Physics - April 2007

A diffraction grating with 600 lines/mm produces a third order interference pattern at 60.5 degrees. find the wavelength of the light source.

2007-04-04 03:39:10 · 2 answers · asked by Trevor M 1

Take one glass panel, put some droplets of water on it, and place another glass panel on it. The two panels will stick together and it is almost impossible to pry them apart. What is the scientific explanation for the situation ?

2007-04-04 03:38:51 · 2 answers · asked by Frankenstein 3

Find the power of the corrective lens needed to bring his near point to 25.0cm

2007-04-04 03:36:58 · 2 answers · asked by rkh 1

and the critical angle for light passing from ehtyl alcohol into air

2007-04-04 03:28:07 · 1 answers · asked by rkh 1

2007-04-04 03:17:48 · 4 answers · asked by Anonymous

2007-04-04 03:15:54 · 6 answers · asked by *** n 1

I am having difficulties with this question:

The approximate inside diamete of the aorta is 0.51 cm; that of a capillary is 8 microm. The approximate average blood flow speed is 1.2 m/s in the aorta and 1.2 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system.

2007-04-04 02:28:51 · 2 answers · asked by krstilyzed 1

2007-04-04 02:21:14 · 2 answers · asked by Anonymous

Can you help me understand te concepts of 'Super conductors' and 'Nuclear Fission',...please?

2007-04-04 02:20:47 · 3 answers · asked by Anonymous

Can you try to answer this question using the the word: Peizoekectricity

2007-04-04 02:05:51 · 4 answers · asked by Danny_b 1

Is there any type of lense or glass that completely removes colour? Or could anybody help me with an alternative solution, please?

2007-04-04 01:54:23 · 1 answers · asked by goreyspongemonsters 2

i just want a list of some topics which r related to physics,, in which experiments r possible,, should be a bit challenging,,

its like a research to be done on all by myself,,

any topic in physics,,

thanx,,,

2007-04-04 01:49:30 · 2 answers · asked by gunkedar 2

2007-04-04 01:45:59 · 6 answers · asked by Anonymous

100 J of heat energy are transferred to 20 g of mercury.How much heat is needed to raise the temperature of 20 g of water by the same amount?

2007-04-04 01:15:19 · 3 answers · asked by RhondaJo 2

2007-04-04 01:03:53 · 4 answers · asked by joona k 1

What is propelling it? (No answers referring to tiny fairies please...)

2007-04-03 22:42:31 · 0 answers · asked by sicoll007 4

i'v heared about a exeption for one of termodynamic law : it says that we can get more work with lower energy? it's base was on some new electromagnetik research....any-one knows anything about that?
+sorry for my bad english

2007-04-03 22:28:33 · 6 answers · asked by armin 1

Non mathematical answers only please.

2007-04-03 22:25:13 · 17 answers · asked by Harry Potter 4

2007-04-03 21:52:07 · 14 answers · asked by Ginevra 1

Thermal ammeters are instruments whose operations depend upon the heating effect of current. A moving coil ammeter, a thermal ammeter and a rectifier are connected in series with a resistor across a 230 V sinusoidal AC supply. The Circuit has a resistance of 100 Ω to current in one direction and, due to the rectifier, an infinite resistance to current in reverse direction.



(1) Calculate the readings on the ammeters.?
(2) Calculate the form and peak factors of the current wave.?

any idea on how to solve this or how to draw the circuit ??

2007-04-03 20:02:31 · 1 answers · asked by Prinze , 1

A 0.5-kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.6 N acts on it for a distance of 2 m?
(a) 0.3 J
(b) 0.6 J
(c) 1.2 J
(d) 2.4 J

2007-04-03 18:26:29 · 4 answers · asked by prasiethelord 1

If an 80-kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s,
what average power is generated?
(a) 133 W
(b) 267 W
(c) 1330 W
(d) 2667 W

2007-04-03 18:25:35 · 5 answers · asked by prasiethelord 1

A 19.9 Volt battery pushes a current around a circuit with a resistance of 33.4 Ohms. Find the current in the circuit.

Find the power dissipated in the circuit.

2007-04-03 18:07:58 · 9 answers · asked by triality159 1

An elephant, an ant, and a professor jump from a lecture table. Assuming no frictional losses, which of the following could be said about their motion just before they hit the floor?
(a) They all have the same speed.
(b) They all have the same kinetic energy.
(c) They all started with the same gravitational potential energy.
(d) They will all experience the same force on stopping.

2007-04-03 17:55:47 · 6 answers · asked by Anonymous

. A boxcar traveling at 20 m/s approaches a string of three identical boxcars sitting stationary on the track. The moving boxcar collides and links with the stationary cars, and the four move together along the track. What is the speed of the
four cars immediately after the collision?
(a) 0.15 m/s
(b) 0.20 m/s
(c) 5.0 m/s
(d) 6.7 m/s

2007-04-03 17:36:29 · 2 answers · asked by shearhodes 1

(1 ton = 907 kg)

How do you do such a problem and what is the answer?

2007-04-03 16:57:38 · 9 answers · asked by Anonymous

How is inertia and static friction related?

2007-04-03 16:06:18 · 3 answers · asked by Anonymous

The bullets have to come down somewhere.

Has there ever been reports of someone being killed or injured by a bullet falling from the air due to a gun fired upwards.

2007-04-03 16:06:06 · 9 answers · asked by Nickname 2

Question: A diverging lens has a focal length of -32 cm. An object is placed 19 cm in front of this lens. Calculate (a) the image distance and (b) the magnification. Is the image (c) real or virtual, (d) upright or inverted, and (e) enlarged or reduced in size?

My Approach: for (a) I got di = -11.9 cm, (b) m = 0.63, (c) virtual - di is negative, (d) upright - magnification is positive, (e) reduced - magnification is less than 1.

Tell me if you get the same numbers or different numbers. I would like to know if I am approaching this question without making any errors? Thanks!

2007-04-03 15:32:33 · 1 answers · asked by Jimmy 3

A 20 cm long animal tendon was found to stretch 3.5 mm by a force of 13.9 N. The tendon was approximately round with an average diameter of 7.0 mm. Calculate the elastic modulus of this tendon.

2007-04-03 15:32:23 · 4 answers · asked by Jessie L 2