Physics

What are the mechanisms required for time travel

Ive just made a lot of things, id like to do again differently. Even thought it is impossible, I have all the time in the word and would like to pursue a quest for time travel. So just to get some ext

Please help with physics. 10 points best answer.

The wheels on a bicycle are 11.9 cm in diameter. The bicycle starts from rest and attains a velocity of 32 km/hr in 6.8 seconds. How many revolutions did the back wheel make during the 6.8 seconds?-As

What is the heaviest material I can get

Basically, Im making a trebuchet for school and need the most weight I can for the counterweight. I have about 11 cubic inches to put the weight in. I have a little lead. What other things can I put i

If you are in a car, traveling at the speed of light, what happens when you turn the headlights on

The problem is that you cantreach the speed of light! you just can reach 99,9%.. and if you are in the car traveling with that speed you wont see anything!! but what will happens is that the light wil

Commercial trucks cause about 18,000 lane-change and merging accidents per year in the U.S....

. To prevent many of them, a warning system covering blind spots is being developed. The system uses electromagnetic waves of frequency 2.4×1010 Hz. What is the wavelength of these waves? Help pleeea

Help with Projectile Motion

3. A movie stunt man is to run across a rooftop and then horizontally off it, to land on the roof of the next building. The second buildings roof is 4.8 m below and 6.2 m distant from the edge of the

Force and motion question

A 3 kg block is at rest on a horizontal floor. if you push horizontally on the 3.0 kg block with a force of 12.0 N,it just starts to move. (a) What is the coefficient of static friction? (B)A 7.0 kg

Physics help? (heat capacity and calorimeter questions)

Here are the two questions (this was actually from a test, and my teacher marked them wrong but i thought i got them right.) 1. 950 g of a liquid requires 3800 J of energy to raise the temperature by

What is the afe maximum current for a household circuit

I am just confused i dont how to find it, i need it for physics im in Australia by the way.-If you are in Australia the rules are 15 amp maximum for a normal circuit (total loading all points = 3600 W

Can light be used to find an object with 4 spatial dimensions in our universe

Yes,we could observe its shadow and if it moved and rotated in all 4 axises, deduce its shape. I recommend one of these, your local library should have a copy: http://www.amazon.com/s/ref=nb_sb_ss_i

Is this a decent summary of the photoelectric effect

• Electromagnetic waves are comprised of photons (particles representing a quantum of electromagnetic radiation). • When EMR hits a metal, there is a one-to-one interaction between the photons and th

θ = tan^-1 (μs) ;μs= coefficient of static friction.

A box sits on a horizontal wooden ramp. The coefficient ofstatic friction between the box and the ramp is 0.30. You grab oneend of the ramp and lift it up, keeping the other end of the rampon the grou

Help with friction and acceleration

Two lovers are parked 20.0 m from the edge of a cliff in a car whose mass, including that of the occupants is 1000 kg. A jealous suitor ties a rope to the cars bumper and a 200 kg rock to the other en

May somone please provide an equation for amplitude, harmonic relation

Can anybody give me an equation for the graph at the bottom of this site it is the relationship between the amplitude of a wave on a string (Guitar) and the harmonic number of the frequency from the

Can somone please identify the veriables in this equation

A=at^2/4(pi)^2 It is the relation between the harmonic frequency number and the amplitude of the wave.-Hey That One Interrcial Kid.It spells Jesus Christ , with a capital C... If you tell others to s