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!
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.3 m when it is uncoiled. The heating element is attached to the normal 120-V wiring and when the wire is glowing red hot it has a temperature of about 439° C and dissipates 2210 W of power. Nichrome has a resistivity of 1.08 10-6 m at 20° C and a temperature coefficient of resistivity of 0.00040° C ?1.
(a) What is the resistance of the heater when it is turned on?
--------?
(b) What current does the wire carry?
--------- A
(c) If the wire has a circular cross section, what is its diameter? Ignore the small changes in the wire's diameter and length due to changes in temperature.
---------- m
(d) When the heater is first turned on, it has not yet heated up, so it is operating at 20° C. What is the current through the wire when it is first turned on?
---------- A
Units of km
An initially stationary 4.1 kg object accelerates horizontally and uniformly to a speed of 12 m/s in 3.3 s. how much work is done on the object by the force accelerating it
A monoenergetic beam of electrons in incident on a single slit of width 1.05 nm. A diffraction pattern is formed on a screen 20 cm from the slit. what is the energy of the incident electrons
An x-ray photon with wavelength 15.0 pm is scattered at 84.0 degrees by an electron, find the resulting kinetic energy of the electron
A light ray is incident upon a plane interface between two materials. The ray makes an incident angle with the normal to the surface of 39 degrees in a material, find thev refracted angle (in degrees) in that material
Starting from rest, a speedboat reaches a speed of 2.30 m/s in 1.2 s. What is the boat's speed after an additional 2.50 s has elapsed, assuming the boat's acceleration remains the same.
An electron is moving at a speed of 1.0 x10^4 m/s in a circular path of radius of 2.1cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. The solenoid has 25 turns per centimeter.
Two charged spheres are 8.45 cm apart. They are moved and the force on each of them is found to have been tripled. How far apart are they now.
the frequency distribution below summarize the home sale prices in a city for a specific month. determine the width of
Write at least one paragraph in which you define diffraction and interference, discuss Huygens' Principle and explain why light passing through a narrow slit
You are examining a flea with a converging lens that has a focal length of 4.40 cm. If the image of the flea is 8.00 times the size of the flea, how far is the flea from the lens
At one instant a bicyclist is 25m due east of a park's flagpole, going due south with a speed of 8 m/s. Then, 11 s later, the cyclist is 65m due north of flagpole, going due east with a speed of 10 m/s.
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