Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 39

**Biomechanics**

Olympic cross country ski champion, Henrik Henrikson, is using a new ski wax, Gripola, that is supposed to stop his ski from slipping backwards when he pushes off against the snow (it gives him a coefficient of static friction between the ski and the snow of 0.20). While skiin...

**Biomechanics**

While pushing off against the starting blocks at the beginning of a race, Olympic swimming great Michael Phelps generates a force that increases linearly from 0 N to 800 N over the first 0.30 s, and then decreases steadily back to 0 N over the remaining 0.30 s (see the graph b...

**Biomechanics**

A person with a body mass of 65 kg was running over level ground with a strong tailwind, while wearing a 10 kg weighted vest. The tailwind applied a force of 125 N to the runner’s body in the horizontal direction. Early in the stance phase, the runner generated a vertical...

**Biomechanics**

Two ice skaters start out motionless in the center of an ice rink. They then push each other apart. The first skater (mass = 80 kg) moves to the right with a velocity of 2.5 m/s. The second skater (mass = 58 kg) moves to the left at some unknown speed. If we assume that the ic...

**Maths**

The ratio of girls to boys in a class is 3:4. If 3 new girls join and 1boy leaves, what is the new ratio of girls to boys

**Algebra 1**

You had $22 to spend on four raffle tickets. After buying them you had $6. How much did each raffle ticket cost?

**ELA**

I have an 89, 83, 82, and 74 for school year. I got a 59 on final which is worth 20%. what is my average?

**5th grade math**

6/60=10 12/60=5 15/60=20

**math**

what two simpler problems can you use to find 9 times 38?

**Math**

How many combinations of hamburgers can you have with 12 toppings?

**math**

dont know

**Physics**

oh thats easy. you have to use ì. 20m/s = Velocity...a= Äv(velocity) over Ät(time) so it would be 20m/s divided by 1m/s and you get 20m/s squared and so on...hope it helps!

**math**

How many combinations of hamburgers can you have with 12 toppings?

**Science**

How do the bacteria within a deepsea tubeworm( residing near hydrothermal vents) affect the environment around them?

**MacroEconomics**

Testing procedures required by the US Food and Drug Administration raise the cost and price of drugs. Should we eliminate such requirements in order to ease inflationary pressures?

**9th E.L.A.**

I am having a discussion in clas about the film Big Fish By Tim Burton. My topic question is this- The film Big Fish explores the metaphor of the big-fish-in-a-small-pond by examining the impact Ed Bloom has had on lives he's touched throughout his life and travels. Discus...

**Geometry**

AM is a median of a triangle where A is one vertex and M is the midpoint of a side of a triangle opposite vertex A. If the distance from the centroid of the triangle to M is 5 units, how long is the median AM I have: The centroid, is the balance point, or center of gravity, of...

**Math**

so now i have.. x+13 log 2=-45 log 3..

**Math**

i subtracted x - 45 log i got x + 58.. then do i subtract the log 3 ? x + 58 log 1

**Math**

2x+13 log 2 = x -45 log 3

**Math**

2^(2x+13) = 3^(x-45)

**Math**

oo ok i got it

**Math**

im confused from what to do now..where did the 5 in the front come from?

**Math**

logbase5 x = -1.8

**Math**

(9/5) log base 5 (x) = -1

**Calc**

The Public Health Service monitors the spread of an epidemic of a particularly long lasting strain of the flu in a city of 500,000 people using the logistic function. at the biginning of the first week of monitoring (time zero), 200 cases had been reported. During the first we...

**7th grade**

What are all the language persuasive techniques

**physics **

How would I graph a collision. i.e if I have a problem A 12,000 kg railroad car traveling at a speed of 19 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? What would my x axis be and what would...

**MATHS**

Could you please help? On July 5, in the area around Center Village, there was great excitement. Six different people reported to the police that they had seen Bigfoot, the large hairy creature sometimes seen but never captured. The next day, twice as many people called the po...

**MATHS**

yes c stands for cents.

**MATHS**

YEAR 4

**MATHS**

I'm not sure what you mean.

**MATHS**

Please show the quickest way to do this question? Amanda has 20 coins in her purse. She has only 10c,20c and 50c coins, and their total value is $5. If she has more 50c than 10c coins, how many 10c has she? Thank You

**MATHS**

Could you please explain the quickest way to calculate these questions? 1)Julian's age has the same figures as his dad's with the digits reversed. The sum of their ages is 77 and Julian is 27 years younger than his dad. How old is Julian?

**5th grade Math**

960,500

**social studies**

during the civil war what state fought on the side of the confederates

**Math**

a=2

**Chemistry**

I am pretty good at balancing oxidation reduction problems, but I can't do this one: HIO3 + FeI2 + HCL -> FeCl3 + ICl + HOH 5HIO3 + 4FeI2 + 25HCl -> 4FeCl3 + 13ICl + 15HOH I separated the three redox equations, added the two oxidation reactions together, then balance...

**math**

what do you call a number that cannot be arranged into 2-row arrays? odd numbers. I learned this from Roger. 2+2=

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