Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Problem 25.72
A light-emitting diode (LED) connected to a 3.0 V power supply emits 440 nm blue light. The current in the LED is 21 mA , and the LED is 71 % efficient at converting electric power input into light power output.
Part A
How many photons per second does the LED emit?
Block A with mass 3.72 kg travels with speed vi=3.74 m/s on a smooth horizontal surface and collides with a stationary block B whose mass is 2.29 kg. How much kinetic energy was lost in the collision
a 0.25 kg ball moving north at 7.7 m s strikes a wall obliquely and rebounds heading east with the same speed of 7.7 m
question you cause a particle to move from point a where the electric potential is 17.7 v to point b where the electric
A uniformly charged ring of radius 10.2 cm has a charge of 87.5 µC. Find the electric field on the axis of the ring at x = 3.0 cm
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. A trainee riding in the chamber of a centrifuge rotating with a constant angular speed of 2.6 rad/s..
question apparent weight a 550-n physics student stands on a bathroom scale in an 850-kg including the student elevator
An electric device, which heats water by immersing a resistance wire in the water, What is the resistance of the heater wire
A small body of mass m can move on an inclined plane which forms an angle α = 10 degrees with the horizontal. The dynamic friction coefficient among the body and the surface of the inclined plane is μk = 0.2. The body is attached to a motor with a ma..
A 15-cm-diameter cylinder of heliumgas is 20 cm long and at 20°C. Thepressure gauge reads 120 psi. What is the mass of the helium
The vibrational energy levels of an HBr molecule are EK = C (K + ½), where C = 5 · 10–20 Joules and K = 0, 1, 2,… Each level is singly degenerate: gK = 1. Consider four HBr molecules trapped in a solid matrix such that they are able to undergo vib..
A 1.2 kg block is held at rest against a spring with a forceconstant k=730 N/m. Intially the spring is compressed a distanced. When the block is released, it slides across a surfacethat is frictionless except for a rough patch of width 5.0 cm that..
An object of mass m moves in a circle of radius R under the influence of a force of magnitude F.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd