Science & Mathematics - 3 November 2007

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2007-11-03 09:04:25 · 1 answers · asked by Anonymous in Mathematics

1. A baseball is thrown at an angles of 22degrees relative to the ground at a speed of 27.1m/s. The ball is caught 52.0 m from the thrower.
a) How long is it in the air?(I had the correct answer on this one which was 2.0695131 seconds)
b) How high is the tallest spot in the balls path?(I used the whole time it was up and then divided it in half to get 5.42820082m which was wrong)

2. A quarterback throws the football to a stationary receiver who is 26.7m down the field. The football is thrown at an initial angle of 36.5degrees to the ground.
a) At what initial speed must the quarterback throw the ball for it to reach the receiver?
b) What is the ball's highest point during its flight?
I had both wrong, but i dont see how i missed a when i used the same equations as above, but my answers were 18.2274788 and 13.2032173 respectively.

2007-11-03 09:01:16 · 1 answers · asked by Anonymous in Physics

My daughter asked me this this morning. I unfortunately do not know the answer.
Are there other planets in our solar system that have an ozone layer?

2007-11-03 08:59:02 · 16 answers · asked by Rosie 4 in Astronomy & Space

please tell me if this is true?

2007-11-03 08:52:59 · 4 answers · asked by TaylorMade85 2 in Zoology

which one would be legal when described by a doctor? I am not too sure really

amphetamine
barbiturate
morphine
herion

2007-11-03 08:46:55 · 23 answers · asked by Anonymous in Biology

Let f be the function defined by y = f(x)= 4 x^2

1) Find the actual change in y when x changes from 2 to 2.1

2)Use the differential dy of the function f to find the APPROXIMATE change in y when x changes from 2 to 2.1

* i don't need work, just the answer for 1 and 2 is fine

2007-11-03 08:45:28 · 2 answers · asked by diecast 3 in Mathematics

Base the approximation at x= -2pi/3

2007-11-03 08:42:18 · 1 answers · asked by diecast 3 in Mathematics

How many seconds will elapse between seeing lightning and hearing the thunder if the lightning strikes 1 mile away and the air temperature is 20degrees Celsius?

2007-11-03 08:41:12 · 4 answers · asked by RoRoStar 1 in Physics

A camel sets out to cross the desert, which is 23.9 km wide in the north-south direction. The camel walks at the uniform speed 4.26 km/hr along a straight line in the direction 35.5 ° north of East.
A) How long will it take the camel to cross the desert? Answer in units of hr.
B) Calculate the camel's eastward displacement while he crosses the desert. Answer in units of km.

Please show work.
Thanks for the help!

2007-11-03 08:41:05 · 1 answers · asked by jon s 2 in Physics

i have a question on my homework that asks me to write an equation to an ellipse when i know the major axis, which is 6 and the foci being at (0, +/-1)

everytime i solve it and i try to find out what b^2 is i keep getting some really wierd decimal and negative number.
so far i have

x^2/? + y^2/9=1

i just cant figure out how i can find b^2
please help!

2007-11-03 08:38:20 · 1 answers · asked by piper h 1 in Mathematics

Find the equation of the line tangent to the curve defined by the equation at the specified point.
x^(2/3)+y^(2/3)=2; (1,1)

2007-11-03 08:34:35 · 1 answers · asked by Matty B 3 in Mathematics

Darwins theory of evolution seems pretty water tight to me, so how come its still just a theory ? I was under the impression we had found all the bones in the chain from prehistoric apes to modern day man.
what is this "supposed" missing link ?
(please no religious answers, ...its just too far fetched)

2007-11-03 08:31:47 · 19 answers · asked by Anonymous in Biology

Light with wavelength 422 nm passes through a double-slit system that has a slit separation d = 0.400mm.Deter-mine how far away a screen must be placed so that dark fringes appear directly opposite both slits,with only one bright fringe between them.

2007-11-03 08:29:26 · 1 answers · asked by Anonymous in Physics

I'm building an egg catapult (well, giant slingshot, actually) and given the egg's drag coefficient, mass, launching angle, and initial velocity I'd like to be able to predict the range. More specifically, I'd like to be able to target specific ranges by adjusting the initial velocity. Been too long since I've had physics, so i need some help on this one! I know how to do it ignoring drag, but that is not an appropriate assumption in this case.....

Thanks!

