Monday

July 28, 2014

July 28, 2014

Total # Posts: 1,059

**Physics**

Find the net force of gravity on the moon (Mm = 7.35 x 10^22 kg) from the earth and the sun (Ms = 1.99 x 10^30). Assume that the two forces are perpendicular to each other. Give the angle in relationship to the sun.

**Science**

a scooter goes from a velocity of 6.9 m/s to a velocity of 4.8 m/s in a time of 5.1 seconds. what is the acceleration of the scooter

**Chemistry**

How many moles of chloroform, CHCl^3, are required to fill a 253-ml flask at 100.0 degrees Celsuis and 940 torr?

**Chemistry**

A sample of air has a volume of 140.0 mL at 67 degrees Celsius. At what temperature would its volume be 50.0 mL at constant pressure?

**calculus **

That's what I have done, I have expanded it to get the derivative, but I am having problems solving for t.

**calculus **

If the fish population, p, in a lake can be modelled by the function p(t)=15(t^2+30)(t+8), where t is the time, in years , from now. How do I determine the rate of change when the population when there are 5000 fish in the lake?

**college physics**

If a rope with linear mass density .167kg/m and is 4m long, what are the lowest four frequencies of standing waves possible on such a rope? What is the fundamental frequency?

**Physics**

A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle = 20°. For a speed of 29 m/s, at what value of the distance d should a driver locate his car if he ...

**Physics**

A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle = 20°. For a speed of 29 m/s, at what value of the distance d should a driver locate his car if he ...

**Physics**

A satellite has a mass of 6000 kg and is in a circular orbit 4.20 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20 106 m. What is the true weight of the satellite when it is at rest on the planet's surface?

**Physics**

A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 2.60 104 s. What is the speed at which the satellite travels?

**chemestry**

an aqueous solution was prepared by dissolving 1438.0g of a nonelectrolyte in 469.0g of water at 25*c. the Vapor pressure of the resulting solution was found to be 20.5 torr. what is the molar mass of the unknown compound? the vapor pressure of the water at 25*c is 23.76torr.

**Chemistry (Stoichiometry)**

Magnesium powder reacts with steam to form magnesium hydroxide and hydrogen gas. a) Write a balanced chemical equation for this reaction. b) What is the percentage yield if 10.1g Mg reacts with an excess of water and 21.0g Mg(OH)2 is recovered? c) If 24g Mg is used and the per...

**algebra**

a 9 foot board is cut in two pieces . one is 3.5 feet longer than the other . how long is the longer piece

**physics**

Wnc=change in energy=ef-eo =.5mvf^2 - mgh Should get -32540.68 J

**math**

Create your own word problem that uses a system of equations to solve. Your problem must include the following words: beach,hammock,dance,and troll.

**math**

s=5k+5z

**math**

A 75ft diagnol brace on a bridge connects a support of the center of the bridge The horizontal distance that it spans is 15ft longer than the hieght that reaches on the side of the bridge.Find the horizontal and vertical distance spanned by this brace

**math**

Andrew factored the expression 54x^3-30x^2+15x as 5x(9x^2-6x+3) but when Melissa applied the distributive law and multiplied out 5x(9x^2-6x+3). she got 45x^3-30x^2+15x. thus andrew's solution does not appear to check. why is this? eplain your reasoning and correctly factor...

**Physics**

A guitar string, destined to be an upper E string, has length 100 cm and mass 0.400 g. a. What is its mass per unit length? u = m/L = 0.004 g/cm b. What length of this string should be used on a guitar if the fundamental frequency is to be 330 Hz and its tension is to be 100 N...

**math**

The are of a rectangular athletic field is represented by the expression 12y^3+48y^2+24y square meters.write an algebriac expression to represent one possible set of dimensions (in the same sense''length times width'')of the althetic field. include the correct ...

**Physics**

A fountain contains a 3 m tall cylinder with holes placed at a height of 1 m and 2m. The water level is kept constant at a height of 3 m by an input pipe. As water shoots out from the tube, it strikes the fountain pool at some distance x away from the cylinder. Find x for each...

**Chemistry **

Given the following equation: 2KClO3---> 2KCl+3O2 How many moles of O2 can be produced by letting 12.00 moles of KClO3 react?

**Chemistry**

for each of the following balanced chemical equations write all possible mole ratios. Mg+ 2HF---> MgF^2+ H^2

**Chemistry 2**

Styrene, C8H8, is one of the substances used in the production of synthetic rubber. When styrene burns in oxygen to form carbon dioxide and liquid water under standard-state conditions at 25°C, 42.62 kJ are released per gram of styrene. Find the standard enthalpy of format...

**algebra**

(y^4+3y-5)/(y^2+7) find the quotient

**physics**

CALCULATE THE ACCELERATION FOR A 10.0 KG BLOCK WHICH IS BEING PULLED UP A 35.0 DEGREE SLOPE BY A FORCE OF 140 N IF THE COEFFICIENT OF SLIDING FRICTION IS 0.100

**physics**

CALCULATE THE ACCELERATION FOR A 10.0 KG BLOCK WHICH IS BEING PULLED UP A 35.0 DEGREE SLOPE BY A FORCE OF 140 N IF THE COEFFICIENT OF SLIDING FRICTION IS 0.100

**math**

how do I solve (4x^2-9y^2)/2x+3y)

**math**

how do I solve (4x^2-9y^2)/2x+3y)

**Chemistry**

What are the products for the combustion of a a hydrocarbon.

**Science**

when a cell has a specific function, it is called what?

**math**

(1/3 +5/6)divided by 2/5=? in simplest form

**7th grade math**

21/8 divided by 5/6=? in simplest form

**Calculus**

A ladder 41 feet long that was leaning against a vertical wall begins to slip. Its top slides down the wall while its bottom moves along the level ground at a constant speed of 4 feet per second. How fast is the top of the ladder moving when its 9 ft above the ground?

**Physics**

Two balls, each with mass 0.5g and carrying charge Q, are hung on strings 35cm and suspended from one point. The balls repel and form a 40 degree angle between them. What is the charge? CAN YOU WALK ME THROUGH THIS QUESTION?

**math**

find the difference (6x^2-3x-9)-(2x^2+8x+3)

**physics**

A typical sugar cube has an edge length of 1.0 cm. If you had a cubical box that contained 1.7 mol of sugar cubes, what would its edge length be? (One mole = 6.02 x 1023 units.) and A severe thunderstorm dumped 2.6 in of rain in 30 min on a town of area 32 km2. What mass of wa...

**Chemistry**

I'm really not getting how to solve these chemical equations. If someone could explain to me their method of solving. I know you have to list the number of reactants and products for each side but I get confused what you add and what determines what you add. Stuff like tha...

**Chemistry**

if each "hydrogen" atom has a mass of 1g and each "carbon" atom has a mass of 12g what is the ratio of the mass of 1 mole of carbon to one mole of hydrogen

**Physics**

After driving 20.0 km west, a car turns southwest and proceeds another 80.0 km. What is the displacement (in kilometers) of the car from the point of origin (magnitude only)?

**grammar**

Trumpets and trombones are part of our band. In some ways this feels like part is a direct object, but it also seems like this could be an intransitive sentence.

**grammar**

transitive :)

**grammar**

Miss, give me that cake. In this sentence, is the subject "you" since it is imperative, or is the subject Miss. If you think of the sentence like this: (You) give me the cake, miss, it seems like it would be intransitive with an active verb. Is that right?

**Grammar**

Can What be a subject? Or is song the subject?

**Grammar**

Is it also intransitive?

**Grammar**

I'm working with linking, transitive and intransitive verbs. For this sentence, do I need to write it as a statement? I think it is a linking verb. Intransitive? "What is the most popular song in the country this week?"

**math**

A plane travels at a rate of 425 miles per hour. Write an expression to show the distance it travels, if t reprents hours.

**math**

jonna and elizabeth found a level campsite and pitched thier tent as shown below.if m <2 explain your reasoning

**math**

a man hods a rifle in a horizontal postion 4 feet above the ground and shoots the bullet with an initial velocity of 2000 fps horizontally. it may be assumed that the ground is level, what will be the horizontal distance from the man to the point at which the bullet strikes th...

**Pre algebra(3)**

$29/kg is how many cents/g

**algebra (inequalities)**

a. 120p> 175 b. p> 1.46

**Geometry**

If AB = 3x +8 and GJ = 2x +24 what is AB? AB and GJ are ||

**math **

125x.1 explain the decimal movement when multiplying by .1

**7th grade math**

500 divided by 100 explain the decimal movement when dividing by 100.

**7th grade math**

125x.1 explain the decimal movement when mutiplying by.1

**7th grade math**

50 divided by 10 EXPLAIN THE DECEMAL MOVEMENT WHEN DIVIDING BY 10.

**geometry**

In isosceles triangle ABC, AB = BC, and D is a point between A and C on AC. Can you conclude MO > ML, MN > MO, angle L > angle BDA, or angle N > angle BDC

**math**

in the question 6radical x +3 radical y -2radical y +3 radical x -radical y is the answer 9 radical x +1 radical y. i just dont get it thanks

**science**

how does the distribution of animal tissues in an organism difer from the distribution of tissues in a plant

**Math**

7a/4

**math**

what's the final answer??

**english**

I need help really quick unscrambling this word!!! AAAATTTLIIRRONNME Its two words and its the name of a mall. the first words starts with I and the second starts with M.

