Physics - November 2006

they are observed to be separated by 360 million km and to take 5.0 Earth years to orbit about a point midway between them. what is the mass of each?

2006-11-14 16:17:36 · 4 answers · asked by Anonymous

2006-11-14 16:03:26 · 3 answers · asked by lidia s 1

a) it is possible for both of them to be at rest after the collision?
b) it is possible for one of them to be at rest after the collision?

I think no and yes, but i'm not sure.

2006-11-14 15:50:40 · 5 answers · asked by dreamclock 2

The Starship Enterprise (m= 3.9 x 10^9Kg) is traveling at 3 x 10^8 m/s when it slams into earth which has a mass of 6.0 x 10^24 Kg. What is the velocity of Earth if the enterprise sticks to it?

2006-11-14 15:46:11 · 2 answers · asked by josh h 3

if a model of something was made to be full scale 1:1 does it mean that it is the same size as the original

2006-11-14 15:06:27 · 4 answers · asked by Anonymous

If a car weighing 1000 Kg travelling East at 24 m/s collides with a truck weighing 3000 Kg traveling North at 15 m/s, what is the magnitude and direction of the resulting momentum if they're stuck together?

That same car weighing 1000 Kg is traveling such that it strikes the same truck as above at a 60 degree angle, what is the resulting magnitude and direction momentum if they stick together?

2006-11-14 14:49:45 · 2 answers · asked by mike p 2

2006-11-14 14:38:36 · 12 answers · asked by rachelschultzmomma 1

2006-11-14 14:33:31 · 4 answers · asked by Willem V 3

Ok if you are standing next to a railroad track and all the sudden a train whizzes by, will ur body be pulled toward the train, away from the train, go up, or be unaffected? PLEASE HELP ME!!

2006-11-14 14:27:31 · 8 answers · asked by lover. 1

A person lifts a 4.8 kg cement block a vertical distance of 1.4 m and then carries the block horizontally a distance of 7.1 m.

The acceleration of gravity is approximately 9.81 m/s^2
Determine the work done by the person in the proscess. Answer must be in units of joules.

i know how to find the work done by each seperately but when i added the two, the site said my answer was wrong.

can someone explain to me how go about solving this?

2006-11-14 14:22:06 · 2 answers · asked by wish1oh1 1

A baseball (m = 149 g) approaches a bat horizontally at a speed of 43.7 m/s (98 mi/h) and is hit straight back at a speed of 48.3 m/s (108 mi/h). If the ball is in contact with the bat for a time of 1.10 ms, what is the average force exerted on the ball by the bat? Neglect the weight of the ball, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.

I've used (Sum of forces)(time)=(mass x Vf) - (mass x Vo)
doesn't seem to be working, and time is in miliseconds. any help?

2006-11-14 14:11:52 · 1 answers · asked by Any help? 1

2006-11-14 14:01:11 · 1 answers · asked by wmm_stealth 1

How fast would a bullet weighing .005 Kg needs to be traveling to bring a 20,000 Kg tractor trailer moving at 24 m/s to rest? (assume the bullet sticks to the truck) Could this be possible if the maximum speed possible is 3 x 10^8 m/s?

2006-11-14 13:58:10 · 4 answers · asked by mike p 2

2006-11-14 13:55:17 · 7 answers · asked by John B 2

If you have a trailer full of parekeets and they way 10,000 pounds but the trailer only has a capacity for 5,000 pounds, if you keep half of the birds flying would they still weigh 10,000 pounds? So do birds that are flying in a trailer still weigh the trailer down?

2006-11-14 13:52:47 · 3 answers · asked by traxx10 2

2006-11-14 13:51:58 · 8 answers · asked by Pez 1

If a mountain top is closer to the Sun than the desert, when then is the desert hot and a mountain top cold? My guess is friction caused by the rays of the sun. Since there is less air pressure at high altitudes there is less resistance, therefore less friction to heat the surrounding air. Whereas the desert being lower altitudes with higher air pressure, greater resistance, longer distance/travel time, greater friction. Am I even close?

