Physics - November 2006

For the missile aimed to achieve the maximum range of 8500 km, what is the maximum altitude reached in the trajectory? Answer in units of km.

2006-11-07 14:39:59 · 3 answers · asked by Anonymous

2006-11-07 14:38:06 · 6 answers · asked by symperl 2

An aluminum cube .15m on each side is completely submerged in water. What is the buoyant force on it? how does the answer change if the cube is made of steel? Data: density of aluminum=26.9g/cm^3, density of steel=55.8g/cm^3, and density of water=1.0g/cm^3


Please show the work
thanx for the help

2006-11-07 14:37:00 · 1 answers · asked by lubna h 1

Just because air is not present to be moved, Im not at all convinced that the sound just doesnt exist and its properties could not be measured.

Infact without air to "vibrate" would the properties of sound be effected or just remain in audible to the human ear?

2006-11-07 14:31:05 · 8 answers · asked by Anonymous

2006-11-07 14:10:21 · 4 answers · asked by sarahmuaaz 1

A body is moving on the xy-plane, and is rotating around the z-axis clockwise. What is the direction of the angular velocity? Explain your answer.

2006-11-07 14:02:41 · 4 answers · asked by Anonymous

A bullet is fired horizontally from a pistol, and another is dropped simultaneously from the same height. If air resistance is neglected, which bullet hits the ground first? Please explain for me.

2006-11-07 14:02:14 · 5 answers · asked by Audrey L 2

and say there is a line drawn where the water was before, why afterwards is the water higher? bernoulli's principle??

2006-11-07 13:51:24 · 2 answers · asked by Nick Named 1

If you have five marbles lined up and roll a marble into them - one marble shoots off the end

If you roll two marbles into the the row of 5 then two marbles shoot off the end

Both of these scenarios make perfect sense.... now here's the twist.....

Set up one marble just in front of the 5 - roll two marbles into the single marble so that it strikes the five.....

How many marbles shoot off the end? And why?

2006-11-07 13:50:44 · 3 answers · asked by robertf_9999 1

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a proectile at an enemy ship 610 m on the other side of the peak. If the ship shoots the projectile with an initial velocity of 250 m/s at 75 degress, how close vertically) does the projectile come to the peak?

the ansewr is 210 m, but I don't know how to arrive this answer. So please explain this to me step by step if you can. Thank you.

2006-11-07 13:31:39 · 3 answers · asked by Audrey L 2

I need help with this problem please.. answer + explanation so I can understand it appreciated... Thanks!

A textbook is suspended on a spring scale in an elvator. Of the following, the scale shows the highest reading when the elevator:

a) moves upward with increasing speed
b) moves upward with decreasing speed
c) remains stationary
d) moves downward with increasing speed
e) moves downward at constant speed

Thank you! also...
the same problem above, but separate question with these choices:

a) moves downward with increasing speed
b) moves downward with decreasing speed
c) remains stationary
d) moves upward with increasing speed
e) moves upward at constant speed

2006-11-07 13:15:32 · 5 answers · asked by Jess 1

Assume you can throw a ball 40 m on the earth's surface.

2006-11-07 13:01:26 · 5 answers · asked by Hannah 1

Please help me out here, I'm really confused...all help is appreciated...the more people the more I understand so please help me out...

4. A small box is resting on a larger box sitting on a horizontal surface. When a horizontal force is applied to the larger box, both boxes accelerate together. The small box does not slip on the larger box.
a) Draw a Free body diagram of the small box during its acceleration.
***I'm really confused on what forces are acting on it since it's sitting on top of the larger box and the force is applied to the larger box only...what would the diagram look like?

b) What force causes the small box to accelerate horizontally
c) If the acceleration of the pair of boxes has a magnitude of 2.5 (meters/second)², determine the smallest coefficient of friction between the boxes that will prevent slippage. [final answer was given as 0.26]

5. Draw a Free body diagram for the larger box in question 4 when it's accelerating.

2006-11-07 12:51:25 · 4 answers · asked by Anonymous

2006-11-07 12:45:18 · 28 answers · asked by Goth 1

Bermunda is about as far North as North Carolina, but unlike North Carloina it has subtropical climate year round. Why is this so?

2006-11-07 12:44:17 · 2 answers · asked by Melissa 2

I'm trying to do a problem and problem says asks me what the MINIMUM inital speed necessary to get the rock across the canyon was. It gave us a hint and said that it didn't give us an angle because it implied it in the word: MINIMUM.

What?
Does it mean 0 ?

