Physics - October 2006

All eukaryotic cells have membrane covered compartments called {BLANK} that form when part of the cell membrane surrounds an object and pinches off.

2006-10-15 14:27:30 · 1 answers · asked by Bailey 2

An 82 Newton trunk is accelerating along a plank inclined at 26 degrees from the horizontal. The coefficient of kinetic friction of the trunk and plank is .20
What is the value of F sub g
the value of f sub g of x
the value of f sub g of y
the value of the normal force
the value of friction
the value of the net force

What will happen to the acceleration of the trunk if the elevated end of the plank is raised? Why?

What will happen to the motion of the trunk if it reaches a section of the plank where the coefficient of sliding friction makes the frictional force equal to the magnitude of the horizontal component of the weight force?

2006-10-15 14:27:24 · 1 answers · asked by josh h 3

if a curve with a radius of 80m is perfectly banked for a car traveling 70km/h

2006-10-15 14:21:15 · 2 answers · asked by Anonymous

A piece of uncooked spaghetti, held at the ends and bent will break into three pieces instead of two. Why? My household is going insane over this.

2006-10-15 14:20:35 · 2 answers · asked by Anonymous

It's 6 letters.

2006-10-15 14:18:03 · 8 answers · asked by Bailey 2

a company claims that they came up with a battery that has twice the power as any other one on the market. If u put this new battery in ur old flashlight would your flashlight be brighter? And would u expect it to last longer?

2006-10-15 14:08:21 · 8 answers · asked by Greg P 1

In a very cold weather day when temperature is -20C, what is the amount of heat needed to warm to body temperature37C,the .50L of air exchanged w/ each breath?Assume the specific heat of Air=1020j/kg K, 1L of air has a mass of 1.3x 10 raise to neg.3kg. How much heat is loss per hour if the respiration rate is 20 breaths/min?

2006-10-15 14:05:58 · 1 answers · asked by Anonymous

two boxes, connected together one is 65kg the other 35kg, a force pulling on the 35kg box of 250N at 40degrees in a frictionless enviro, what is the acceleration and what is the tension between the 2 boxes

2006-10-15 14:05:31 · 2 answers · asked by Anonymous

A 500 kg cart (including the passenger) coasts down a 37° incline that is 50.0 m long. The cart is stopped by compressing a spring at the end of the incline. The effective coefficient of friction between the cart and the incline is 0.400. While stopping, the magnitude of the acceleration should not exceed 10g. Choose a spring (essentially choose a spring constant) and an appropriate stopping distance so that this condition is satisfied.

2006-10-15 14:02:02 · 2 answers · asked by Anonymous

there is gravititional and centripetal force in atom.....i think it is planet in solar system.is that true?

2006-10-15 13:52:13 · 6 answers · asked by pouli 2

it's 8 letters

2006-10-15 13:44:34 · 3 answers · asked by Bailey 2

(a) what is the bag's velocity?
m/s
(b) how far has the bag fallen?
m
(c) how far below the helicopter is the bag?

2006-10-15 13:38:04 · 3 answers · asked by hi 2

2006-10-15 13:11:47 · 3 answers · asked by hi 2

As a projectile thrown upward moves in its parabolic path, at what point along its path are the velocity and acceleration vectors for the projectile perpendicular to each other?

2006-10-15 13:08:05 · 3 answers · asked by jewlie j 1

a ball thrown horizontally at 25m/s travels a horizontal distance of 50m before hitting the ground.

2006-10-15 12:57:06 · 2 answers · asked by jewlie j 1

its a physics question and I want to know if he is going to hit the barrier and what is the max. speed to no hit the barrier

2006-10-15 12:49:24 · 2 answers · asked by dm 2

what is the tension between the two boxes and what is the acceleration of both boxes? What will be the total forces on all objects?