2006-11-14 13:46:23 · 5 answers · asked by Jim C 5

A spherical air bubble originating for a suba diver at a depth of 18.0 m has a diameter of 1.0 cm. what will the bubble's diameter be when it reaches the surface? (assume constant temperature.)

Answer 1.4 cm

2006-11-14 13:45:15 · 2 answers · asked by master 1

2006-11-14 13:40:17 · 5 answers · asked by Anonymous

It is true that you are always exerting a force on the ground, and in turn, it is exerting a force back up to keep you in place. However, you can exert different amounts of force down on the floor, due to variables such as weight, location, etc; does the floor change the force it is exerting back up? It cannot stay the same for everyone, because then the floor would be exerting the same force to a sumo wrestler and a toddler... that would make the toddler fly up, wouldn't it?

2006-11-14 13:39:10 · 5 answers · asked by Zach S 5

The Starship Enterprise (m= 3.9 x 10^9) is traveling at 3 x 10^8 when it slams into earth which has a mass of 6.0 x 10^24. What is the velocity of Earth if the enterprise sticks to it?

2006-11-14 13:31:16 · 3 answers · asked by alp f 1

Which of these quantum numbers is wrong?
I thought i knew this but now im confused.
(2, 0, 0, -1/2)
(1, 1, 0 +1/2)
(2, 1, -1, -1/2)
(4, 3, +2, -1/2)
and why?

2006-11-14 13:17:51 · 1 answers · asked by Anonymous

Before it damages your retina. Don't try this at home.

2006-11-14 13:13:25 · 2 answers · asked by Anonymous

I would appreciate any helpful input on this physics problem. I am really confused on this one. Thanks for any help :)

A 10.0 kg cylinder rollls without slipping on a rough surface. At an instant when its center of gravity has a speed of 8.0 m/s.

a) Determine the translational kinetic energy of its center of gravity.

b) Determine the rotational kinetic energy about its center of gravity.

c) Determine its total kinetic energy

2006-11-14 13:12:05 · 2 answers · asked by Anonymous

2006-11-14 13:10:27 · 2 answers · asked by goring 6

I need to build a catapult or trebuchet for physics and I would like to do so without spending too much money.

2006-11-14 13:10:08 · 5 answers · asked by softballangel612 2

So if that is the case any motional mass that obeys the formula of a wave moving inertialy would then have continual changes of velocity?

2006-11-14 13:06:44 · 1 answers · asked by goring 6

The air exerts a forward force of 10 N on a propeller of a .20kg model airplane. If the plane accelerates forward at 2.0 m/s2, What is the magnitude of the restistive force excerted by the air on the plane?

P.S. Dont get me wrong....I dont want the answer i just need help....Im a Jr. in high school taking College Physics and i miss one class a week so i get behind...please help
*thanks*

2006-11-14 13:02:57 · 1 answers · asked by hottiegirl1216 2

2006-11-14 13:01:29 · 12 answers · asked by BuddySM 1

A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the next slot in the wheel. One such slotted wheel has a radius of 5.0 cm and 500 slots around its edge. Measurements taken when the mirror is L = 500 m from the wheel indicate a speed of light of 3.0 x 10 ^5 km/s.
(A) What is the (constant) angular speed of the wheel?
(B) What is the linear speed of a point on the edge of the wheel?

The answers are:
(A) 3.8 x 10^ 3 rad/s
(B) 1.9 x 10^ 2 m/s


BUT I DON'T KNOW HOW TO GET THESE ANSWERS, AND I REALLY NEED HELP BECAUSE I HAVE A TEST NEXT WEEK. I REALLY WANT TO UNDERSTAND THIS, PLEASE HELP ME!

2006-11-14 12:53:54 · 1 answers · asked by afchica101 1