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A transformer has 280 turns in the primary and 110 turns in the secondary. What kind of transformer is this and by what factor does it change the voltage. Please show all work.
As part of a safety investigation, two 1900 cars traveling at 23 are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.5 to stop, and (b) car that hits a concrete barrier and ta..
In a mass spectrometer, a singly, negative charged ion having a particular velocity selected by using a magnetic field of .10 T perpendicular to an electric field of 1000 V/m. What is the mass of the ion
A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves.
A camera has a lens with a focal length of 25.6 cm. how far from the film should the lens be placed
A spring of spring constant 11,000N/M is compressed by a block of mass 3kg is released from rest at the top of the incline plane. how far has the block moved down the incline
A woman can read the large print in a newspaper only when it is at a distance of 65 cm or more from her eyes. What should be the refractive power (in diopters) of her glasses
At a rock concert, the sound intensity 1.0 m in front of the bank of loudspeakers is 0.10 W/m^2. How much energy is transferred to each eardrum in one second
If it takes 3.60 x10-13 s for a nitrogen molecule to hit the wall and rebound with the same speed but moving in an opposite direction (assumed to be the negative direction), what is the average acceleration of the molecule for the period of this t..
A uniform plank of length 5.8 m and weight 217N rests horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can a person who weighs 460 N walk on the overhanging part of the plank before it just beg..
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.
The three displacement vectors in the drawing have magnitudes of A = 5.47 m, B = 5.43 m, and C = 3.91 m. Find the resultant ((a) magnitude and (b) directional angle) of the three vectors by means of the component method. Express the directional an..
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
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