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Consider the following mass distribution where the x- and y-coordinates are given in meters:5.0 kg at (0.0.0.00) m, 2.5 kg at (0.0,3.8) m, and 4.0 kg at (2.8,0.0) m. Where should a fourth object of 7.8 kg be placed so that the center of gravity of the four-object arrangement will be at (0.0,0.0) m? (x,y)?
An object is acted on by a single nonzero force of magnitude F. Is it possible for the object to have zero angular acceleration? a. Yes or b. No
A car mass 1000 kg moves with a speed of 50 m/s on a circular track of radius 100 m. What is the magnitude of its angular momentum (in kg.meters per second squared) relative to the center of the race track? a. 5.0*10^2 b. 5.0*10^6 c. 2.5 *10^4 d. 2.5*10^6
A person has a far point of 21 cm. This means that the person’s corrective lenses should produce an image 21 cm in front of the eye for an object that is very far away.
A 44.20 cm diameter disk rotates with a constant angular acceleration of 2.84 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at t..
For the system in Section, the eigenvector for the first mode was determined by the Gauss elimination method.
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 3.1 x 105
a 2.0 nc charge is placed on the x-axis at x=-3.0cm another 2.0nc charge is placed on the x-axis at x=3.0cm, What is the potential at the origin
An x-ray beam of a certain wavelength is incident on a crystal, at 31.3° to a certain family of reflecting planes of spacing 41.4 pm. what is the wavelength of the x rays in nanometers
A light bulb is placed 14.2 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, Calculate the focal length of the concave mirror
The star nearest the earth (the sun) radiates the most energy at a wavelength of 470 nm. What is the temperatures of the sun's outer layer, the photosphere
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. How long does the cork remain in the air
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 5.69 10-2 kg/s. What is the speed at which the gasoline moves through the fuel line
A copper cable (p=1.7*10^-8ohms*m) is designed to carry a current of 300A with a power loss of 2W/m. What is the required radius of this cable
A charged particle with a charge-to-mass ratio of |q|/m = 5.7 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.75 T
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