# Posts by will

Total # Posts: 471

**Physics**

A mine car (mass 380 kg) rolls at a speed of 0.5 m/s on a horizontal track, as the drawing shows. A 150 kg chunk of coal has a speed of 0.80 m/s when it leaves the chute. Determine the velocity of the car/coal system after the coal has come to rest in the car.

**Physics**

A car (mass = 1150 kg) is traveling at 32 m/s when it collides head-on with a sport utility vehicle (mass = 2550 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?

**Physics**

The third piece is said to be 1.30 kg at 3.07 m/s. M1 has an angle of 25 and m2 had an angle of 45 and the question ias aking what are the masses for m1 and m2

**Physics**

ssm By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 2.95 m/s and v2 = 1.70 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision...

**Physics**

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as shown below, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces acting...

**Physics**

An 85 kg jogger is heading due east at a speed of 1.7 m/s. A 55 kg jogger is heading 40° north of east at a speed of 3.4 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.

**Math**

Why is it important to follow the order of operations instead of solving from left to right?

**math**

How can you use data analysis and statistics in everyday life?

**math**

An A-frame cabin has a triangular front with a base of 30 ft and a height of 20 ft. If the front is to be glass that costs $3 per square foot, what will the glass cost?

**math**

A circular coffee table has a diameter of 5 ft. What will it cost to have the top refinished if the company charges $3 per square foot for the refinishing?

**math**

J2

**math**

according to the book it should be 48

**math**

When finidng the lest common multiply why how do you know which way to list the factoring so that you get the LCM 12=2*2*3 16=2*2*2 I say 2*2*2*3=24 LCM should be 48 What am I doing worng?

**4th grade math**

We also got ten, but we trying to explain it to a 9 year old for her schoolwork. That is where we are stuck.

**4th grade math**

A store clerk wants to stack 55 cans of tennis balls in a triangular display. How many cans would be in the bottom row?

**physics**

A car is traveling 26 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?

**Calculus**

f(x)=x^2-x+3 , n=6 , a=0, b=3 find LRAM, RRAM, and MRAM for x is greater than or equal to a or less than or equal to b

**math**

Choose the correct greatest common factor of 75, 195, and 325.

**math**

okay now I see what I was doing wrong. I was multiplying 1/60,000 by 15/4 instead og 60,000/1 my final answer is $16,000

**math**

I can not use decimals yet I need to work this out in fraction form and that is why I am stuck.

**math**

A piece of land measures 3 3/4 acres and is for sale at $60,000. What is the price per acre? How do I set this up? 3*4+1=15/4 15/4 divided by 60,000/1????

**math**

college refresher cours

**math**

Did figure it out, and they both have the same batting average, which is 3 1/8 times.

**math**

thank you I will try and let you know what i come up with

**math**

I still do not understand. In class we are working on multiply and dividing fractions and putting them into simplest form. Do I break them both down into simplest form and then compare?

**math**

I do not understand how to set up this problem so i can solve it. Jeff Bagwell of the Houston Astros has 104 hits in 325 times at bat. Matt Williams of the Arizona Diamondbacks has 88 hits in 275 times at bat. Do they have the same batting average?

**health**

What are some of the reasons dietary modifications may be needed in different life stages

**physics**

A 1.5-kg object moves up the y-axis at a constant speed. When it reaches the origin, the forces F1 = 5.0 N at 37 degrees. above the +xaxis, F2 N in the +X direction, F3 = 3.5 N at 45 degrees below the -X axis, and the F4 = 1.5 N in the - y direction are applied to it. a)Will ...

**religion**

What are two important Rituals of the LDS faith?

**Religion**

Does the LDS church discriminate against sexuality, race or nonnuclear families?

**Spelling**

I'm doing opposites and can't figure out this one Not include, but e _ _ _ _ e? Also Not colorful, but c _ l _ _ _ e _ _ ?

**Algebra**

Increased price is: $230.00 Percent increase is: 15% What was the original price? Having trouble with how to setup equation to solve problem.

**math**

is there more than one way to convert20/8 to a mixed number?explain

**math**

is there more than one way to convert 20/8 to a mixed number? explain

**math**

is there more than one way to convert20/8to a mixed number? explain

**Physics**

i cant get this right. what is the measured resistance of a 1000ohm, 500ohm and a 100 ohm resistor. and there % error

**physics ASAP**

Can someone give me an example of how to use this formula: Obtain three half-life (T0.5) times from the graph. Average them.(T0.5)av. Or is there a web site i can go to that shows all steps to using pennies for radioactive decay experiment? .

