Physics

Maximum/Minimum Problem

The owners of a small island want to bring in electricity from the mainland. The island is 80m from a straight shoreline at the closest point. The nearest electrical connection is 200m along the shore

De Broglie wavelength of an electron

A photon with wavelength .0268 nm strikes an electron and is scattered at an angle of 30 degrees. What is the de Broglie wavelength of the electron after the collision. I found the scattered waveleng

Need help solving this question with D'Alembert principle!

Hey, this is the first time i have ever done this and i like to know how to solve it. A car with a mass of 1350kg is tested by having it accelerated up a road with a slope of 1 in 5,increasing in spe

What is the entropy of a black hole precisely equal to

Event horizon area divided by the Planck area.

Can you identify 2 factors that affect the amount of induced current

A coiI is set up, with a magnitude of about 100. As I put a magnet in and out of it, a current is supposed to flow through the wire. What affects the amount of the current that now flows?-The factors

What is this device called

I cant remember its name but what i understand the general idea to be is a piece of PVC pipe has man holes drilled in it then a flamable gas (butane ect) is passed through it and lit in fire. Then wav

Please please help with physics!!:)

A peg on a turntable moves with a constant linear speed of 0.42 m/s in a circle of radius 0.25 m. The peg casts a shadow on a wall. Find the following quantities related to the motion of the shadow. (

A baseball outfielder throws a .2 kg baseball at a speed of 50 m/s and initial angle of 30 degrees

what is the kinetic energy of the ball right before it hits the ground? what is the kinetic energy at the highest point? what is the potential energy at the highest point? what is its total time in t

How many kWh of energy does a 550 W toaster use in the morning if it is in operation for a total of 8 min

How many kWh of energy does a 550 W toaster use in the morning if it is in operation for a total of 8 min? At a cost of 12 cents/kWh, how much would this add to your monthly electric energy bill if y

Did Einstein have a comb

And if he did, why did he not use it?-At the time of his most famous work, he looked like this: http://www.thequoteblog.com/wp-content/u… He didnt always look like you imagine - as a young man he wa

How to find time & speed when only gravity (acceleration) and distance is given? Please help!

You drop pencil from your desk, which is 1 meter above the floor. a) How long does it take for the pencil to hit the floor? b) How fast is it going just before it hits the floor?-t = √(2d/g) v = √(2a

Two cannons, one aimed 45° (left) from horizontal, the other aimed 60° (right) from horizontal, are..

simultaneously fired toward each other. a. In order for the two projectiles to collide, at some point in time the y components of position must be the same. Since the cannons were fired simultaneousl

Another DC circuits question

Your toaster oven and coffeemaker each dissi- pate 1200 W of power. You have a 114 V line in your kitchen. For what current must the circuit breaker be rated for you to operate both of these appliance

What is the difference between glass of hot water and a cold water

What is the real difference between the two.And no, I dont mean one is hotter or have higher temperature than the other.-the molecules in the hotter one is moving faster.-If the contents of the two gl

Two successive harmonic frequencies of a guitar string are 360 Hz and 420 Hz. What's the fundamental frequency

Could you please show me how to find it? Thanks in advance!-420 - 360 = 60 Fundamental frequency is 60Hz Every harmonic is a multiple of the fundamental, so if youve got two successive harmonics, t