2006-10-15 12:48:41 · 2 answers · asked by Anonymous

Per Big Bang theory, backround microwave radiation is em radiation which has decreased in frequency rather drastically, from very high (far in excess of x-ray freqs, for example) to very low (i.e. microwave freqs) through an estimated time period of roughly 12-18 billion years (also based on Doppler effect QUITE uniquely and exclusively interpreting or "explaining" observed red-shifts), yet red-shifted light emitted also several billions of years ago from distant galactic starlight "cools" by not even a single wavelength in frequency through all that time, not to mention space? I seriously doubt it, and yet I take my medication and see my therapist regularly, so what gives, Bill Nye, the Science Guy? If experts are trying that hard to avoid plural variables (other than Doppler effect, such as "cooling" or "aging") in a single equation, I certainly don't blame them, but I can't go so far as to excuse them, either, can I?
Indeed, can anyone who sees the emperor's "new clothes"?

2006-10-15 12:22:38 · 10 answers · asked by Anonymous

1. If a velocity that is 1 cm long represents a velocity of 10 km/h, what velocity does a vector 2 cm long drawn to the same scale represent?
2. When a rectangle is constructed in order to add velocities, what represents the resultant of the velocities?
a horizontal side of the rectangle
none of these
a vertical side of the rectangle
the diagonal
3. Calculate the resultant velocity of an airplane that normally flies at 210 km/h if it encounters a 40 km/h tailwind.
Calculate the resultant velocity if it encounters a 40 km/h headwind.
4. Calculate the resultant of the pair of velocities 80 km/h north and 55 km/h south.
Calculate the resultant if both velocities are directed south.
5. What is the maximum possible resultant of two vectors with magnitudes of 4 and 3 units? What is the minimum possible resultant?
maximum magnitude: ?
minimum magnitude: ?

2006-10-15 12:04:25 · 5 answers · asked by vintagex50s 2

2006-10-15 12:00:07 · 11 answers · asked by ▒▒ Da Terra ▒▒ 7

The force that must be exerted to drive a nail into a wall is roughly as shown in the graph of the figure below . The first 1.2 cm are through soft drywall; then the nail enters the solid wooden stud. How much work must be done to hammer the nail a horizontal distance of 5.0 cm into the wall?

2006-10-15 11:58:28 · 2 answers · asked by Anonymous

The very amount of "existence" one has undergone is measured by the time interval. If time were indeed theoretically 'stopped'--such as time travel movies' and science fiction books' plots suggest--would existence be deemed impossible?

2006-10-15 11:48:45 · 8 answers · asked by Mai M 1

if u need money and u know a love spell please get at me no smart butts please i will offer a generous donation a love spell or a return a lover spell

2006-10-15 11:28:48 · 5 answers · asked by Anonymous

2006-10-15 11:20:58 · 9 answers · asked by ? 2

A 680 kg elevator starts from rest. It moves upward for 3.23 s with constant acceleration until it reaches its cruising speed, 1.86 m/s

Help I'm stuck!!!!

2006-10-15 11:20:34 · 2 answers · asked by Anonymous

A cue stick hits a cue ball with an average force of 22 N for a duration of 0.023 s. If the mass of the ball is 0.18 kg, how fast is it moving after being struck?

2006-10-15 11:18:09 · 3 answers · asked by Anonymous

A 75.0 kg stunt man jumps from a balcony and falls 22.5 m before colliding with a pile of mattresses. If the mattresses are compressed 1.00 m before he is brought to rest, what is the average force exerted by the mattresses on the stuntman?

2006-10-15 11:15:23 · 1 answers · asked by rhondasumpter 2

Justin moves a desk 3.2 m across a level floor by pushing on it with a constant horizontal force of 250 N. (It slides for a negligibly small distance before coming to a stop when the force is removed.) Then, changing his mind, he moves it back to its starting point, again by pushing with a constant force of 250 N. (a) What is the change in the desk's gravitational potential energy during the round-trip? (b) How much work has Justin done on the desk? Solve in kJ

2006-10-15 11:14:35 · 2 answers · asked by Anonymous

would you get crushed or just go under the water with minor injuries?

2006-10-15 10:51:58 · 5 answers · asked by Anonymous

Compare it with distance-time graphs or velocity-time graphs.

2006-10-15 10:41:43 · 3 answers · asked by Stephanie 4