Physics - September 2007

2007-09-19 10:43:49 · 8 answers · asked by pinky 1

If a velocity-time curve is a straight line parallel to the t-axis, what can be deduced about the acceloration

2007-09-19 10:42:30 · 2 answers · asked by Anonymous

2007-09-19 10:39:03 · 2 answers · asked by Anonymous

F**king 10 pts to anyone who gets it rite

2007-09-19 10:36:22 · 1 answers · asked by Anonymous

The equation for linear s.h.m is

a = -(constant)x

(a) what units does the constant have?
(b) Two s.h.m.s, A and B are similar except that the constant in A is nine times the constant in B. Describe how these s.h.m.s differ.

2007-09-19 10:31:44 · 2 answers · asked by Jezza 2

I understand that if an object sits on a table, the Normal force presses against the bottom to cancel out the force of gravity from above, and that the Normal force will increace to account for additional forced on the object from above (e.g. a person pressing on it)...

but how/why does this occur? It seems so obvious that it eludes me....

thanks :)

2007-09-19 10:24:57 · 2 answers · asked by Anonymous

1)A bus slows down uniformly from 72.1 km/h to 0 km/h in22.6 seconds.How far does it travel before stopping ?answere in units of m.
range betwee{168.333-275.283}

2)A car accelerates from rest at -3.05 m/s squared.
a)What is the velocity at the end of 6.4 seconds?answere in unit m
Range {-31.52 to -8.241}
b)What is the displacement after 6.4 seconds?answere in units of m
Range {-126.08 to -16.64}

3)A car traveling at 7.1 m/s acclerates 2.2 m/s squared to reach a speed of 11.0 m/s.
How long does it take for this acceleration to occur ?answere in units of s.
Range {0.568182 -5}



Thank you so much.I need the help and i need to get this homework done .

2007-09-19 10:24:45 · 1 answers · asked by 09chick 1

So: aA+ bB+ C = 0. A,B, and C are valued: (16,-99), (-99,31) and (16,35). How do I find a and b?

2007-09-19 10:20:11 · 1 answers · asked by Dean S 1

1. Tom and Leo jogged together for about 1 hr at the speed of 5 mph. After that, Tom jogged faster by 1 mph and Leo jogged slower by 1 mph. How long will it take them to be 1 mile apart, after they started jogging at different speeds ?

2007-09-19 09:40:42 · 1 answers · asked by JuJu Beanz 1

Which if the following is an accurate statedment?

a.) the magnitude of a vector can be zero even though one of its components is not zero.

b.)the magnitude of a vector is independent of the coordinate system used.

c.) even though two vectors have unequal magnitudes, it is possible that their vectors sum is zero

d.)Rotating a vector about an axis passing through the tip of the vector does not change the vector

e.) it is possible to add a scalar quantity to a vector

2007-09-19 09:19:24 · 1 answers · asked by Alex M 1

I understand the chemical reaction that fire is but i dont how what the actual flame is!

Plasma maybe?

Thanks in advance!

2007-09-19 09:17:24 · 3 answers · asked by risc19 2

According to wikipedia, the button cell's voltage is 1.5V to 3V and the AA battery's voltage is 1.5V. Why is it that button cells can have as much voltage as something much bigger?

2007-09-19 09:11:51 · 2 answers · asked by Elf Asura 2

What physical property of metals explains this observation?
What uses does this property have?

I'll award best awnser =]

2007-09-19 08:59:44 · 5 answers · asked by meghan♥ 4

A small ball rolls horizontally off the edge of a tabletop
that is 1.20m high. It strikes the floor at a point 1.52m horizontally from the table edge. (a) How long is the ball in the
air? (b) What is its speed at the instant it leaves the table? Show and explain your work. Thanks :)

2007-09-19 08:47:36 · 1 answers · asked by Anonymous

"Two locomotives approach each other on parallel tracks. Each has a speed of v = 70 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?"

