Physics

URGENT: Photoelectric effect problem

The work function of a certain metal is 1.85 eV. a. What is the value of the work function in units of Joules? = 2.964 e -19 J b. What is the value of f0, the lowest frequency of light that can re

Neptune has a mass of about 1.02x10^26 kg.

Neptune has a mass of about 1.02x10^26 kg. The length of a day on Neptune is 16.11 hrs. Your task is to put a satellite into a circular orbit around Neptune so that it stays above one spot on the surf

Time for the satellite to circle the Earth once - Orbital dynamics question

If a satellite orbits the Eath with an orbital radius of 7.50x10^6 m determine the a) satellites orbital speed Got this part - 7292.60813 m/s NEED HELP ON THIS PART: b) time for the satellite to ci

What is the distance for the image

An object is located 16.0 cm to the left of a diverging lens having a focal length f = -30.0 cm. Use the correct sign convention for all numerical answers. (a) Where is the image located? (Enter a neg

Where can i find that a tutorial to help me build a rocket for my physics experiment

i want something like a water rocket or anything that isnt too complicated. i dont want a fuel rocket though!-You can find instrutions on how to build a water rocket at the following websites (the las

Physics relativity length contraction question

Hi, I have a physics question that Im doing wrong, but not sure how. It goes... A vechicle travelling at .9c (0.9 times the speed of light) sees a brick wall. If this wall happens to be 80 meters as

Atwhat altitude above Earth’s surface is free fall acceleration equal to three quarters of its value at surfac

The force of gravity is determined by the equation: Fɢ = G • (Me) • (Mo) ⁄ (Re + h)² = (Mo) • g ... where: mass of object = Mo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~… The acceleration due to gravity

Short rutherford model question

One of the reasons that Rutherfords planetary model of the atom has been modified is the observations of the atom do not support the theory pf the electrons orbiting the nucleus in a manner similar to

PLEASE HELP! Modern Physics!

1) A mosquito moving at 7 m/s has a de Broglie wavelength of 9.4 × 10−30 m. What is the mass of this mosquito? Planck’s constant is 6.63 × 10−34 J · s. Answer in units of kg. 2) A photon in a laborat

How do you find average speed

For the Indianapolis 500, the starting order is set by average speed. Cars run four laps, and the four lap average is taken for the starting lineup. Each lap the car takes is averaged in as an average

Static and oscillation problem

i am very stuck on this problem, i am not given much info so i dont know what equations to use A particle undergoes simple harmonic motion with amplitude 29 cm and maximum speed 4.8 m/s how do i fi

Which model shows the location and number of the three major subatomic particles

Im doing my science homework and i couldnt get this one.-You may have worded your question wrongly, as it is not clear. Rutherfords planetary model of the atom tells us that electrons orbit nuclei.Bo

Why a comb drawn through hair attracts a tiny piece of paper

I need to describe in detail why a comb drawn through hair attracts a tiny piece of paper, i also need to use appropriate scientific language, but i dont know what to write... Any help would be appre

Do alligators create Faraday waves

Subsonic mating bellows generate Faraday waves Alligators flirt with physics. When males attract attention by quivering their spiky backs underwater, they create Faraday waves, researchers reported M

How do you rearrange the following physics formula to isolate λ

Sorry, this should normally be easy for me but Im feeling very out of it right now.. Thanks. sinθ= (m+1/2) λ/ w-w*sin(theta)/(m+1/2)=lambda