Wednesday

February 22, 2017
Total # Posts: 13

**Math**

Calculate the morality of a solution made by mixing 250ml of 0.75M H2SO4 with 400ml of 2.5MH2SO4

*March 26, 2013*

**AP physics**

these are all wrong :(

*May 10, 2012*

**AP physics**

A 1280-kg car starts from rest and accelerates to 80 km/h in 23.0 s. Friction exerts an average force of 449 N on the car during this time. (a) What is the net work done on the car? J (b) How far does the car move during its acceleration? m (c) What is the net force exerted on...

*May 10, 2012*

**AP physics**

I have never used these equations before, can you explain/ show me

*May 10, 2012*

**AP physics**

A 1.60-g bullet, moving at 542 m/s, strikes a 0.249-kg piece of wood at rest on a frictionless table. The bullet sticks in the wood, and the combined mass moves slowly down the table. (a) Find the speed of the combination after the collision. m/s (b) Find the kinetic energy of...

*May 10, 2012*

**physics**

both of these answers a- 280J and b-46.4m/s are wrong?

*May 10, 2012*

**world history**

the answer is a women

*February 11, 2011*

**Statistics 250**

If you roll a die 38 times and 12 of the rolls result in a "5," what empirical probability was observed for the event "5"?

*March 18, 2010*

**Statistics 250**

The NCAA men's basketball season starts with 327 college teams all dreaming of making it to "the big dance" and attaining the National Championship. Sixty-four teams are selected for the tournament, and only one wins it all. (Assume that every team has an equal ...

*March 18, 2010*

**Statistics 250**

For the past 20 years, the high temperature on April 15th has averaged µ = 62 degrees with a standard deviation of σ = 4. Last year, the high temperature was 72 degrees. Based on this information, last year's temperature on April 15th was the following. a. far ...

*March 18, 2010*

**Statistics 250**

In a normal distribution, what z-score value separates the highest 90% of the scores from the rest of the distribution? a)z = -1.28 b)z = 1.28 c)z = -0.13 d)z = 0.13

*March 18, 2010*

**Statistics 250**

Final averages are typically approximately normally distributed with a mean of 65 and a standard deviation of 8. Your professor says that the top 10% of the class will receive an A; the next 20%, a B; the next 41%, a C; the next 19%, a D; and the bottom 10%, an F. (Give your ...

*March 18, 2010*

**science**

Suppose if u were a teacher and you are telling the student to to write about the chemical element .What would you tell them to write about that chemical element?

*October 12, 2009*

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