2007-09-19 08:19:39 · 3 answers · asked by Brooke B 1

Is the ball going fastest when it leaves the pitcher's hand and slows down til it hits the catcher's glove, or is there a bell curve on the velocity?

2007-09-19 07:49:10 · 4 answers · asked by crocolyle10 3

and how do we calculate k the force constant, and is k the same for the same spring?

2007-09-19 07:43:22 · 3 answers · asked by arabian_kisses08 2

When Alicia and Zoe ride a carousel, Alcia always selects a horse on the outside row, whereas Zoe prefers the row closest to the center. These rows are 19 ft 3 in and 13 ft 11 in from the center, respectively. The angular speed of the carousel is 2.4 revolutions per minute. What is the difference, in miles per hour, in the linear speeds of alicia and Zoe?

I got something like 2.193, but the book says it is .92. Help please! I'll pick a best answer TODAY!!!!!!

2007-09-19 07:14:47 · 4 answers · asked by James J 2

(b) Express the speed 15.0 m/s in mi/h. thank you

2007-09-19 07:06:49 · 2 answers · asked by Anonymous

where e is the charge on an electron. If the dipole moment of the molecule has a magnitude of p=6.2*10^-30 C*m, what is the seperation(a) between the two charges?

2007-09-19 07:03:18 · 1 answers · asked by Anonymous

what are the SI units of the constant g? Thank you

2007-09-19 06:54:09 · 2 answers · asked by Anonymous

Thank you. Didn't have many characters to work with so sorry if it's a bit unclear. Basically By using SI unit analysis I need to know if that equation is dimentionally correct.

2007-09-19 06:51:25 · 2 answers · asked by Anonymous

you have found three metal bars all painted white. one bar is a magnet, one is made from copper and one is a pice of iron. using nothing else how can you fing out which is which

2007-09-19 06:48:15 · 5 answers · asked by Anonymous

2007-09-19 06:33:46 · 5 answers · asked by Anonymous

I believe in evolution, cause and effect and I accept most of the mainstream theories of theoretical physics just as much as any scientist. I also believe that intelligent design is a possibility. How does evolution disprove God?
Most of the out spoken atheist have a knee jerk reaction to that theory. They also claim they believe in science but most physists actually believe in God or are agnostics. The angry atheist also claim science uses verifiable facts. That's wrong. Parallel universe, multiple dimension and most of quantum physics theories haven't been proven except through reason. There is also reason behind intelligent design. The big one is 'we're here'. I'm tired of the Angry atheist kindergarten arguments for why they don’t believe in the possibility of God. Grow up. Comparing leprechauns and Santa clause to a god that created the universe?

2007-09-19 06:25:25 · 12 answers · asked by wisemancumth 5

A small black rubber ball (radius 0.1 m) is placed at the top of a large white hemispherical dome (radius 10 m). The ball is slightly displaced and allowed to fall/roll/slide down the side of the dome. Calculate the arc length of the skid marks left on the dome’s surface.

Coefficient of friction (static & kinetic), μ = 1
Mass moment of inertia of a sphere, I = 2/5 * m*r^2

2007-09-19 06:21:55 · 2 answers · asked by Dr D 7

i have to do a science research project... my topic is the nuclear reactor (Enrico Fermi). the topic has to basically explain what it is from Enrico Fermi's (a scientist) point of view. i only have one week to come up with my poster sketch...

2007-09-19 06:17:56 · 4 answers · asked by JJ 2

2007-09-19 06:16:12 · 1 answers · asked by Jacques 2

At what rate must a cylindrical spaceship rotate if occupants are to experience simulated gravity of 0.60g? assume the spaceship's diameter is 32m and give answer as the time needed for one revolution. can anybody help me with this question..

2007-09-19 05:55:33 · 1 answers · asked by i-sena 1

2007-09-19 05:34:09 · 8 answers · asked by Anonymous