Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 28

**statistics**

the subway train has 18 doors and starts with 15 passenger. if each passenger is equally likely to get off at any station and the passengers leave the train independently, find the probability that 2 or more passengers leave the train through the same door

**MAT 116**

how do I write the expression and then solve it four square dived by two square?

**math**

If the store purchases an item at a wholesale cost of $3.50 per item, and it is sold at a retail value of $5.00 per item. What is the gross profit percentage of the item? (formula: gross profit percentage = [(retail - cost) divided by retail] X 100 )

**chemistry**

How many grams of each substance are needed to prepare th e following solutions? 50.0 ml of 8.0%(w/v)KCL

**statistic**

roll 2 standard dice and add the numbers. what is the probability of getting a number larger than 9 for the first time on the third roll?

**Physics - urgent**

Oh okay, thank you, now I get the correct answer for c, but b is still not working out, could you please help me with that?

**Physics - urgent - due tomorrow**

please, I honestly keep trying to look at the problem from different points of view, but nothing is working out; I'm running out of ideas as to how I can approach and still, I'm not getting the right answer or understanding drwls' answers...

**Physics - urgent, please**

Please, I've been trying to solve this problem for hours and I still can't get the correct answer, I would really appreciate some more help with this.

**Physics - urgent**

I already asked this and was given an answer, but I don't fully understand it and so would like a further explanation. What I asked was... An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel t...

**Physics - important**

Won't the kinetic energies for question b and c be the same?

**Physics - important - really confused**

Also, is there a final kinetic energy? I'm just really confused by this...

**Physics - important**

Oh, and what do you mean by 'x'?

**Physics - important**

Should the answer for B be 1.5x10^6 m/s because my book says it's wrong...

**Physics - important**

An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel to the electric field. a) Calculate the work done on the electron by the field when the electron has travelled 2.5 cm in the field. b) Calculate...

**Physics - urgent help needed**

Please, please, please, this is the first question of many and I don't get it.

**Physics**

An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel to the electric field. a) Calculate the work done on the electron by the field when the electron has travelled 2.5 cm in the field. b) Calculate...

**Physics**

thank you! :)

**Physics**

Particle A has a mass of 2 and a charge of -1. Particle B has a mass of 2 and a charge of +1. Are particle A and B necessarily antiparticles? Explain your answer.

**Physics**

Particle A has a mass of 2 and a charge of -1. Particle B has a mass of 2 and a charge of +1. Are particle A and B necessarily antiparticles? Explain your answer. I don't think so, but I'm not sure how I can explain why.

**Spanish**

Which tense are you supposed to be using?

**physics**

What particles are made with two quarks, and what restrictions are there on the two quarks in it? I'm pretty sure it's mesons, but I don't know the restrictions. What particles are made with three quarks and what restrictions is there on the three quarks? Again, I ...

**physics**

calculate the escape velocity for the following; assume a launch from the surface. A space probe leaving the moon to come back to Earth. A moon mission lander leaving the moon to come back to Earth. A spaceship leaving the solar system.

**physics**

oh okay, thank you very much. :)

**physics**

Also, I think I've found the first velocity, but would I disregard that when finding the velocity at point B?

**physics**

I tried doing that; can you please explain. Wait, so, would the first velocity be mgh=1/2mv^2 and then I take away the m's?

**physics**

I have a diagram of a roller coaster. It starts at a height of 100m where the v=0, it then drops completely to the ground and then goes into a loop that is 75m high; the point where the loop starts is point A. From the loop, the track raises to e height of 50m (this is point B...

**Jewelry markings**

I have purchased a thrift item...a bronze or brass, styalilzed, shaped bracelet, marked with an anchor with the letters S C on either side of the anchor shank. There is not ring on the top of the anchor. There are hooks on the tips of the anchor.

**Jewelry markings**

I have purchased a thrift item...a bronze or brass, styalilzed, shaped bracelet, marked with an anchor with the letters S C on either of the anchor shank. There is not ring on the top of the anchor. There are hooks on the tips of the anchor.

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