Physics - November 2007

Find the orbital speed of a satellite in a circular orbit 2640 km above the surface of the Earth.
km/s

2007-11-26 07:40:40 · 1 answers · asked by Amber G 2

(a) Find the distance from the center of the Earth at which a 10.0 kg object has a weight of 7.0 N.
m
(b) If the object is released at this location and allowed to fall toward the Earth, what is its initial acceleration?
m/s

2007-11-26 07:40:11 · 1 answers · asked by Amber G 2

sorry for my ignorance lol

im only in second seventh grade (lol)

2007-11-26 06:57:08 · 4 answers · asked by Panama 3

How are electric charges similar to magnetic poles? How are they different?

2007-11-26 06:43:26 · 2 answers · asked by Anonymous

2007-11-26 06:37:34 · 19 answers · asked by STORMY K 3

i'm doin a project on Radioactive pollution. Cherynobyl is an accident.So wanted to know if atom bomb disasters can also be considered for it like nuclear bombs.

2007-11-26 06:17:43 · 6 answers · asked by Golden 2

a=αr ----->this formula relates the linear acceleration and the angular acceleration


Our teacher just gave us this formula and didn't show us how it was derived.

2007-11-26 06:08:38 · 4 answers · asked by Dora the Exploiter 4

A 45.0kg child stands near the edge of a merry-go-round in a local park. If the radius of the merry-go-round is 2.50 meters, and the coefficient of static friction between the child's shoes and the surface is 0.6, find the maximum angular speed of the merry-go-round if the child is not to fall off. (Assume the only centripetal force acting on the child is the friction between his shoes and the surface.

2007-11-26 06:06:31 · 1 answers · asked by Roger 1

A 100 gram meter stick is hung by a string from its center. Masses of 40 grams, 80 grams, and 20 grams are suspended from the stick at the 10 cm, 40 cm, and 70 cm marks respectively. Where should a 50 gram mass be placed to balance the stick?

2007-11-26 06:01:56 · 1 answers · asked by Roger 1

2007-11-26 05:57:19 · 2 answers · asked by Anonymous

2007-11-26 05:54:17 · 3 answers · asked by sgal 1

You have a laser with wavelength (λ) 640 nm. You shine it through a diffraction grating of 400 lines per millimeter. You measure the distance to a screen to be 20.3 cm. You measure the second dot in millimeters from the center dot.
What is the wavelength of the laser light?
_____________________[nanometer].
Use three significant figure or N/A if not enough information is given.


please help and explain thanks!!!!

2007-11-26 05:36:21 · 2 answers · asked by Anonymous

A bycicle with tires 68 cm in diameter travels 8 km. How many revolutions do the wheels make?

2007-11-26 05:14:19 · 1 answers · asked by Rasheena E 1

What's the minimum energy of a proton or neutron (assume mc^2=940MeV) confined to a region of space about the same size as a nucleus (1E-14m)?

2007-11-26 04:09:18 · 2 answers · asked by Nomad 1

2007-11-26 03:54:01 · 7 answers · asked by shadow 1

In the setup sketched, you determine the index of refraction of the prism by measuring the two angles θ1 = 61.5 and θ2 = 32.6. Suppose that your error of measurement of each angle is Δθ = 2 degrees. What is the absolute error of the index of refraction?

2007-11-26 03:45:23 · 3 answers · asked by Anonymous

1- What length (in m) of the horizontal runway does it travel over in 7.62 seconds?
2- How many seconds are required for the airplane to gain 1.00 km of altitude?

2007-11-26 03:35:28 · 4 answers · asked by Princess of Death 1

2007-11-26 03:24:15 · 1 answers · asked by Binson 1

If earth rotates from west to east, is it clockwise or anticlockwise?

When opening a tap is it clockwise or anticlockwise?

2007-11-26 03:19:28 · 4 answers · asked by Nimal T 1

How many seconds will it take the swimmer to get to the end of the pool, 40.2 m away?

2007-11-26 03:13:40 · 1 answers · asked by Princess of Death 1

A) resonance
B) oscillating in a standing wave pattern
C) exhibiting sympathetic vibrations
D) All of the above
E) None of the above

2007-11-26 03:09:26 · 2 answers · asked by Monkjitsu 1

1-What's the airplane's speed relative to the ground?
2-How many degrees west of north is the airplane relative to the ground?

2007-11-26 03:06:52 · 3 answers · asked by Princess of Death 1

I was given the assignment to invent something that hasn't been made before. It can't improve an already made invention, and i have to be able to build a prototype. My invention can't exist in any form. Any ideas?

2007-11-26 03:06:07 · 3 answers · asked by motorradfahren250f 1

the car was travelling 57 km/h(South).What was the change in the car's speed (in km/h)?

2007-11-26 02:53:49 · 2 answers · asked by Princess of Death 1

A carnival clown rides a motorcycle down a ramp and around a vertical loop. IF theloop has a radius of 18m, what is the slowest speed the rider can have at the top of the loop to avoid falling?

2007-11-26 02:52:12 · 3 answers · asked by Anonymous

2007-11-26 02:43:53 · 2 answers · asked by Anonymous

2007-11-26 02:07:52 · 2 answers · asked by Jovan D 1

ummm....ya, ...this is a question for physics, and i really dunno WUT exactly 2 do (I'M CONFUSED!!!)

sooooo.. pleeeaaaseee answer, (and if u could, explain y the answer IS the answer.)

and ummm ... The atomic number of uranium is 92, so that's how many protons it has.

but pleeeeaaaaaasseee ANSWER!

and i'll choose "best answer" for the best answer (the fastest person to answer, but clearly explained.)

THANX!!!!!!

2007-11-26 02:02:09 · 5 answers · asked by DeeDee 3

I was just wondering, if there's more to what I learned about what Newton or Aristotle thought. Were there other scientists who had different ideas?

2007-11-25 23:57:26 · 3 answers · asked by Nimaj Ben 1

2007-11-25 23:54:00 · 8 answers · asked by Anonymous