Physics Answers

A parallel circuit is set up With three resistors: 5 ohms 10 ohms and 15 ohms. If the power supply to the circuit is 30 V what is the current across each resistor and what is the total current through the circuit?

A proton beam through a region of space where the magnetic field is a uniform value of 5.0 T directed along the positive z-axis. The protons have a velocity of magnitude 4.0 x 10⁵ m/s in the xz plane at an angle of 30° to the positive z-axis. Find the force on the portion

The critical angle for material C is 570. If an incident ray approaches the boundary between material C and the air at 590, the refracted ray will lie along the boundary between the material.

A stone is tossed straight upwards from a height of 2 meters with an initial positive velocity

of 30 m/s. If time it takes to hit the ground is 10 seconds, what is the maximum height it

reaches from the ground?

We want to design an airport runway with the following specifications. The lowest acceleration of a plane should be  

4m/s2

and its take-off speed is 75 m/s. How long would the runway be to allow the planes to accelerate through it?

A model of a helicopter rotor has four blades, each 3.40 m long from the central shaft to the blade tip. The model is rotated in a wind tunnel at 550 rev/min. What is the radial acceleration (in m/s²) of the blade tip?

Two identical light bulb, each with resistance R = 2􀀺 are connected to a source with E = 8

V and negligible internal resistance. Find the current through each bulb. The potential

difference across each bulb and the power delivered to each bulb and to the entire network

if the bulbs are connected parallel

Calculate absolute potential at 25 cm distance from 5 C charge.

Find the velocity aquired by an electron in falling through a potential difference of 2000 volts.

Upon the heating of black body the maximum of its spectrum shiftedfrom 690 nm to 500 nm. By what factor did the radiant emittance increase?