**math**

substitution

**math**

Solve the following linear system of equations. 3x-2y+z=2 x-y+z=2 5x+10y-5Z=10

**Math**

Let f(x)=-(x-1)^2+4 Solve f(x)=0 to find the x-intercepts

**Math**

A lottery prize worth $1,000,000 is awarded in payments of $10,000 five times a year for 20 years. Suppose the money is worth 20% compounded five times per year. What is the formula used to find the present value of the prize?

**Math**

How much would have to be invested at the end of each year at 6% interest compounded annually to pay off a debt of $80,000 in 10 years?

**Legal aspects healthcare**

You are so right. It has to be true.

**Legal aspects healthcare**

Healthcare professionals who have a “need to know” access to medical records have a legal and an ethical obligation to protect the confidentiality of the patient information. I think it is not true, right?

**chemistry **

Predict the product: hydrogen peroxide (catalyzed by manganese dioxide)

**algebra**

43-n= 27

**English**

I need to find 2 medaphors in the book Among the Enemy by Margaret Peterson Haddix. I can't find them after I've read it twice.

**Science**

Thank you. That helped a lot.

**Science**

I have to write a project proposal about the global climate crisis so I can do a report and powerpoint. I need suggestions on what to write about by answering the following questions.... How do I affect the water and carbon cycle and what can I do to lesson my negative impact ...

**Physics**

A centrifuge rotor rotating at 10700 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 2.48 m * N. 1. If the mass of the rotor is 5.61 kg and it can be approximated as a solid cylinder of radius 0.0820 m, through how many revolutions will th...

**Physics**

A bicycle with tires .064 m in diameter travels 8.1 km. 1. How many revolutions do the wheels make?

**Physics**

The blades in a blender rotate at a rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 2.6 s. 1. What is the angular acceleration as the blades slow down?

**Physics**

A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 4.6×10−5 rad. 1. What diameter spot will it make on the Moon?

**college physics**

An ideal gas (volume 1.1m3, pressure 103600 Pa, temperature 400 K) undergoes an isothermal process during which it absorbs 2000 J of heat. How much did the entropy of the system increase?

**college physics**

An ideal gas (volume 1.1m3, pressure 103600 Pa, temperature 400 K) undergoes an isothermal process during which it absorbs 2000 J of heat. How much did the entropy of the system increase?

**chemistry**

H2C=CH2(g) + H2(g) C2H6(g) Adding a small amount of platinum powder greatly increases the rate of the reaction above. How might the platinum be affecting the rate of the reaction? (Select all that apply.) 1) It increases the concentration of the reactants. 2) It increases the ...

**Math**

5/9 X (98.6 Fahrenheit - 32)=?

**Math**

5/9 (98.6 F - 32)=

**chemistry**

Write the formulas for these compounds 1. manganese (IV) oxide 2. nickel (II) chloride 3. zinc chloride

**english 11**

King Arthur legend relates to sir gawain and the green knight and monty python and the holy grail?

**Physics Homework**

The answer is b. Archimedes principle states that if the the weight of the object is smaller than the displacement of the water, then the object will rise.

**Physics**

A 0.028 kg rifle bullet traveling 210 m/s buries itself in a 3.1 kg pendulum hanging on a 2.5 m long string, which makes the pendulum swing upward in an arc. 1. Determine the vertical and horizontal components of the pendulum's displacement.

**Physics**

A tennis ball of mass= 0.058 kg and speed= 19 m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degrees. 1. What is the magnitude of the impulse given to the ball? 2. What is the direction of the impulse given to the ball?

**Grammer**

The smell of cooking is delicious to the hungry campers

**Chemistry**

can you explain how to determine the shape of it though?

**Chemistry**

Draw the Lewis structures for each of the following, determine the shape of the molecules. a. H2S b. CN3- c. CCl4 d.NH4 e.PO4- f.PCL3 f.SF6 and explain how do you determine the shape of it

**Physics**

A 12 kg hammer strikes a nail at a velocity of 8.2 m/s and comes to rest in a time interval of 0.0083 s. 1. What is the impulse given to the nail? 2. What is the average force acting on the nail?

**Chemistry**

Explain how shielding contributes to the atomic radius trend within a group.

**social studies**

what is the official language of the phillopines

**7th grade**

give 2 other names for 2.5 dm measurement

**lever**

What is the definition of a lever

**9th grade**

A bowler rolls a 5 kg bowling ball down a magical frictionless bowling alley. The ball accelerates at an average rate of 2 m/s^2. How much force did the bowler apply to the ball?

**Physics**

A novice skier, starting from rest, slides down a frictionless 35.0 degrees incline whose vertical height is 140 m. 1. How fast is she going when she reaches the bottom?

**orgo**

Which acid, maleic or fumaric acid appears to be more reactive to bromine addition? How does the cis/trans affect this?

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | **6** | 7 | 8 | 9 | 10 | 11 | Next>>