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Light! Physics! Help!

Light from a He-Ne laser of wavelength 994.6 nm is incident on a single slit. What is the minimum width for which no diffraction minima are observed? Answer in units of nm-d * sin 90 = 1 * 994.6 --> d

Index of refraction .....permittivity? permeability? whats the formula

How do you calculate the index of refraction of a media given its properties only? I understand a wave has EM so therefore conductance and susceptibility must play a role?I believe someone told me it

Can you explain quantum mechanics to me

Im a 14 year-old girl, and I recently watched a program called BBC Horizon-What is Reality? and it dealt with quantum mechanics. I understand it to a certain point..but I dont fully understand it. Bec

A vacuum within a vacuum

what if you could create a large vacuum within space, and i know space is a vacuum already, but hypothetically speaking...and you had a hypothetical supper high speed camera that could watch it closed

What are the properties of plasma

Does plasma have a charge?Can it be contained other than by magnetic field?What are theproperties of plasma?-In physics and chemistry, plasma is a state of matter similar to gas in which a certain por

Who (or what), is responsible for the Big Bang

If the Big Bang did happen and God was not responsible for it, but yet was rather a random occurrence, then why hasnt it happened again (or happen all the time)? The fact that a Big Bang has only happ

Energy in the flywheel question

an engine rotating at 2000rpm has a flywheel of 15kg and a radius of gyration of 300mm attached to a smooth out engine cycle. what energy is available from the flywheel at this speed in joules? than

How high above earth’s surface would you have to be before your wt would be 1/2 its current wt

I know that Im supposed to use 1/2mg = GmM (R+h)^2 for the first part, solve for h. whats the difference between m and M in this equation that the teacher gave another student? a different student s

Can you explain quantum mechanics to me

Im a 14 year-old girl, and I recently watched a program called BBC Horizon-What is Reality? and it dealt with quantum mechanics. I understand it to a certain point..but I dont fully understand it. Bec

Physics acceleration questions please help

1.)A car is traveling at a constant speed of 16 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and ha

A particle on a string at radius r=0.22 m is moving in a (horizontal) circle with angular speed, ω=0.55 rad/s.

The string is shortened to 0.15m.Show that the new angular speed is 1.18 rad/s.-L = m . ω . r^2 If angular momentum is conserved then m . ω1 . r1^2=m . ω2 . r2^2 ω2= 0.55 . 0.22^2 / 0.15^2= 1.18 ra

What are the properties of plasma

Does plasma have a charge?Can it be contained other than by magnetic field?What are theproperties of plasma?-In physics and chemistry, plasma is a state of matter similar to gas in which a certain por

Light! Physics! Help!

Light from a He-Ne laser of wavelength 994.6 nm is incident on a single slit. What is the minimum width for which no diffraction minima are observed? Answer in units of nm-d * sin 90 = 1 * 994.6 --> d

A flying man jumps off a cliff with a horizontal velocity of 30ms-1 and vertical upwayrd velocity of 10ms-1 W

A flying man jumps off a cliff with a horizontal velocity of 30ms-1 and vertical upwayrd velocity of 10ms-1 Will he make the jump to the other side if the distance is 55metres? ( the cliff is the sam

More physics acceleration questions please help. (immediate best answer)

1) Two soccer players start from rest, 58 m apart. They run directly toward each other, both players accelerating. The first player has an acceleration whose magnitude is 0.50 m/s2. The second players
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