2007-11-03 08:23:13 · 1 answers · asked by Matt 1 in Physics

2007-11-03 08:22:13 · 1 answers · asked by bamidele d 1 in Medicine

2007-11-03 08:17:27 · 3 answers · asked by bamidele d 1 in Other - Science

I ASKED SOME OF MY FRIENDS AND THEY TOLD ME THAT IN MY DREAM I MAY OF BEEN FIGHTING WITH SOMEONE OR SOMETHING.LIKE MAYBE AN ENTITY, I HAVE NO SKIN CONDITIONS, ONLY A SMALL RASH ON MY ARM BUT THE SCRATCHES ON MY FACE LOOK KINDA LIKE PAPERCUTS.OR AS IF SOMEONE JUST HAD A SHARP NAIL AND MADE A SCRATCH.

2007-11-03 08:17:25 · 25 answers · asked by HARBOR AREA310 1 in Paranormal Phenomena

was it sedative? I am not too sure
thanks if you can tell me what it is! :D

2007-11-03 08:15:02 · 6 answers · asked by Anonymous in Biology

I have never understood this. shouldnt it be warmer? Why does this happen ?

2007-11-03 08:13:07 · 5 answers · asked by sshhmmee2000 6 in Geography

2007-11-03 08:10:39 · 6 answers · asked by Anonymous in Mathematics

Anyone here read the news? Around the world, honey bee are disappearing. This will have a negative impact considering the fact that honeybees pollinate a third of our food, including almost all fruits and vegetables.

http://www.nydailynews.com/entertainment/tv/2007/10/27/2007-10-27_bees_get_some_bad_buzz_on_nature.html?ref=rss

What's your thought on this?

2007-11-03 08:09:21 · 2 answers · asked by Anonymous in Zoology

I see them doing it under my birdfeeders by the pond. Sometimes the duck being chased just calmly walks away and the chaser does too and sometimes the one being chased zooms off into the air like it's scared. The chaser often looks like it is snapping at the other one, trying to bite the other's tail. Usually it's a male doing the chasing of other males, but not always. Can anyone give an explanation of this, please?

2007-11-03 08:08:49 · 7 answers · asked by BlueManticore 6 in Zoology

2007-11-03 08:08:02 · 13 answers · asked by Anonymous in Biology

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.05 x108 kgm2. A crew of 150 are living on the rim, and the station's rotation causes the crew to experience an acceleration of 1 g (Fig. P11.40). When 100 people move to the center of the station for a union meeting, the angular speed changes. What acceleration is experienced by the managers remaining at the rim? Assume that the average mass of each inhabitant is 65.0 kg.

Comet Halley moves about the Sun in an elliptical orbit, with its cloest approach to the Sun being about 0.580 AU and its greatest distance from the sun being about 35.0 AU (1 AU = the average Earth-Sun distance). If the comet's speed at its closest approach is 54.0 km/s, what is its speed when it is farthest from the Sun?
The angular momentum of the comet about the Sun is conserved b/c no torque acts on the comet. The gravitational force exerted by the sun on the comet has a moment arm of ____.

2007-11-03 08:03:39 · 2 answers · asked by ひいらぎ 5 in Physics

2007-11-03 08:02:39 · 5 answers · asked by Anonymous in Physics

Full Question:
http://img155.imageshack.us/img155/9779/14336347bq9.gif

This one seems pretty tricky to me atleast

2007-11-03 08:01:09 · 2 answers · asked by jay d 1 in Mathematics

You are organizing a three-day back-country ski trip to Roger’s Pass for students in an outdoor club at St. Mary's College. You have approached two local busing companies for group cost information. The companies have presented you with their cost proposals for round-trip group travel:

Company A: $55 per person for a group of up to 40 students

Company B: $60 per person for a group of up to 25 students, with a discounted rate of $45 per person for each additional person in larger group size of between 25 and 40.

Let x denote the number of students who are considering participating in this trip. Let the function A(x) represent the total cost of the trip with company A and let B(x) represent the total cost of the trip with company B.

a)Determine the algebraic formulas for A(x) and B(x) for a domain of [0, 40].

b)For what value of x (number of students traveling) is the total cost the same for both companies?

2007-11-03 07:59:04 · 2 answers · asked by sweet_pomelo 2 in Mathematics

how many molecules are in18 g of each of the following substances?
1-CO
2-N2
3-P4
4-P2
Do parts and contain the same number of atoms of phosphorous?


***There are 20 drops in 1 ml of water which weights one gram suppose one drop of water evaporates in one hour how many water molecules evaporate per second?

2007-11-03 07:57:37 · 1 answers · asked by mohamed r 1 in Physics

how would the observation for rutherfords experiment be expected to change if thicker metal foil were used?

2007-11-03 07:56:30 · 1 answers · asked by Anonymous in Chemistry

and was wondering if there have been any reported attacks on humans?

2007-11-03 07:52:33 · 7 answers · asked by Anonymous in Zoology