Physics - September 2007

After consuming alcohol a person tries to hit baseballs with a bat at a batting cage. Graph the relationship between the # of drinks consumed and the persons reaction time.

2007-09-06 12:55:14 · 1 answers · asked by LovelyLaurra. 4

i'm learning about acceleration due to gravity and velocity

2007-09-06 12:51:53 · 2 answers · asked by Anonymous

2007-09-06 12:47:08 · 1 answers · asked by knine184 1

I want to use 1 meter long piece of string and a stopwatch, how can i determine my average speed of my walk?

2007-09-06 12:30:01 · 1 answers · asked by Anonymous

A solid metal sphere with radius 0.410 m carries a net charge of 0.280 nC.

Find the magnitude of the electric field at a point 0.111 m outside the surface of the sphere.

The internet says my answer is off by an additive constant but I cant figgure out what?

2007-09-06 11:50:17 · 2 answers · asked by frozenlint 2

2007-09-06 11:48:40 · 7 answers · asked by Brett B 1

i need to covert 12 cm cubed to mL but i don't know how to do that?? what can i do??

2007-09-06 11:47:18 · 2 answers · asked by gossip Princess 1

Okay...I'm aware of the theories that say: Space-time is curved onto itself and is finite without boudnary.

But consider this hypothetical situation:


if someone could tear space-time and somehow escape through this ....similar to the Earth analogy ...if Space-time were a sphere then you could just accelerate upwards and escape the topology of the sphere.

If this could happen, what would we observe? Is it just purely a philosophical inquiry ...would there be "nothingness"
would it be timeless ---what would a timeless nothingness entail??? immortality?


???

2007-09-06 11:43:06 · 4 answers · asked by Anonymous

Ignore air resistance and friction.

2007-09-06 11:39:13 · 1 answers · asked by Portgas D 1

I have a science fair coming up soon in which you have to provide a presentation of a topic and a working model. I have deceided to make my project on bernoulli's principle, but I am kind of confused how it works. Also, would a hovercraft using air to push off follow bernoulli's principle? the project is on this website: http://www.all-science-fair-projects.com/science_fair_projects/89/401/932af3e19be52c06d1305dbb7bc3c39b.html

2007-09-06 11:31:05 · 5 answers · asked by JayV 2

with the average acceleration of -2.5m/s2 how long will it take a cyclist t bring a bicycle with an initial speed of 13.1m/s to a complete stop?

2007-09-06 11:20:58 · 2 answers · asked by Ebony S 1

a) 20 miles
b) 40 miles
c) 80 miles
d) 70 miles
e) 10 miles

2007-09-06 11:20:42 · 4 answers · asked by Dr. H(Relax!) 1

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1536m/s in seawater. how deep is the water directly below the vessel if the time delay of the echo to the ocean floor and back is 7s?

2007-09-06 11:17:52 · 4 answers · asked by Ebony S 1

Namely, the downward pull of gravity and the upward support of the floor. Are these forces equal and opposite? Do they form an action-reaction pair? why or why not?

2007-09-06 11:17:49 · 5 answers · asked by kntagler 1

To stop a car, first you require a certain reaction time to begin braking. Then the car slows down at a constant rate. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 75.0 km/h, and 24.4 m when the initial speed is 42.8 km/h. (a) What is your reaction time? s (b) What is the magnitude of the deceleration

How would I figure this out

2007-09-06 10:59:55 · 1 answers · asked by tjmierzwa 2

1) It takes you 9.5 min to walk with an average velocity of 1.2m/s to the north from the bus stop to the museum entrance. What is your displacement?

2.) Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144km on a straight highway?

2007-09-06 10:55:03 · 8 answers · asked by bubblebee 2

Watching piles being driven into the ground is an interesting sight -- the huge machine, the chug and puff and hiss of the engine and then the bang of the hammer. Suppose the hammer and the pile each weigh one ton. Then suppose the hammer drops on the pile from a height of two feet and the impact drives the pile one inch into the earth. What would be the average force of the pile on the ground as it penetrates that one inch?

a) One ton
b) Two tons
c) Twelve tons
d) Thirteen tons
e) Fourteen tons

2007-09-06 10:50:49 · 5 answers · asked by ? 6

A bus traveled in a straight line (east) for 3.2hours, with an average velocity of 88km/h. The bus stopped for 20 minutes, and then went south for 2.8hours at an average velocity of 75km/h.

What is the average velocity for the ENTIRE trip (including the time spent while stopped)?

I wouldn't normally ask but when you have a substitute that knows nothing about what you're learning it's just hard to understand it!!

Thanks in advance....

2007-09-06 10:43:13 · 3 answers · asked by Anonymous

2007-09-06 10:35:16 · 1 answers · asked by Anonymous

Soccer player #1 is 9.3 m from the goal. If she kicks the ball directly into the net, the ball has a displacement labeled A. If, on the other hand, she first kicks it to player #2, who then kicks it into the net, the ball undergoes two successive displacements, Ay and Ax. What are the magnitude and direction of Ax and Ay?
Ax
_____m North--or South--or East-- or West
Ay
_____m North--or South--or East-- or West

2007-09-06 10:22:41 · 1 answers · asked by Marianna E 1

2007-09-06 10:17:04 · 2 answers · asked by Crystal (is in love with him) 1

I mean, could I create it using only electricity, heat, and some kind of brass alloy?

2007-09-06 10:09:10 · 2 answers · asked by Anonymous

2007-09-06 10:09:02 · 4 answers · asked by readingfreak1990 1

A bus traveled in a straight line for 3.2hours, with an average velocity of 88km/h. The bus stopped for 20 minutes, and then went south for 2.8hours at an average velocity of 75km/h. What is the average velocity for the ENTIRE trip (including when they stopped - it'd total 6.333 hours)?

What is the displacement for the ENTIRE trip?

Can someone help me with these 2 questions? I wouldn't normally ask but when you have a substitute that knows nothing about what you're learning it's hard to understand it!!

Thanks in advance....

2007-09-06 10:08:56 · 1 answers · asked by Anonymous

You're traveling in a straight line at an average velocity of 24 m/s. How long will it take you to go 560km?

I have no idea how to do this problem..it's tough to figure this stuff out when you have a sub that knows nothing about what he's teaching!

Work w/ an explanation would be greatly appreciated...thanks in advance.

2007-09-06 10:05:46 · 2 answers · asked by Anonymous

Full Question:

Paper is made from wood pulp. Estimate the number of trees that must be cut down to make one day's run of a big city's daily newspaper. Assume no recycling.

2007-09-06 09:54:04 · 1 answers · asked by Anonymous

A projection is launched from the ground with speed of 20m/s at the angle 53 degrees above the horizontal towards a high vertical wall 26m away. How high in meters above the ground does the projection strike the wall?

Is it 6.7 meters?

2007-09-06 09:36:25 · 3 answers · asked by Kayla G 1

"An object is displaced 25km south-east and then 40km North direction 30 degrees North of East. Find the angle in degrees that the displaced vector makes with east."

Is it 12 degrees?

2007-09-06 09:32:52 · 3 answers · asked by Kayla G 1

The tower has to stand by itself for at least 10 seconds.

2007-09-06 09:31:02 · 9 answers · asked by Anonymous

I know that 2 physical properties are needed for sound: mass and elasticity and I know why masss is need I'm just confused why elasticity is.

2007-09-06 09:28:27 · 2 answers · asked by dancer131 1