Physics

College physics please help

A source of UV light has a wavelength of 150 nm. How much energy does on of its photons have expressed in (a) joules and (b) electron-volts?-a )E = h . c / λ= 6.63 . 10^–34 . 3 . 10^8 / 150 . 10^–9=1.

Physics question please help!

If the separation between the plates of an isolated charged parallel-plate capacitor is increased slightly, which of the following also increases? a. the capacitance b. the stored electrostatic energy

Estimations in Physics..

I am doing AS level physics and there are a few questions that require us to give an estimate of a certain things....and some of them i coudnt do and need your help with that. 1) estimate of diametre

What is the intensity level of a sound whose intensity is 2.0 x 10^(-6) W/m^2

dB = 10 log{ I/Io} Threshold of hearing:10^-12 W/m² dB = 10 log{2x10^6 / 10^-12} = 10 log{2x10^6} dB = 10 log 2 + 10 log 10^6 = 10*0.3 + 10*6 = 63 dB

Kilocalories physics question

How many joules and kilocalories are generated when the brakes are used to bring a 1300kgcar to rest from a speed of 90km/h ?-calculate the KE of car at 90 km/h = 90 x 1000/3600 = 25 m/s KE = 1/2mV² =

Would Einstein been able to formulate general relativity without metric tensor

Would Einstein been able to solve his general relativity field equations without the earlier mathematical work or Riemanns metric tensor? Or would he have discovered the metric tensor himself, like N

A satellite moves in a circular orbit around Earth at a speed of 4054 m/s.

(a) Determine the satellites altitude above the surface of Earth. _______m (b) Determine the period of the satellites orbit. ______h-a) Ro = G*Me/V² = 24.257E6 m A = Ro - Re = 17.88E6 m b) T = 2π√

Physics for engineers question about electrons

a). What is the force on an alpha particle suspended in a 1000 N/C electric field? Notice that the charge on an alpha particle is +2e and the mass is 4 amu. Hint: e is the positive value of the charge

Two objects attract each other with a gravitational force of magnitude 9.5 x10^-9 N when separated by 19.4 cm

Two objects attract each other with a gravitational force of magnitude 9.5 x 10^-9 N when separated by 19.4 cm. If the total mass of the objects is 5.04 kg, what is the mass of each? heavier mass ___

Can u help me with my homework: physics

how does the angle of refraction compare to the angle of incidence as a light ray passes from one medium into another with a lower index of refraction? what happens as the angle of incidence is increa

Electron passing without deflection through a magnetic field of 0.6. T are balanced by a 4.5 * 10^3 N/C

Electron passing without deflection through a magnetic field of 0.6. T are balanced by a 4.5 * 10^3 N/C electric field. What is the speed of the moving protons?-To pass without deflection..electric fo

Maximum possible efficiency of a coal-burning power plant

A coal-burning power plant produces 3000 MW of thermal energy, which is used to boil water and produce supersaturated steam at 300 degrees Celsius. This high-pressure steam turns a turbine producing 1

I AM HAVING A VERY HARD TIME AND CANT UNDERSTAND ANYTHING ABOUT THIS PHYSICS QUESTION PLEASE HELP!!!!

To solve this problem, use Conservation of momentum, projectile motion, kinematics equations and conservation of energy.initial direction of blue car (S)initial direction of red car (S30E)direction of

If we were to dimatirialize our bodys and convert it to energy, could we move almost as fast as light in space

i dont think we would want to, because as we move, our light energy bodies would redshift, becoming longer in wavelength, ultimately, we would cease to exist ^_^-As a quanta of pure energy, the tenden

An electron moves at a speed of 7.53 m/s as it passes through a 0.60T magnetic field. Find the radius of the

An electron moves at a speed of 7.53 m/s as it passes through a 0.60T magnetic field. Find the radius of the circular path. (me = 9.1 * 10^-31 kg, qe = 1.6 * 10^-19 c)-F=Bqv ( force in magnetic field)