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Electrons on a radio broadcasting tower are made to oscillate up and down an antenna at 535,000 each second. Show that the wavelength of the radio waves that are produced is 561 m.
a 20 nc point charge is placed on the x axis at x 2.0 m and a -25 nc point charge is placed on the y axis at y - 3.0
On Earth it takes 6 months to measure the parallax of a star. Why? How much longer (in months) would it take to measure a star’s parallax from Mars? What is the parallax of Alpha Centauri (in arcseconds) as seen from Mars?
Silicon at room temperature is doped with impurityconcentrations of Nd = 5 x 10^16cm-3and Na=2 x 10^16cm-3. Determine the conductivity and resistivity of the material
Which kind of research is Professor Carter employing.
A string 2.0 m long has a mass of 2.4 x 10-2 kg. When fixed at both ends, it vibrates with a fundamental frequency 150 Hz. What is the speed of the wave on this wire? What is the frequency of its third harmonic?
9.00 of aluminum at and 19.0 of copper are dropped into 51.0 of ethyl alcohol at. What is the initial temperature of Copper
A certain microwave oven produces microwaves of frequency 2450 MHz by a power of 500 W. How long must it take to heat 556 g of water, initially at room temperature, to the boiling point? Suppose that all the microwave energy is engrossed by the water..
A thin, horizontal rod with length l and mass M pivots about avertical axis at one end. find the magnitudeof the angular acceleration of the rod
A 3600 kg block falls vertically through 5.6 m and then collides with a 640 kg pile, driving it 4.9 cm into bedrock. find the magnitude of the average force on the pile
A short cylindrical block of 6061-T6 aluminum, having an original diameter of 15mm and a length of 81mm, Determine the increase in its diameter
A baseball pitcher throws the ball in a motion where there is rotation of the forearm about the elbow joint as well as other movements. what is the rotational kinetic energy of the forearm
Snowboarder Sherry of mass m is pulled up a slope at constant velocity v by a tow bar. The force of the tow bar is parallel to the slope, which is inclined at (theta) with respect to the horizontal. The coefficient of kinetic friction between the ..
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