Physics - September 2007

Mass is a measure of inertia, right? A car traveling at a high speed has a lot of inertia. Does this mean that the faster the car goes, the greater the inertia and the greater the mass?

2007-09-11 12:45:40 · 2 answers · asked by Anonymous

how about microsecond... and nano second...if someone is able to help me in physics please give me your email.
your help is appreciated.

2007-09-11 12:41:40 · 3 answers · asked by shamsan_415 1

Water from a garden hose that is pointed 21° above the horizontal lands directly on a sunbather lying on the ground 4.7 m away in the horizontal direction. If the hose is held 1.4 m above the ground, at what speed does the water leave the nozzle? Please show work.

2007-09-11 11:58:40 · 1 answers · asked by Anonymous

2007-09-11 11:54:08 · 6 answers · asked by kevin l 1

How can you tell the difference between a velocity-time graph, an acceleration-time graph, and a displacement-time graph? And how do you read them?

2007-09-11 11:29:22 · 3 answers · asked by fatiimaq08 3

1. A driver begins to brake when her car is traveling at 14.0 m/s, and the car comes to a stop 3.5 s later. How much further does the car go after she begins to brake, assuming the acceleration is constant?
and
2. A penny dropped from the top of a tower would hit the pavement below in 5.3 s. How tall is the tower?

2007-09-11 11:27:58 · 1 answers · asked by Brian 4

Since a hot-air balloon is filled with heated air, it means that the pressure of the air inside the balloon is lower than the surrounding air. So then why doesn't the atmospheric pressure crush the balloon?

2007-09-11 11:14:17 · 2 answers · asked by DichloroDiphenyl 5

Which would be the positive directions and which would be the negative directions in terms of velocity?

North
East
South
West

2007-09-11 11:05:56 · 2 answers · asked by redalert 2

2007-09-11 10:56:56 · 2 answers · asked by Anonymous

what is ur mass in kilograms?how can i find this?

2007-09-11 10:51:18 · 8 answers · asked by hi ! (: 3

I had this dream last night where I jumped from a high diving board into a pool and I could not rise back up again

In the dream I noticed the pool ventilation was switched off which I thought was the reason in the dream but I know that is not the answer.

I was at the bottom and I had to get over to the steps to drag myself up to the surface

Could this ever happen?

Can it happen at a particular depth or with a certain kind of water?

2007-09-11 10:20:05 · 10 answers · asked by Northern Spriggan 6

How mush distance now remains to the wall?
It says assume the speed of sound is 340 m/s.

2007-09-11 10:17:35 · 1 answers · asked by Alexander 6

An object is released from rest on a planet that has no atmosphere. The object falls freely for 2.77 m in the first second.

What is the magnitude of the acceleration due to gravity on the planet?
Answer in units of m/s/s.

2007-09-11 09:46:42 · 2 answers · asked by josh j 1

A projectile of mass 0.552 kg is shot from a
cannon, at height 7 m,
with an initial velocity vi having a horizontal
component of 5 ms.
The projectile rises to a maximum height of
Y above the end of the cannon's barrel and
strikes the ground a horizontal distance X
past the end of the cannon's barrel.
The acceleration of gravity is 9.8 ms^2 :

Determine the vertical component of the
initial velocity at the end of the cannon's bar-
rel, where the projectile begins its trajectory.
Answer in units of ms.

Determine the maximum height Y the pro-
jectile achieves after leaving the end of the
cannon's barrel. Answer in units of m.

Find the magnitude of the velocity vector
when the projectile hits the ground. Answer
in units of ms.

Find the magnitude of the angle (with repect
to horizontal) the projectile makes when im-
pacting the ground. Answer in units of degree.

Find the range"x" of the projectile. Answer
in units of m.

2007-09-11 09:45:10 · 1 answers · asked by shan h 1

A car traveling with a velocity of 22 m/s is accelerated uniformly at 1.4 m/s/s for 6.4 s.

What is its final velocity?
Answer in units of m/s.

