Physics - November 2006

It is known that voice of all the human beings is recorded in the space.When necessary , it can be trpped on the earth.If so how the voice of individual is known and trapped on the earth when necessary?

2006-11-20 23:56:33 · 7 answers · asked by global 1

2006-11-20 23:55:28 · 7 answers · asked by cragoogle 1

2006-11-20 23:48:21 · 3 answers · asked by Anonymous

A gardener pushes a 18 kg lawnmower whose handle is tilted up 35° above horizontal. The lawnmower's coefficient of rolling friction is 0.15. How much power does the gardener have to supply to push the lawnmower at a constant speed of 1.4 m/s?

Any thoughts on this one?


Thanks!

2006-11-20 23:25:33 · 6 answers · asked by Anonymous

Unpolarized light:

A)contains electrons that are vibrating in many different planes

B)contains electrons that are vibrating in the same plane

C)cannot be polarized

D)creates glare


Please help me understand what and why the answer is.

2006-11-20 23:19:09 · 5 answers · asked by cult_king_666 1

2006-11-20 22:45:32 · 9 answers · asked by uvraj 1

2006-11-20 22:33:49 · 3 answers · asked by Fugitive Peices 5

Given low ambient noise, what is an average hearing distance? How far away would a person with normal hearing be able to clearly hear and understand a conversation held with normal voices between two people? At what distance would the conversation become hard or impossible to understand/hear?

2006-11-20 20:33:58 · 2 answers · asked by George the Flea 2

2006-11-20 20:25:10 · 2 answers · asked by Anonymous

little bit faster than our feet. I dont get it.

2006-11-20 20:18:14 · 2 answers · asked by sunline 3

A car on a rollercoaster starts at the top of a big hill at rest and rolls without friction. It enters the bottom of the 10 m radius loop with a speed of 20 m/s.

A. What is the force the seat bottom exerts on a 50 kg passenger at the bottom of the loop?


B. What is the force the seat bottom exerts on the passenger at the top of the loop? (Hint: consider conservation of energy)


C. What is the force the seat bottom exerts on the passenger at a point halfway between the top and bottom of the loop?


D. After exiting the loop, the car continues on and passes over the hill of radius R as shown. As the designer, you must calculate the minimum radius of the hill so that the car just maintains contact with the track as it passes over the top.


Thanks in advance everyone!! :D

2006-11-20 19:30:39 · 2 answers · asked by Anonymous

1. Consider two steel rods, A and B. B has three times the area and twice the length of A, so Young's modulus for B will be what factor times Young's modulus for A?

a. 3.0
b. 0.5
c. 1.0


2. An object has weight W on Earth. It is transported to the surface of Planet X which has 4 times the mass and 3 times the radius of Earth. What does the object weigh on Planet X?

a. (2/3) W
b. (9/5) W
c. (4/9) W
d. (1/9) W

Thanks a lot in advance guys!

2006-11-20 19:26:49 · 6 answers · asked by Anonymous

2006-11-20 18:45:22 · 7 answers · asked by damodharan c 1

2006-11-20 18:41:35 · 8 answers · asked by damodharan c 1

2006-11-20 18:36:41 · 6 answers · asked by praveenplp 2

2006-11-20 18:31:36 · 11 answers · asked by Anonymous

1)An object which absorbs most of the light waves which strike it but reflects the blue frequency

A)is opaque and appears blue
B)is transparent and appears blue
C)is opaque and appears yellow
D)none of these

2)An object which absorbsmost of the light waves which strike it but transmits the blue frequency


A)is opaque and appears blue
B)is transparent and appears blue
C)is opaque and appears yellow
D)none of these

Please explain why also.

2006-11-20 18:23:36 · 5 answers · asked by Anonymous

a man of the top of the building 100m height throws a stone vertically upward with an initial velocity 6.0m/s.how long after it is thrown willit take the stone to hit the ground?show ur solution?

2006-11-20 17:57:55 · 2 answers · asked by Anonymous

An expandable cylinder has its top connected to a spring with force constant 2.00 103 N/m. (See Fig. P10.58.) The cylinder is filled with 4.50 L of gas with the spring relaxed at a pressure of 1.00 atm and a temperature of 20.0°C.

Here is the link to the figure:

http://i136.photobucket.com/albums/q200/physics2006/physics2.gif

ANd the questions are:

a) If the lid has a cross-sectional area of 0.0100 m2 and negligible mass, how high will the lid rise when the temperature is raised to T = 260°C?

cm

(b) What is the pressure of the gas at 260°C?

Pa

2006-11-20 17:56:39 · 2 answers · asked by Anonymous

We're doing stuff with the Ideal Gas Law and I've looked throughout our chapter and our notes and haven't found a problem similar to this. There are so many things missing! Argh. Oh and we also have gone over Thermal Expansion equations if that helps any. Here is the question:

A tank having a volume of 0.100 m3 contains helium gas at 120 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.25 atm?

Thanks a bunch!

2006-11-20 16:51:31 · 3 answers · asked by Anonymous

A person standing on the edge of a cliff throws a ball straight up with speed 'u', allowing it to crash on to the rocks below. He later throws a ball with the same speed 'u' straight down. Which ball has the higher speed when it hits the rocks? (Neglect air resistance and assume acceleration due to gravity = -10 metres per second per second)
(Please show how you got the answer!! Best responce gets 10 Points!!)

2006-11-20 16:06:37 · 10 answers · asked by Brody 3

a bout fundemental of semicoductor devices

2006-11-20 16:06:29 · 2 answers · asked by a c 1

2006-11-20 15:54:07 · 3 answers · asked by whoknows 1

force produce on a 4-kg mass

2006-11-20 15:36:32 · 6 answers · asked by Helpmeplease 1

is the velocity of the top surface of a wheel the same as the velocity of the car itself?

2006-11-20 15:24:15 · 8 answers · asked by fre_flyer 2

2006-11-20 15:20:44 · 1 answers · asked by chica1012 2

Can someone explain to me using information about mirrors and reflections why mirrors display words backwards.

2006-11-20 15:15:09 · 3 answers · asked by cult_king_666 1

A 66.0 kg ice skater moving to the right with a velocity of 2.10 m/s throws a 0.19 kg snowball to the right with a velocity of 27.0 m/s relative to the ground.

(a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and the ice.
____m/s to the right

i think i'm supposed to use the conservaton of momentum which is m1v1i + m2v2i = m1v1f + m2v2f but i don't know which one is the v2i or v2f or v1i or v1f.

2006-11-20 15:15:01 · 2 answers · asked by tingerpoo 2

can the EARTH be physically MOVED out of its current orbit to say, one between mars and jupiter, by MANKINDS efforts alone. IF SO, please state the method required.

2006-11-20 15:10:50 · 6 answers · asked by . S 3

How does the force with which you push your friend compare to the force with which your friend pushes you? How do your accelerations compare?

2006-11-20 14:42:22 · 1 answers · asked by Anonymous