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The angular acceleration of a wheel is α =6t4-4t2 with α in radians/s2 and t in seconds. At time t = 0, the wheel has an angular velocity of +2 rad/s and an angular position of +1 rad.
(a) Write expressions for angular velocity?
(in rad/s)
(b) Write expressions for angular position as functions of time (in s)?
(in rad)
Laser light with a wavelength of 540 nm is directed through one slit or two slits and allowed to fall on a screen 7.70 m beyond. find the distance between their centers
A uniform round tube of diameter 6.32 cm has two piston tops which are balanced at exactly the same height due to a mass m on the left side, what is the pressure at the bottom of the oil filled tube if the height of the pistons is initially 27.9 cm ..
An electron accelerated from rest through a voltage of 370 Volt enters a region of constant magnetic field. determine what is the magnitude of the magnetic field
A 70-kg astronaut is space-walking outside the space capsule and is stationary when the tether line breaks. As a means of returning to the capsule he throws his 2.0-kg space hammer at a speed of 14 m/s away from the capsule.
Suppose that a 1800 kg car passes over a bump in a roadway that follows the arc of a circle of radius 20.8 m, What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 40.0 km/h
A flywheel is initially rotating at 20 rad/s and has a constantangular acceleration. After 9.0 s it has rotated through 450 rad. Its angular acceleration is:
The drill bit of a variable-speed electric drill has a constant angular acceleration of 3.15 rad/s2. The initial angular speed of the bit is 5.95 rad/s. what is the bit's angular speed
The deflection in the moving coil galvanometer is reduced to half when it was shunted with a 40 ohm coil. The resistance of the galvanometer is what
The "wireless" connection used by your laptop computer employs electromagnetic waves with a frequency near 2.4 GHz. What is the approximate size of a dipole antenna for this frequency?
a room measures 1.0 m by 3.8 m by 5.9 m. the heating and air-conditioning ducts to and from the room are circular with
A large air conditioner has a resistance of 6.0 Ohm and an inductive reactance of 16 Ohm. Find the impedance of the air conditioner
1. List real-life communications systems that use the wideband modulations. 2. Explain the reasons in which binary RF digital modulations are more power efficient than M-ary binary digital modulations.
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