Number of results: 151,879
Science ( physics )
A balloon is rising with a velocity of 4.9 m/sec releases an object from height of 96 m. a) How long after its release will the object reach the ground? b) what is the velocity of the object as it hits the ground? The object has in intial vertical velocity, at an initial ...
Tuesday, August 1, 2006 at 5:40am by Margie
1) Why is frequency an element needed in the sound industry? and 2) When there is a sound pressure level of two different sources with different frequencies, why do sound pressure levels have to be determined in each seperate frequency? 1) The sound industry sells equipment ...
Thursday, September 21, 2006 at 12:23am by Kat
what is a cut off frequency and it's application? I need the application explaination more then the definition of cut off frequency!!! Wouldn't it be nice to have a chip that detected blue light, but not red? Could cutoff frequency be used? Of course is could, and is.
Thursday, September 21, 2006 at 9:07pm by Kat
Science-Physics: Space Station
Hello, I am having trouble with this physics problem. Any suggestions with this? Sketch and calculate a spacestation that would meet the requirement of having a 2m tall person experience a 10 % difference in centripetal acceleration between bottom of feet and top of head when ...
Wednesday, October 11, 2006 at 9:21pm by Gerald
Science - Physics
When a projectile is fired horizontally, which of the components of its motion is (A) motion at constatnt speed (B) uniformly accelerated motion (C) If the initial velocity of the projectile is increased, what effect will this have on the time it takes the projectile to fall ...
Wednesday, December 6, 2006 at 7:53pm by Nicole
You watch a distant woman driving nails into her front porch at a regular rate of 1 stroke per second. You hear the sound of the blows exactly synchronized with the blows you see. And then you hear two more blows after you see her stop hammering. How far away is she? It takes ...
Thursday, March 1, 2007 at 5:32pm by Courtney
science ( physics)
hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed the peice of wood to ...
Wednesday, May 30, 2007 at 7:44pm by charlie
a object potential energy is described as 1/2kx^2. what does k and x represent? thanks. This is the PE in a stretched spring. k is the spring constant, x is the distance the spring is stretched (or compressed). Read up on Hookes' law.
Wednesday, June 13, 2007 at 6:22pm by john
A car goes from a dead stop to 25m/s in 5s going east. It keeps going then slows down after it reaches 60m/s. It is being drived on level ground. For the first 5s the magnitude of the velocity vector increases at a constant rate. What is the Instantaneous velocity of the car ...
Wednesday, August 1, 2007 at 3:59pm by ~christina~
Density is the ratio of mass to volume. Mercury has a density of 1.36 x 10^4 kg/m^3. What is the density of mercury in units of g/cm^3?
Wednesday, September 5, 2007 at 10:07am by jen
I will be happy to critique your unit conversion.
Wednesday, September 5, 2007 at 10:07am by bobpursley
can you help me??
Wednesday, September 5, 2007 at 10:07am by stephanie
I'm on a gay test..don't get me wrong physics is hard. Ha. A 10 kg sled is pulled horizontally by a force. If the coefficient of static friction is 0.3 , what force is needed to get the sled moving at a constant velocity?
Friday, October 29, 2010 at 12:40pm by Jacob
Why is time often referred to as a time interval in science? Time is often referred to as a time interval in science because that way its emphasized that time is a furation.
Saturday, November 6, 2010 at 5:47pm by Anonymous
A physics teacher shoots a .30 caliber rifle at a 0.47 kg block of wood. The rifle and wood are mounted on separate carts that sit atop an air track (like a linear air hockey table--ie. frictionless). The 5.7 kg rifle fires a 27 gram bullet at 227 m/s in the positive direction...
Thursday, January 6, 2011 at 12:09am by Joan
science- physics helppppp ! i badly need one T___T
how is physics related to food technology and everything related to foods ?
Tuesday, June 5, 2012 at 7:33am by angelique
Refer to the figure at http://img361.imageshack.us/img361/773/displacementduetorefracra3.gif Use the formula derived at http://www.kwantlen.bc.ca/science/physics/faculty/mcoombes/P1102_Solutions/Refraction/P1102_01_Solutions.htm but use the appropriate values of the incidence ...
Saturday, July 14, 2012 at 5:34pm by drwls
In physics, Numbers that you add or subtract must have the same units. You cannot subtract newtons from kilogram-newtons or kilograms
Thursday, January 24, 2013 at 8:52pm by drwls
Exact solutions for many-body problems are rarely encountered in physics. The following problem deals with a non-trivial motion of four charges. Due to the symmetry of the problem it is possible to determine the trajectories of the charges analytically. Four identical ...
Wednesday, July 10, 2013 at 10:57am by GT
Science, Physics, math, calculus
Pool players often pride themselves on their ability to impart a large speed on a pool ball. In the sport of billiards, event organizers often remove one of the rails on a pool table to allow players to measure the speed of their break shots (the opening shot of a game in ...
Sunday, November 24, 2013 at 11:29pm by James