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Question: Two point charges are located on the x axis. The First is a charge +Q at x = -a. The second is an unknown charge located at x = +3a. The net electric field these charges produce at the origin has a magnitude of 2kQ/a2. What are the two possible values of the unknown charge?
If you reach a magnitude m=20 at signal to noise of 10 in 5 seconds on a 2-m telescope, how long would it take to reach m=25 at signal to noise of 5 on an 8-m telescope at the same site
Transmission electron microscopes that use high-energy electrons are employed in many areas including the study of biology samples (like a virus) and nanoscience research and development (allow particles and carbon nanotubes, for example).
A photon with wavelength 0.02585 nm strikes a free electron that is initially at rest. find the kinetic energy of the electron after the collision
Determine the magnitude and direction of the force on a horizontal conductor 10cm long and carrying 25 amperes of current from south to north, if places in air in a horizontal magnetic field of flux density .8 w/m2 directed from east to west.
A Beryllium nucleus consists of 4 protons and 5 neutrons. What is the potential energy of the nucleus due to electrical forces
A rope is used to pull a 2.72 kg block at constant speed 6.90 m along a horizontal floor. What are the work done by the ropes force
A rock appears to be 7m below the surface of a lake, whenviewed directly from above. What is the actual depth of the rock
What average force is required to stop an 1100-kg car in 8.0 seconds if the car is traveling at 95 km/h
A bar of gold measures 0.268 m x 0.0204 m x 0.0583 m. How many gallons of water have the same mass as this bar
A 6.00 g bullet, traveling horizontally with a velocity of magnitude 450m/s, is fired into a wooden block with mass of 0.780kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
A horizontal slingshot consists of two light, identical springs (with spring constants of 27.7 N/m) and a light cup that holds a 1.47-kg stone, determine the system's total mechanical energy
Two crates, of mass 77 kg and 108 kg, arein contact and at rest on a horizontal surface (Fig. 4-47). A 729 Nforce is exerted on the 77 kg crate.If the coefficient of kineticfriction is 0.15, calculate the following: the force that eachcrate exerts..
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