Science & Mathematics - 7 October 2007

Hello,
i wish someone give me an answer.
how can i find the corruct formula for calculating the Corrugated Cardboard square meter (area)?

2007-10-07 14:46:04 · 2 answers · asked by sam a 1 in Engineering

Like...hatch-and-go?

2007-10-07 14:45:30 · 5 answers · asked by queequeg1025 2 in Zoology

The determined coyote is out once more in pursuit of the elusive roadrunner. The coyote wears a pair of Acme jet-powered roller skates, which provide a constant horizontal acceleration of 13.0 m/s2 (Fig. P4.65). The coyote starts at rest 70.0 m from the brink of a cliff at the instant the roadrunner zips past him in the direction of the cliff.

Figure P4.65

(a) The roadrunner moves with constant speed. Determine the minimum speed he must have so as to reach the cliff before the coyote.
m/s
(b) At the edge of the cliff, the roadrunner escapes by making a sudden turn, while the coyote continues straight ahead. The coyote's skates remain horizontal and continue to operate while he is in flight so that his acceleration while in the air is (13.0 - 9.80) m/s2. The cliff is 100 m above the flat floor of a wide canyon. Determine where the coyote lands in the canyon.

Your answer differs from the correct answer by 10% to 100%. m (from base of cliff)
(c) Determine the components of the coyote's impact velocity. (Assume right is the positive x direction and up is the positive y direction.) vx = m/s
vy = m/s

2007-10-07 14:42:59 · 1 answers · asked by Anonymous in Physics

A person standing at the top of a hemispherical rock of radius R = 13.00 m kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity vi as in Figure P4.62.

Figure P4.62

(a) What must be its minimum initial speed if the ball is never to hit the rock after it is kicked?
m/s
(b) With this initial speed, how far from the base of the rock does the ball hit the ground?

2007-10-07 14:42:07 · 1 answers · asked by Anonymous in Physics

Solve the equation:
p^2 + (p + 9)^2 = 45

Any idea as to how to do this? Please help!

Thank you so much!!!

2007-10-07 14:40:58 · 5 answers · asked by DoWHATiDO 3 in Mathematics

2007-10-07 14:39:35 · 3 answers · asked by Anonymous in Other - Science

i might buy a star how do u do that and how much

2007-10-07 14:37:49 · 10 answers · asked by Anonymous in Astronomy & Space

Okay.. so lets say theres this friend of mine that smokes weed. And she is being drug tested in a week... will she drop dirty? How long does it take to drop clean?

2007-10-07 14:36:53 · 3 answers · asked by Anonymous in Medicine

solve for x. One of the answers is _?_

6x^2-17x-14=0

2007-10-07 14:36:51 · 7 answers · asked by Anonymous in Mathematics

A 120 kg refrigerator is 80 cm square (whats that mean) and 2 meters tall. the coefficient of friction between the fridge and the floor is .25. How much force will it take to push it across the floor upright position? How much force if it's laid on one side? All I know is I have to use the Ff formula but what baffles me is how to get a Newton into the formula. Plz help, I know I have to know this for a test.

2007-10-07 14:34:29 · 5 answers · asked by Anonymous in Physics

Two rain storms occurred in one week in a certain area. In the first rainstorm 25ML of rain fell per hour, and in the second rainfall 40ML of rain fell per hour. RAin fell that week for a total of 70 hours for a total rainfall of 2200ML. How long was each of the two rainstorms?

2007-10-07 14:33:41 · 1 answers · asked by rebeccapolsh333 2 in Chemistry

How do each of you think about the male and female genders? What are your opinions and how would you describe them?

2007-10-07 14:32:17 · 3 answers · asked by somebody 1 in Biology

If so what? If not why do the always tell you that you shouldn't?

2007-10-07 14:14:53 · 10 answers · asked by n8boi02 3 in Astronomy & Space

Find the derivative of

f(x)= 8e^x/(e^x)+1

2007-10-07 14:12:38 · 1 answers · asked by Lauren 1 in Mathematics

i saw it in the answer to a chemistry question about dissolving Teo2 in SiO2- supposedly you can do that by dissolving the TeO2 in H2SO4, then doing a base wash- what's this mean tho?

