Science & Mathematics - 18 October 2006

2006-10-18 11:11:50 · 3 answers · asked by goring 6 in Physics

A man stands on the roof of a building of height 16.6 m and throws a rock with a velocity of magnitude 31.1 m/s at an angle of 27.3' above the horizontal. You can ignore air resistance.
*The maximum height above the roof reached by the rock: 10.4 m
*Take free fall acceleration to be 9.80 m/s^2

A) Calculate the magnitude of the velocity of the rock just before it strikes the ground.

B) Calculate the horizontal distance from the base of the building to the point where the rock strikes the ground.



**please show how you got your answer!! THNX!!!**

2006-10-18 11:11:25 · 1 answers · asked by Dana 1 in Physics

2006-10-18 11:11:25 · 4 answers · asked by Lisa H 2 in Other - Science

On the periodic tableof Elements the two lines of elements at the bottem what family are they in o;r where can i find out wat period group and family they are in?

2006-10-18 11:11:08 · 7 answers · asked by tiffa63384 2 in Other - Science

2006-10-18 11:11:02 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-18 11:10:06 · 5 answers · asked by Anonymous in Mathematics

2006-10-18 11:08:05 · 6 answers · asked by lifeisshort 1 in Biology

There are five #s: a, b, c, d & x. The mean of a, b, c, & d is 80. If the mean of all five #s is 120, what is x?

2006-10-18 11:07:57 · 4 answers · asked by gigi_victory 3 in Mathematics

2006-10-18 11:07:04 · 5 answers · asked by Bob 3 in Mathematics

2006-10-18 11:06:56 · 17 answers · asked by strings 1 in Medicine

I heard it happens when they're exposed to moonlight....

2006-10-18 11:03:07 · 7 answers · asked by jfnelson61 2 in Botany

2006-10-18 11:01:49 · 5 answers · asked by Anonymous in Astronomy & Space

Would the surviving object be expelled by earth or travelling with its own motion as at the moment of impact?

2006-10-18 11:00:52 · 5 answers · asked by strings 1 in Other - Science

I've heard about it quite a lot on the news recently but havent seen it on a map - is it in europe? Near Macedonia somewhere?

2006-10-18 10:54:01 · 18 answers · asked by Apollo C 2 in Geography

For which of the following functions is f(a + b) = f(a) + f(b) for all positive numbers a and b?

a) f(x) = x^2
b) f(x) = x +1
c) f(x) = sqrt x
d)f(x) = 2/x
e)f(x) = -3x

2006-10-18 10:53:36 · 4 answers · asked by Jason A 1 in Mathematics

how long would it take before all the humans and animals used up all the oxygen in the atmosphere, and we all died?

2006-10-18 10:48:35 · 11 answers · asked by Anonymous in Earth Sciences & Geology

One of my favorite medical education sites in is the national center for emergency medicine informatics web site, ncemi.org. Lately I have been unable to get on. Anyone know what happened?

2006-10-18 10:48:05 · 2 answers · asked by mark the nurse 2 in Medicine

Sprinting near the end of a race, a runner with a mass of 65 kg accelerates from a speed of 6 m/s to a speed of 7 m/s in 2 s.

(a) What is the runner's average acceleration during this time?
m/s2

(b) To gain speed the runner produces a backward force on the ground, so that the ground pushes the runner forward providing the force necessary for acceleration. Calculate this average force.
N

The air exerts a forward force of 10 N on the propeller of a 0.40 kg model airplane. If the plane accelerates forward at 4.0 m/s2, what is the magnitude of the resistive force exerted by the air on the airplane?
N


A boat moves through the water with two forces acting on it. One is a 1500 N forward push by the motor, and the other is an 1100 N resistive force due to the water.

(a) What is the acceleration of the 900 kg boat?
m/s 2

(b) If it starts from rest, how far will it move in 6.0 s?
m

(c) What will its velocity be at the end of this time?
m/s

2006-10-18 10:48:01 · 2 answers · asked by ckielblock18 1 in Physics

2006-10-18 10:47:54 · 13 answers · asked by albaloo47 1 in Other - Science

2006-10-18 10:47:53 · 9 answers · asked by ---- 2 in Mathematics

Where did he get that from and why is it considered today in cosmology?

2006-10-18 10:46:57 · 5 answers · asked by goring 6 in Physics

In there optimum mass what has the greatest tensile durability, glass or plastic?

2006-10-18 10:46:19 · 15 answers · asked by strings 1 in Other - Science

James Mitchner claims in "Centennial" that a first set of mountains rose, erroded, and these Rockies are the second such uplift. Is this true?

2006-10-18 10:44:51 · 4 answers · asked by dogg909 1 in Earth Sciences & Geology

which types of atoms generally combine using covalent bonds?
is it non-metal atoms....?

4 properties of many molecular compounds?

2006-10-18 10:43:06 · 3 answers · asked by Anonymous in Chemistry

Ice is clear when in its pure state.
What is the coldest lowest temperature colour when in its pure state.

2006-10-18 10:42:40 · 5 answers · asked by strings 1 in Other - Science

INCLUDE:

* His biography
* Life studies
* Accomplishments
* Ideas

2006-10-18 10:42:40 · 4 answers · asked by Anonymous in Other - Science

I have to write a story about 2 kids trick-or-treating. How would i make a calculus stopry out of it?

I thought i could do something like .
There were 54 house in the neighborhood.
Mike traveled 4 house / 5 minutes
Jake traveled 2 house / 5 minutes.

What other information do i need to add to the story?
What should the question be?
How would u slove this?

Thanks!

2006-10-18 10:42:29 · 1 answers · asked by pvhoopster 1 in Mathematics

Because we can obtain this curve by the simple procedure of flipping a coin, our gaussian/normal distribution curve/bell curve can be said to represent the law of averages.
If we accept this law as being ultimately inviolable, then one could argue that it is the most powerful force in the universe.
Because we encounter this mathematical form so often in nature, it seems surpising that it is defined by our two most important mathematical constants. Also f(sq.rt.2) = 1/e.
Thus pi, e and the law of averages, welded together in this way, can be said to represent a central and 'immortal' form.

e's role in this form is fairly clear, but why is pi there? The fact that pi arises in integrating f(x) we know, but is there a simple, logical reason for its presence?

Please, all suggestions welcome.

2006-10-18 10:41:36 · 1 answers · asked by Martin F 6 in Mathematics

2006-10-18 10:41:11 · 6 answers · asked by Anonymous in Medicine

IN OTHER WORDS, CAN A SOLID SUPERIMPOSE ON ANOTHER SOLID AS WAVES(ENERGIES) DO,IF IT IS GIVEN THAT ENERGY AND MATTER ARE DIFFERENT ASPECTS OF THE SAME PHYSICAL QUANTITY AND HENCE ARE INTERCONVERTIBLE.

2006-10-18 10:40:06 · 5 answers · asked by Hemant 2 in Physics