Wednesday

May 4, 2016
Total # Posts: 1,339

**PHYSICS**

A free electron and a free proton are exactly 1.0 com apart. Find the magnitude and direction of (a) the acceleration of the proton and (b) the acceleration of the electron.
*February 22, 2012*

**PHYSICS help please**

Two small charged balls have a repulsive force of 0.12 N when they are separated by a distance of 0.85 m. The balls are moved closer together, until the repulsive force is 0.60 N. How far apart are they now?
*February 22, 2012*

**consumer math**

The graph represents the purchasing power if the inflation is 12%. Estimate the purchasing power of a monthly salary of $3000?
*February 21, 2012*

**Math**

You made $3000 on a part time job last year. If you expect to make the same amount this year and the inflation rate is 3%, what is your purchasing power?
*February 21, 2012*

**chemistry**

When 16.3 g of magnesiumm reacts with 4.52 g of oxygen, how many grams of magnesium oxide will be performed? Identify the limiting and excess reactants.
*February 15, 2012*

**Math: Word Problem/Percets**

374
*February 13, 2012*

**Math: Word Problem/Percets**

Stevie bought a stereo for $220 and put it on sale at his store at a 70% markup rate. What was the retail price of the stereo?
*February 13, 2012*

**finite**

In how many ways can this be done?
*February 13, 2012*

**finite**

Assume that a committee consists of 12 people including the chairperson and that the chairperson must select a committee of 3 people from the other 11 members of the committee.
*February 13, 2012*

**College Chemistry**

i have no idea. i was given a few conversion factors but i always end up with something that i dont know how to convert
*February 13, 2012*

**College Chemistry**

previous answer to problem before this one(relevant in 2nd half of this question): 294.472689amu what would be the mass of 1.36 moles of these atoms? Enter your answer here: ____ g
*February 13, 2012*

**math**

Assume that there are 11 girls and 9 boys in the neighborhood club, and a team of 6 is to be selected.How many different teams can be selected if each team must contain exactly 3 girls and 3 boys?
*February 13, 2012*

**Math**

Assume that a committee consists of 12 people including the chairperson and that the chairperson must select a committee of 3 people from the other 11 members of the committee. In how many ways can this be done?
*February 13, 2012*

**Math**

Assume that the committee consists of 8 Republicans and 6 Democrats. A subcommittee consisting of 7 people is to be selected. How many such subcommittees are possible if each subcommittee must contain at least 1 and no more than 3 Democrats?
*February 13, 2012*

**Math**

Assume that you have 7 dimes and 5 quarters (all distinct), and you select 4 coins. In how many ways can the selection be made so that at least 3 coins are dimes?In how many ways can the selection be made so that at least 3 coins are dimes?
*February 13, 2012*

**math-measurement**

divide 3 gallons by 4
*February 12, 2012*

**math**

divide 1 yd 4 in. by 5
*February 12, 2012*

**math-measurement**

How do i multiply 2 yards 1 foot by 8
*February 12, 2012*

**math-measurement**

Multiply 2 yards 1 foot by 8
*February 12, 2012*

**math**

Subtract 1 ft 7 in. from 2ft. 2in.
*February 12, 2012*

**math-measurement**

Subtract 1 foot 7 inch from 2 feet 2 inches
*February 12, 2012*

**science4**

Last one i swear.... If the manatees were able to make 3 adaptions to their body or way of life for their survival, what would they be?
*February 12, 2012*

**SCIENCE3**

i still dont know..
*February 12, 2012*

**SCIENCE3**

Identify one external feature of the manatee that allows it to live in water. Please help me with this one too!?
*February 12, 2012*

**SCIENCE2**

They both eat plants?
*February 12, 2012*

**SCIENCE2**

WHY IS THE MANATEE CLASSIFIED AS AN HERBIVORE? PLEASE HELP ME WITH THIS ONE TOO!
*February 12, 2012*

**SCIENCE**

LIST TWO ENVIRONMENTAL CONDITIONS THAT MIGHT LEAD TO THE DISAPPEARANCE OF MANATEES FROM FLORIDA'S RIVERS? PLEASE HELP.
*February 12, 2012*

**math-measurement**

How do i subtract 20 minutes 45 seconds from 1/2 hour
*February 11, 2012*

**help**

Thankyou!
*February 9, 2012*

**help**

Can you please give me study links? For angle sum theory, reflection, rotation,translation,Dilation,Complementary,Supplementary,parrell lines with transversal, vertical, cooresponding,alt,int,alt,ext? Do you have any tricks to remember how to do these? NEED TO PASS THIS TEST. ...
*February 9, 2012*

**Calculus**

Find the area bounded by y=1/x, the x-axis and the lines y=1 and x=4
*February 4, 2012*

**Physics**

If the ball is tossed upward at 20 m/s, how long should it take before it reverses its direction (reaches its maximum height where its velocity is zero)?
*February 4, 2012*

**physics**

A person pushes a 17.0 kg lawn mower at constant speed with a force of 74.0 N directed along the handle, which is at an angle of è = 48.0° to the horizontal (b) Calculate the horizontal retarding force on the mower (c) Calculate the normal force exerted vertically ...
*February 2, 2012*

**math**

he added 15+16+17... not all even numbers
*February 1, 2012*

**calculus**

find the area enclosed by y=x^2 and y=sinx in the first quadrant.
*February 1, 2012*

**Math**

40-24=16 16/40= 2/5 spokes
*February 1, 2012*

**math**

3 and 1.5
*February 1, 2012*

**World Civilization**

what was the fighting in russia and se europe known as?
*January 26, 2012*

**history**

what was the primary goal of president ford's WIN program?
*January 25, 2012*

**Social Studies 7R**

i need help with my homework ugh
*January 24, 2012*

**math**

FRACTION
*January 21, 2012*

**Physics**

A skateboarder, starting from rest, rolls down a 12.5-m ramp. When she arrives at the bottom of the ramp her speed is 6.45 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.
*January 20, 2012*

**consumer math**

The following describes the status of the O'Daniel's budget. A) It is in surplus B) It is in deficit C) It is balanced
*January 18, 2012*

**consumer math**

The graph represents the purchasing power if the inflation is 12%. Estimate the purchasing power of a monthly salary of $3000?
*January 18, 2012*

**7th Grade English**

Bethany showed perserance by showing that even though she only has one arm she can still do pretty much everything a normal person can do with two arms.
*January 17, 2012*

**boaz**

Ray AB bisects angle CAD. Find the value of x. CAB= 15X-25 BAD= 4X+63
*January 17, 2012*

**Math**

The bill for a family of four at a restaurant was $ 62. Simon paid $ 72 for the meal and tip. How much was the tip? What percent was the tip?
*January 11, 2012*

**math**

Okay so i here is the problem......find the unit rate. I dont remember how to solve for the unit rate. Help me please i have a quiz tomorrow.
*January 9, 2012*

**geometry**

Find the area of square QRST with the following vertices Q(-2, 3), R(1, 0), S(4, 3) and T(1, 6).
*January 4, 2012*

**math**

Find the values of x that satisfy the inequality -3 > 11 + 2x
*December 29, 2011*

**Physics**

I'm so glad I'm not the only one lost in VASTS. What a relief!
*December 28, 2011*

**Math**

Juan says, "When you put together unequal groups, you can only add." Is he correct? Explain.
*December 19, 2011*

**Math**

To get an A in psychology, a student must score an average of 90 on four tests. Scores on the first three tests were 96,92,88. What is the lowest score the student can make on the last test and still get an A?
*December 8, 2011*

**reading**

yes they do
*December 8, 2011*

**math**

Yes she has five now, very good u did excellent
*December 8, 2011*

**science**

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
*December 7, 2011*

**Physics**

A 0.165-kg ball, moving in the positive direction at 10 m/s, is acted on by the impulse shown in the graph below. What is the ball's speed at 4.0 s?
*November 30, 2011*

**physics**

Two rocks sitting in the field are 200m apart. If the two rocks have a mass of 75Kg and 100Kg respectively, what is the gravitional force between them? Answer now pls!!
*November 30, 2011*

**Physics**

What is the magnitude of the gravitational field at the surface of a neutron star whose mass is 1.64 times the mass of the Sun and whose radius is 9.1 km?
*November 28, 2011*

**Physics Help Please**

You know that kinetic energy is 1/2*mass of box*velocity squared and that potential energy is mass of box*gravity*height. Conservation of energy says that kinetic energy initial plus the initial potential energy = final kinetic energy plus initial potential energy. you set ...
*November 28, 2011*

**calculus, math**

Use Newton's method to approximate the value of (543)^(1/5) as follows: Let x1=2 be the initial approximation. find x2 and x3 =? approximation
*November 22, 2011*

**Physics**

Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ω0, but in opposite directions. The two disks are brought slowly together. The resulting frictional force between the surfaces eventually brings them...
*November 19, 2011*

**pre algebra**

What is the answer to (-6t^4)(4t^2m^7
*November 14, 2011*

**Calculus**

A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $2 per square foot and the metal for the sides costs $7 per square foot. Find the dimensions that minimize cost if the box has a volume of 30 cubic feet. ...
*November 13, 2011*