2007-10-07 14:11:05 · 2 answers · asked by Pkizzle 2 in Chemistry

There was no drought. This is a rainforest.

2007-10-07 14:09:31 · 2 answers · asked by Anonymous in Botany

When NaOH(aq) and CaCO3(aq) are mixed what recipitate forms and what color

same question with
NaOH and KCl
NaOH and K2CrO4
CaCO3 And KCl
CaCO3 and AgNO3
CaCO3 And K2CrO4
KCl And K2CrO4
AgNO3 and K2CrO4

I am having trouble making my table of knowns for a qualitative analysis lab, if someone could do at least some of these it would be very helpful.

2007-10-07 14:09:23 · 1 answers · asked by daniel T 3 in Chemistry

I'm having one taken to see if i have high cholesteral. Will having smoked marijuana affect the test in any way?

2007-10-07 14:08:10 · 2 answers · asked by melanie 1 in Medicine

2007-10-07 14:07:52 · 25 answers · asked by Anonymous in Mathematics

Suppose that the cost function for a product is given by C(x) =.002^3 -9x + 4000.
Find the production level that will produce the minimum average cost per unit.

2007-10-07 14:06:03 · 1 answers · asked by Doug 1 in Mathematics

I need to identify a leave from this vine and it has five leaflets. It has teeth that aren't doubled and it dark green.

2007-10-07 14:00:32 · 2 answers · asked by justkinding 2 in Botany

if Heat is transferred from the system to teh surrounding then

A. Q (of system) is postive
B. Q (of system) is negitive
C. the system is doing work
D. the surrounding are doing work

2007-10-07 14:00:18 · 2 answers · asked by Anonymous in Chemistry

what's the difference between all three of those birds? and can any one link me to a visual source as well?

2007-10-07 13:59:07 · 7 answers · asked by Anonymous in Zoology

What are the components and length of a vector which is the sum of the two vectors, V1 and V2, whose components are (2.2, 2.0, 0.0) and (4.9, -4.1, -0.4)

components (____),(____),(_____).

Length (____)

I can get the components but the lenght will not come out for me

2007-10-07 13:55:52 · 1 answers · asked by Albert treeter 2 in Physics

help asap..i need this for tomorrow!! pleasee!

2007-10-07 13:55:29 · 2 answers · asked by (: 1 in Biology

ty to who helped me with 1 and 2! I was able to get to 9 (this number), hopefully i can get to 16 after this.

please help me understand what to do. i see my knowns are m=45 kg, speed=50m/s. I dont know what the period of acceleration is used for though...

A golf ball with a mass of 45 g is struck by a club, leaving the tee with a speed of 1.8 * 10² km/h. The period of acceleration was 0.50 m/s.

a) What is the average acceleration on the ball as it was struck (in m/s²)?

b)What is the froce exerted on the club?

c)What is the force exerted on the club by the ball?

2007-10-07 13:49:29 · 3 answers · asked by iSmile 2 in Physics

If you have a bag that has 4 red marbles, 6 blue, and 5 green. If someone takes out one marble and doesnt replace it and picks out anothjer one what is the probablilty that you can pull out a green one first and then a blue one? how do you do this problem? Thanks in Advance!!

2007-10-07 13:48:56 · 3 answers · asked by Brittany l 2 in Mathematics

explain static and dynamic balancing

and

explain conservation of mass. refer to vinegar and baking soda experiment.



thankss!! :)

2007-10-07 13:48:30 · 1 answers · asked by nelliekellibelly 2 in Chemistry

2007-10-07 13:48:09 · 3 answers · asked by Alex 2 in Medicine

When 0.50 moles of lithium is reacted with excess nitrogen, 0.15 moles of lithium nitride are formed. What is the percent yield of the reaction? I got 90%, but teacher said 30%. Please verify

2007-10-07 13:44:34 · 1 answers · asked by Chuck 1 in Chemistry