2007-09-11 09:44:49 · 1 answers · asked by josh j 1

everything in the universe apparently falls into one of three categories, a flame isnt a solid because u can pass ur hand through it, it isnt a liquid because it doesnt take the shape of the container u place it in, and it isnt a gas because it doesnt fill the whole area. so what is it??

2007-09-11 09:41:23 · 30 answers · asked by Anonymous

A 0.56 kg rock is projected from the edge of
the top of a building with an initial velocity of
10.2 ms at an angle 44degrees above the horizontal.
Due to gravity, the rock strikes the ground at
a horizontal distance of 17.8 m from the base
of the building.

Assume: The ground is level and that the
side of the building is vertical. The accelera-
tion of gravity is 9.8 ms^2 :
How tall, h, is the building? Answer in
units of m.

2007-09-11 09:37:44 · 2 answers · asked by Jaweida S 1

Hey guys, so for my Newton's Three Laws of Motion project I did pizza dough. So anyways, if the pizza dough hits the counter would that represent Newton's 3rd Law?

2007-09-11 09:34:13 · 2 answers · asked by Angel 1

An artillery shell is fired at an angle of 78.5 degrees
above the horizontal ground with an initial
speed of 1880 m/s.
The acceleration of gravity is 9.8 ms^2 :
Find the total time of fight of the shell,
neglecting air resistance. Answer in units of
min.

2007-09-11 09:24:52 · 2 answers · asked by Jaweida S 1

From my limited mathematical perspective it seems that 'mass' should just be another dimension or variable property associated with wave quanta. You know, a photon has zero mass, an electron has 9.11 × 10-31 kg of mass, a proton 1.6726 × 10−27 kg, etc.

Is there any real expiremental evidence that subatomic particles actually 'occupy' space, i.e. have length, radii, density or any of these other properties we consider of objects 'occupying space' at a macroscopic level.

If the answer is no, is the occupation of space just an illusion used to facilite understanding and interpretation of macroscopic interactions, or do we view the combined wave interactions of subatomic particles into atoms as an impenetrable occupation of space, though the atomic constituents are 'spaceless'?

Philisophically I'm fine in any direction, it's just a question I've never seen explicitly asked and answered anywhere.

2007-09-11 08:07:10 · 3 answers · asked by Robert B 1

If you had one of these http://novalasers.com/ what would you do with it??

2007-09-11 07:58:21 · 1 answers · asked by NOVA l 1

1032 kg/m3: average density.
93.2 mL: volume.

Is it possible to determine mass via these values?

2007-09-11 07:50:33 · 3 answers · asked by sleepthei 3

2007-09-11 07:48:12 · 13 answers · asked by Anonymous

It's simple enough, but I'm having a brain fart. I have the answer, but I need to know how to get there. Thanks.

Question: How long does it take an automobile traveling in the left lane of a highway at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 40.0 km/h when the cars' front bumpers are initially 100 m apart?

Answer: 18.0 s

2007-09-11 07:37:28 · 3 answers · asked by smeiou78 4

Because we're doing it right now. We are traveling through time at a certain speed. What chose the speed were traveling. If we are moving through time at our current speed. We should be able to accelerate, slow down and even stop. Is this just a silly idea?
Maybe time is just perceptive. For instance I'm at work today and time is standing still for me. Yesterday on my day off time was gone in what seemed to be a short string of moments.

2007-09-11 07:27:38 · 10 answers · asked by Anonymous

Would'nt they have come back to us by now. The fact that no one from the future is returning tells me that we are never going to get it.

2007-09-11 07:19:55 · 2 answers · asked by Anonymous

2007-09-11 07:18:35 · 20 answers · asked by vasquez109 2

At a location on earth where g = 32.2 ft/s^2, a bod weighs 161lb. At another location where g = 32.0, the same body will weigh...
161lb
162lb
160lb
163lb
?

2007-09-11 07:17:38 · 2 answers · asked by Anonymous

2007-09-11 07:10:31 · 4 answers · asked by Anonymous

2007-09-11 07:10:10 · 22 answers · asked by Anonymous