2006-11-07 12:33:08 · 4 answers · asked by beast 1

Dario, a prep cook at an Italian restaurant, spins a salad spinner 20.0 times in 5.00 seconds and then stops spinning it. The salad spinner rotates 6.00 more times before it comes to rest. Assume that the spinner slows down with constant angular acceleration.

1. What is the angular acceleration of the salad spinner as it slows down?
Express your answer numerically in degrees per second per second.

2006-11-07 12:25:24 · 2 answers · asked by Anonymous

2006-11-07 12:18:41 · 4 answers · asked by Sr.puerco 2

2006-11-07 12:14:20 · 8 answers · asked by ilove_serj 1

marble 1 has an initial velocity of 15.5 m/s and collides elastically with marbles 2 and 3 which are at rest and touching one another. Marble 1 is twice the mass but equal size to the other two marbles. If marble 1 is directed right at the contact point of the other two marbles, find the velocity of (a) marble 2, (b) marble 3 and (c) marble 1.

2006-11-07 12:11:33 · 4 answers · asked by linkinpark_labc 1

Two 2.00 kg masses are connected by a 50.0 cm long rod of negligible mass. This rod can rotate in the vertical plane around a horizontal rotation axis through its middle. Initially assume the rod is balanced and sitting along the horizontal as shown below. Suddenly a 50.0 g spider drops onto one of the masses with a speed of 3.00 m/s. (a) What is the angular speed of the system just after the spider lands? (b) What is the fraction of kinetic energy after the spider lands to just before it lands? (c) Through what angle will the system rotate before coming to rest?

2006-11-07 12:09:43 · 1 answers · asked by linkinpark_labc 1

Someone PLEASE help, I'm not here so people can do my homework but I'm having trouble
A car accelerates southward due to a frictional force between the road and the tires.
a) In what directions the frictional force of the road on the tires? Why does that force exist?
* My answer is that the frictional force is opposite (north) of the tires. I say it exists because when 2 forces are pressed together closely it causes attraction between the two forces.
Am I right?
b) Is the frictional force static or kinetic? Explain your answer.
* I say that it's kinetic friction but I'm not sure why so please help.

7. In the kitchen, frcition sometimes helps and sometimes hinders.
a) Describe at leat two ways in which you can increase friction when you're trying to open a tight lid on a jar.
*** One way I say is pressing/pushing on the lid while opening and I can't think of another way.
b) What materials and methods can be used to decrease friction between food and a cooking surface?

2006-11-07 11:52:24 · 2 answers · asked by A 2

2006-11-07 11:46:42 · 7 answers · asked by kitten83 2

The mass of an object is defined as:
A the amount of matter in an object
B the amount of space an object occupies
C the density of an object
D the surface area of an object



The metric system unit for mass is:
A the meter
B the kilogram
C the pound
D the ounce




Which of the following objects have mass?
A Catalina's guitar amplifier
B Catalina's guitar pick
C The vibrating air around Catalina's amp when she is practicing
D All of the above

2006-11-07 11:37:21 · 5 answers · asked by maconheira 4

i saw it happen

2006-11-07 11:30:15 · 15 answers · asked by sexy back 1 1

2006-11-07 10:58:31 · 7 answers · asked by Anonymous

2006-11-07 10:47:47 · 3 answers · asked by goring 6

Accodring to the Theory of Special Relativity, light, passing by a body, travels in a path that is curved according to the gravity and the electromagnetic field of that body. The force generated by gravity is calculated using mass. Albeit, electromagnetic force would have the greater pull, but it is theorized that gravity has a pull on light. Furthermore, it is theorized that black holes, which generate extreme gravitational pulls, do not allow light to escape.

Photons, upon striking a special metalic surface, transfer their kinetic energy to electrons, which begin to flow. Kinetic energy is calculated with mass and velocity.

Photons are said to have a non-zero energy. According to Einstein, Energy equals the mass of an object multiplied by its velocity squared. If mass is zero, doesn't that also make energy zero?

I don't understand this concept. Can someone please clarify this to me in simple terms. I've read all the websites that talk about the definitions of mass.

2006-11-07 10:40:52 · 8 answers · asked by Rockstar 6

A mass m at the end of a spring vibrates with a frequency of 0.88 Hz. When an additional 680-g mass is added to m, the frequency is 0.60 Hz. What is the value for m, and how do you solve the equation showing work?

2006-11-07 10:40:17 · 3 answers · asked by Pat M 1

A mass attached to the end of a spring is streched a distance X from equilibrium and released. At what distance from equilibrium will it have acceleration equal to half its maximum acceleration? How do you show the work for this equation?

2006-11-07 10:37:53 · 2 answers · asked by Pat M 1