Science & Mathematics - 5 November 2007

2007-11-05 12:29:10 · 6 answers · asked by ~future scientist~ 1 in Astronomy & Space

You and your friend throw balloons filled with
water from the roof of a several story apart-
ment house. You simply drop a balloon from
rest. A second balloon is thrown downward
by your friend 2.3 s later with an initial speed
of 45.08 m/s. They hit the ground simultane-
ously.
The acceleration of gravity is 9.8 m/s2 : You
can neglect air resistance.
How high is the apartment house? Answer in m

2007-11-05 12:29:05 · 2 answers · asked by Handiman 3 in Physics

2007-11-05 12:28:26 · 3 answers · asked by Anonymous in Weather

the integral is :

e^(-8000t) * [cos(6000t) + 2sin(6000t)] dt

thanks in advance!

2007-11-05 12:27:44 · 2 answers · asked by Anonymous in Mathematics

? thanks

2007-11-05 12:27:36 · 2 answers · asked by Anonymous in Physics

x = csc (theta)

y = sin (theta)

2007-11-05 12:26:40 · 1 answers · asked by Anonymous in Mathematics

2007-11-05 12:23:56 · 1 answers · asked by Anonymous in Chemistry

Your teacher allows the class to have a pizza party. The pizza parlor is running a special: The first pizza in an order costs $15.99, the second (in the same order) costs half the price of the first, the third pizza costs half the price of the second, the fourth cost half the price of the third, and so on. If your class can only buy whole pizzas and has exactly $31.74 to spend (excluding tax and tip), what is the greatest number of pizzas that the class can purchase? Explain your reasoning.

2007-11-05 12:23:25 · 2 answers · asked by Anonymous in Mathematics

2007-11-05 12:23:18 · 24 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-05 12:22:57 · 2 answers · asked by Steph M 1 in Physics

2007-11-05 12:22:42 · 8 answers · asked by Anonymous in Earth Sciences & Geology

A car starting from rest moves with constant acceleration of 3.1 m/s^2 for 13 s, then travels with constant speed for another 19 s, and then finally slows to a stop with constant acceleration of -8.5 m/s^2. How far does it travel in meters?

Steps please. Thanks =)

2007-11-05 12:22:28 · 1 answers · asked by kickitup21 1 in Physics

best answer to first correct response

2007-11-05 12:20:14 · 5 answers · asked by Anonymous in Mathematics

The apothegm of a regular pentagon is 10.8 centimeters.
what is the radius of the circumscribed circle?
what is the length of a side of the pentagon?
what is the perimeter of the pentagon?

2007-11-05 12:20:12 · 1 answers · asked by jumba 1 in Mathematics

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.20 and the push imparts an initial speed of 4.0 m/s?

2007-11-05 12:19:35 · 1 answers · asked by Anonymous in Physics

The compliment of a graph G is a having the same vertex set as G but consisting of exactly those edges that are not edges of G. ( If AB is an edge of G, then it is not an edge in the compliment and vice versa. Let N denotes the number of vertices in G.
a) Suppose N is even (N is greater than or equal to 4) and G has an Euler Circuit. Explain why the compliment of G can not have an Euler circuit.
b) Suppose N is odd (N is greater than or equal to 5) and has an Euler circuit. Explain why the compliment of G may or may not have not have a Euler circuit.

2007-11-05 12:18:15 · 1 answers · asked by Anonymous in Mathematics

answer!!

2007-11-05 12:18:11 · 2 answers · asked by I'm waiting on my big miracl 2 in Earth Sciences & Geology

I have no directions it was in my Mothers things and It did not reset it self at the time change it has the date,day, moon sign and indoor weather and a alarm

2007-11-05 12:17:42 · 5 answers · asked by Jeanie H 1 in Astronomy & Space

Suppose that the speed of a ball moving in a horizontal circle is increasing at a steady rate. Is this increase in speed produced by the centripetal acceleration? Explain

2007-11-05 12:17:38 · 1 answers · asked by Anonymous in Physics

(Again, not using this for homework but studying purposes, thanks) Also, I got the answer to the first part, just wondering about the second part.

A star has a mass of 1.40X10^30kg and is moving in a circular orbit about the center of its galaxy. The radius of the orbit is 3.9x10^4 light years (1 light year = 9.5 X 10^15m), and the angular speed of the star is 2.1X10^-15 rad/s. (a) Determine the tangential speed of the star. (b) What is the magnitude of the net force that acts on the star to keep it moving around the center of the galaxy?

The tangential speed = 7.8X10^5 m/s
and assuming you need the radius for (b), it works out to be 3.7X10^20m

2007-11-05 12:17:17 · 1 answers · asked by a.pasternak 2 in Physics

2007-11-05 12:16:44 · 18 answers · asked by Kyle 1 in Physics

[Assume that each is equally likely to be born on any of the 365 days of the year, i.e. no one is born on Feb. 29 in a leap year.]

2007-11-05 12:13:17 · 4 answers · asked by Kent H 1 in Mathematics

2007-11-05 12:12:03 · 4 answers · asked by jim m 5 in Engineering

Okay, I have no idea how to do my homework, and it's embarrassing because this is just review. Anyway, here are the problems that I am struggling with: _____% of 40=10
And the other one is 67% of _____=80.
I don't want the answers please, I'd really like to know how to do them so that I can do the rest of my homework before tomorrow. Thank you.
-R

2007-11-05 12:10:09 · 7 answers · asked by Rin 1 in Mathematics

Does anyone know where we can find plans online for a Tesla anti-gravity machine. Please provide a link. Thank you.

2007-11-05 12:04:51 · 3 answers · asked by dlln5559 2 in Physics

1. 18
2.120
3.56
4.390
5.144
6.153

2007-11-05 12:02:58 · 8 answers · asked by Anonymous in Mathematics

I just moved to a new house sorta in the country and sometimes at night I see all sorts of stars in the sky buy I cannot tell while constellations I'm looking at. Is their a way to determine this anyhow?

2007-11-05 12:02:56 · 5 answers · asked by jerry 1 in Astronomy & Space

2007-11-05 12:01:00 · 4 answers · asked by jong 1 in Zoology

What are all the posiblites to make 16?

2007-11-05 11:57:35 · 8 answers · asked by Anonymous in Mathematics

i heard a sound once while i was asleep,a woman was talking..i thought that it was me myself.so i touched my lips it wasnt me..it was near..just behind my ear ,i got up and listend someone was telling me..help me back to life..i want to live..help me back to world...

2007-11-05 11:55:26 · 15 answers · asked by aNni 1 in Other - Alternative