**Physics**

A 2.9-kg 12-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 20 N. (a) Find the magnitude of the torque exerted by the rope. (b) Find the angular acceleration of ...
*November 9, 2011*

**algebraic expressions**

there are 24 students in a science class. Mr. Sato will give each pair of students 3 magnets. So far, Mr. Sato has given 9 pairs of students their 3 magnets. homw many more magents does Mr. Sato need so that each pair of students has excatly 3 magnets.
*November 8, 2011*

**Algebra**

Solve 2.3 = -y/2 How do I solve this?
*November 8, 2011*

**Geography**

Other people or other countries
*November 2, 2011*

**Geography**

What would some consequences be if latin america legalized marijuana for recreational use?
*November 2, 2011*

**Culture**

What are some reasons why some people would belive that the Day of the dead celebration is wrong?
*November 1, 2011*

**MATH**

i am in 4th grade doing my sisters homework dont ask why but i need help on this question. -- Explain why the cost of an item discounted 20% can be calculated by multiplying the original price by 0.8
*October 30, 2011*

**physics**

What acceleration will you give to a 24.2 kg box if you push it horizontally with a net force of 82.0 N?
*October 30, 2011*

**Physics**

A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 7.0 m/s at the end of 7.0 s. At that instant, the kinetic energy of the system is 60 J and each mass has moved a distance of 24.5 m. Determine the values of m1 and m2.
*October 26, 2011*

**math**

4=2/9(4y-2)
*October 23, 2011*

**Biology **

An individual can be a carrier for a particular disease yet not have the disease because the disease is recessive. That means to have the disease you need to carry both of the recessive genes of the disease (rr) and to get both the recessive genes your parents need to each be ...
*October 22, 2011*

**Physics**

The heating element of a simple heater consists of a 2.2m--long, 0.70mm--diameter nichrome wire. When plugged into a 120 V outlet, the heater draws 7.5 A of current when hot. I found that the wire's resistance when it was hot was 16 ohms. Now using this answer of 16 ohms ...
*October 21, 2011*

**math**

linear equations
*October 20, 2011*

**Physics**

A tether ball of mass 0.25 kg is attached to a vertical pole by a cord 1.4 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? (b) What is the speed of the ball?
*October 12, 2011*

**Physics**

A 4.6-kg block slides down an inclined plane that makes an angle of 26° with the horizontal. Starting from rest, the block slides a distance of 2.6 m in 4.9 s. Find the coefficient of kinetic friction between the block and plane.
*October 12, 2011*

**Science**

what is wrong with teachers now days
*October 11, 2011*

**teacher aide**

Name and provide the website address of the National OHS organisation. Visit their website and download a piece of information relevant to your workplace. Please help thanks for your time!
*October 7, 2011*

**Physics**

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
*October 3, 2011*

**Phsics**

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
*October 3, 2011*

**Physics**

A= 100kg and B=10kg A is on the surface and B is attached to A.
*October 3, 2011*

**Physics**

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless.
*October 3, 2011*

**chemistry**

CH4 + 2O2 = CO2 + 2H2O Starting with 13.6 g of CH4, calculate the mass in grams of CO2 produced if there is enough O2 gas to react with all of the CH4
*October 3, 2011*

**History**

How does syncretism relate to religious beliefs?
*September 30, 2011*

**Physics**

A ball launched from ground level lands 2.7 s later on a level field 50 m away from the launch point. Find the magnitude of the initial velocity vector and the angle it is above the horizontal. (Ignore any effects due to air resistance.) A. Find the magnitude m/s B. Find the ...
*September 28, 2011*

**physics**

A spring has a force constant of 50 N/m. The spring is compressed by 0.4 m. How much energy has the spring stored?
*September 27, 2011*

**Maths**

Nathan has a bag of marbles. Half of them are blue.Eight are red & a sixth of them are cat's eyes. How many marbles are in Nathan's bag?
*September 26, 2011*

**Math**

`How do you round to the nearest 10's,100's and 1,000's place with 4-digit numbers
*September 21, 2011*

**Math**

y+19=9
*September 21, 2011*

**4th grade math**

8642
*September 21, 2011*

**4th grade math**

8,642
*September 21, 2011*

**lit**

Is this right? My friend jumped off the diving board and shouted "look out below!"
*September 20, 2011*

**Science**

Spring scale
*September 19, 2011*

**english**

When Marcos walked into the room, we turned on the lights and yelled "Happy birthday!"
*September 16, 2011*

**physics**

i do not understand that formula bob i got 0.317 what do you get cause mine is wrong
*September 15, 2011*

**physics**

An airport has runways only 142 m long. Asmall plane must reach a ground speed of 45 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport?Answer in units of m/s2.
*September 15, 2011*