) N2F4(g) + 6 HF(g) (a) If you have 73.7 g NH3, how many grams of F2 are required for complete reaction? b) How many grams of NH3, are required to produce 5.25 g HF?...

Social Studies
i donno

Math
To win one million dollars, you must draw two cards whose sum is nine, from a stack of cards numbered through 10. After the first draw you replace the card and shuffle the stack again for the the second draw. What is the chance that your two cards will have a sum of nine.?

physics
The blades of a fan running at low speed turn at 200 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 340 rpm in 5.92 s. How many revolutions do the blades go through while the fan is accelerating?

Physics
The blades of a fan running at low speed turn at 200 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 340 rpm in 5.92 s. (a) What is the magnitude of the angular acceleration of the blades? (b) How many revolutions do the blades go through ...

Physics
A 15500 N automobile travels at a speed of 41 km/h northward along a street, and a 7000 N sports car travels at a speed of 65 km/h eastward along an intersecting street. a)If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocit...

college math
Express (cos^2t/tan^2t) as an expression that involves only the sine function.

Science-Chemistry
Calculate the number of grams of carbon dioxide that can be absorbed by a complete reaction with a solution that contains 5.00 grams of sodium hydroxide

Math
thank you very much damon!

Math
If a shopkeeper sold 15 boxes of pencils on Mon and Tues. He sold 3 more boxes on Mon then on Tues. There were 12 pencils in each box. How many pencils did he sell on Monday.

math
How do i do mixed numbers to improper fractions.

Physics
A 15.0 g rubber bullet hits a wall with a speed of 140 m/s. If the bullet bounces straight back with a speed of 125 m/s, what is the change in momentum of the bullet?

Chemistry
A sample of gas has a mass of 0.555 g. Its volume is 119 mL at a temperature of 90 degrees C and a pressure of 744 mmHg. What is the molar mass of the gas?

chemistry
What volume of O2 at 912 mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?

Chemistry
How many liters of O2 gas, measured at 772 mmHg and 20 degrees C, are required to completely react with 2.4 mol of Al?

Chemistry
What is 832 torr converted to atm?

Chemistry
What is 17.4 psi converted to atm?

Chemistry
What volume of O2 at 912mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?

Pharm Tech
how many milliliters of a 5% stock solution are needed to prepare 250ml of a 2% solution?

Chemistry
If 1.0L of spilled 1M HCl needed to be neutralized using solid sodium carbonate, how many grams of solid would be required? a)53g b)106g c)1060g d)530g

3rd grade
what is the capital of brizil

pre algerbra
question: write the expression for a number used as a factor seventeen times being multiplied by the same number used as a factor fourteen times.then write the product as one power?

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