**Physics**

Can someone give me an example of how to use this formula: 15.Obtain three half-life (T0.5) times from the graph. Average them.(T0.5)av. Or is there a web site i can go to that shows all steps to using pennies for radioactive decay experiment? .

**Spelling**

How about not colorful, but c _ l _ _ _ e _ _?

**physic**

What exactly is transmutation?

**Physics**

Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?

**Physic**

Why do protons in a very large nucleus have a greater chance of flying apart by electrical repulsion?

**physics**

Distinguish between atomic number and atomic mass number.

**Physics**

How does the mass of a nucleon compare with the mass of an electron

**Physics**

1.How does the mass of a nucleon compare with the mass of an electron? 2.Distinguish between atomic number and atomic mass number. 3.Why do protons in a very large nucleus have a greater chance of flying apart by electrical repulsion? 4.What exactly is transmutation? 5....

**physics**

is there a site where i can see if my calculations ofmeasurements or resistors is correct. or where i can see other problems that deal with the tesing or reistors and there results

**physics**

1.Distinguish between atomic physics and nuclear physics? 2.Briefly describe the Bohr model of the atom. What is Bohr’s key idea (involving matter waves) that makes the Bohr atom have discrete energy levels? I really didn't understand what they were wanting, so many ...

**physics**

The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest, or “ground” state, n=3 is the third state, and so on. If the atom’s diameter is 1x10-10m ...

**Physics**

1.How can you easily increase the magnetic field strength inside a current-carrying coil? 2.What is a magnetic domain? What is the difference between an ordinary iron nail and a permanent magnet? How does the idea of magnetic fields arising from circulating currents relate to ...

**find the rate**

240 lbs of fertilizer/6 lawns

**Physics**

What does 60Hz, 120V electricity mean? Name a device that produces DC electricity. I didn't understand

**Physics**

Name a device that produces DC electricity. What does 60Hz, 120V electricity mean?

**physics**

a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s

**physics**

How does one Coulomb of charge compare to the charge on an electron? How do you think such a large difference arose historically? i got that the have the same mass and charge. i didn't understand the second part

**math (mode, median, range)**

mode median rang

**Physics HELP PLEASE**

two spherical objects are separated by a distance of 9x10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object ...

**Ms. Sue--**

it would be A

**Physics URGENT!!!**

two charges attract each other with a force of 2.5 N. What will be the force if the distance between them is reduced to one-ninth its orginal value?

**Physics**

At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it go? i still cant get this one right. i think im not doing the formula right

**to kill a mockingbird**

why does tom robinson escape from prison knowing that he will face an appeal? Please Help This site will help you with that question: http://www.sparknotes.com/lit/mocking/

**math**

does anybody know what the slope of 20,1 7,-19 Four numbers do not define a slope, unless you consider them as two pairs of (x,y) coordinates. Please be more precise about what you are talking about

**Social Studies**

why is indianapolis know as the "Crossroads on America"? http://en.wikipedia.org/wiki/Crossroads_of_America

**Social Studies**

Why did the settlers name their community Seattle? http://www.chiefseattle.com/history/chiefseattle/chief.htm

**WAVE CALCULATION QUESTION URGENT!!!!!!!!**

Convert 8.6 x 10^13 Hz to nanometers. Assuming this is a light wave, Frequency*wavelength= speed oflight jiko like question jiko know all. ;.)

**Chemistry Periodic Trends**

The electron affinities of the elements from aluminum to chlorine are -44, -120, -74, -200.4, and -384.7 kJ/mol respectively. Rationalize the trend in these values. Electron affinity is the energy absorbed (endothermic) or emitted (exothermic) by the addition of one electron ...

**Geography**

What contributions has France made to the world's culture?(Essay) Cheese. Perfume. Do you just mean now or throughout the centuries? This site may give you some ideas. http://en.wikipedia.org/wiki/High_culture This UNESCO site has a long list of the cultural sites of ...

**World Literature**

Use sparknotes. It's an amazing website.

**Spanish**

¿Qué tipo de café es?

**Science**

thanx for the help Ttt

**word unscramble**

it means, philatelist, it came up earlier in the test, lol it means someone who collects stamps... hope that helps!

**math**

You have 2 digits, 2 numbers, reverse digits and 54 if the difference and the sum of all is 10 I'm not clear what you're asking, could you clarify what the conditions are for us please? My grandson came home with the problem that he wrote out on a piece of paper. He ...