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The distant moon imaginarius has half the diameter of the earth. The free-fall acceleration on the imaginarius is a= 4 m/s^2. What is the ratio of the average mass density of imaginarius to that of earth, Q= p (imaginarius) / p (earth)?
An object 4.0 cm high is placed 20 cm to the left of aconverging lens with a focal length of + 8.0 cm. Adiverging lens with a focal length of – 12 cm is placed40 cm to the right of the converging lens. Describe the location,nature and size of the i..
Cables that are used to support structures sometimes need to be tested in place to ensure that they are in good shape and at the proper tension. One way to do this is to send waves through them and examine the speed and other properties of the wav..
A .42 kg copper penny drops a distance of 51.3m to the ground. determine the magnitude of the increase in internal energy
A father (m = 65 kg) and son (m = 38 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3.0 m/s after they have separated. How fast would the father be moving.
Two cars emerge side by side from a tunnel. Car C is traveling at a speed of 60 km/h with an acceleration of 40 km/h/min. find who is first to come out of the tunnel first
To prevent damage to floors (and to increase friction), a crutch will often have a rubber tip attached to its end. by what factor does the tip reduce the pressure exerted by the crutch
When a certain paramagnetic material is placed in an external magnetic field of 1.50T , The magnetic permeability of this material is
A ball is thrown horizontally off the top of a building with a height of h=22.5m. What is the horizontal distance the ball travels before it hits the ground
The entrance to a large lecture room consists of two side-by-side doors, one hinged on the left and the other hinged on the right. What is the diffraction angle of the sound under each of the following situations
A lead bullet with a mass of 0.03 kg traveling at 187 m/s strikes an armor plate and comes to a stop. what is the temperature change
two people running a 5000 meter race. cindy is running at 2.8meterssecond. jim starts 3000s late but is running at 4.2
Ball 1, with a mass of 110 and traveling at 14.0 , collides head on with ball 2, which has a mass of 320and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic? What are the final velocities of each ..
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