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A 4.2kg object,initially at rest,''explodes''into three objects of equal mass.Two of these aredetermined to have velocities of equal magnitudes(5.0m/s)with directions that differ by 90 degree. How much kinetic energy was released in the explosion?
A study shows that mammalian red blood cells (RBCs) carry electric charge resulting from 4.4 million (rabbit cells) to 15 million (human cells) excess electrons spread over their surfaces
A negative charge -0.550 µC exerts an upward 0.700 N force on an unknown charge 0.280 m directly below it. What is the unknown charge (magnitude and sign)? What are the magnitude and direction of the force that the unknown charge exerts on the -0.550..
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.3 kg and contains 15 kg of water. A 1.0 kg piece of the metal initially at a temperature of 170°C is dropped into the water
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.159 N when their center-to-center separation is 43.2 cm. calculate the positive charge in coulombs on the other
A harpsichord string of length 1.32 m and linear mass density 24.0 mg/m vibrates at a (fundamental) frequency of 457 Hz. What is the frequency of the sound wave in air produced by vibration of the string
You want to examine the hairy details of your favorite pet caterpillar, using a lens of focal length 8.9 cm that you just happen to have around. what angular magnification do you achieve
The radius of the GM tube's window is 3.5 cm. The source is 3 cm from the GM tube. Compare the surface area of a sphere 3 cm from the source to the area of the GM tube's window.
An inductor has a 54.0-? reactance when connected to a 60.0-Hz source. What is the maximum current in the inductor
a 1.0m length of straight wire carries a current of 21 a in a uniform magnetic field of 60 mt whose direction is at an
The ends of a 20cm long, 2.0cm diameter are maintained at 0°C and 100°C, What material is the rod made of
A lighthouse sweeps its beam of light around in a circle once every 6.0 s. To an observer in a spaceship moving away from Earth, What is the speed of the spaceship relative to Earth
A 0.565-kg ball has an elastic, head-on collision with a second ball that is initially at rest. What is the mass of the second ball
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