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The ratio rX/rT of the radius of an unknown nucleus AZX to a tritium nucleus 31T is rX/rT = 1.10. Both nuclei contain the same number of neutrons. Identify the unknown nucleus in the form AZX.
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.49 m. Where should the third charge be located?
Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. What is the wavelength of the these gamma rays
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. What current is needed in the solenoid's wires
A 8.00-kg block of ice, released from rest at the top of a 1.32-m -long frictionless ramp, slides downhill, reaching a speed of 2.76m/s at the bottom. What is the angle between the ramp and the horizontal
Using and Atwood machine with masses m1 and m2, at first with m1 a distance 2h above m2, what is the speed of either mass they pass each other? Make use of energy to solve (hint they cross halfway between the starting positions of the two masses).
A butterfly at eye level is 26 cm in front of a plane mirror. You are behind the butterfly, 48 cm from the mirror. What is the distance between your eye and the image of butterfly in the mirror.
A massless spring with spring constant k is vertically mounted so that the bottom end is firmly attached to the ground, and the top end is free. A ball with mass m falls vertically down on the top end of the spring, becoming attached, so that the ..
You are driving to the grocery store at 20. You are 100 from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 and that your car brakes with constant acceleration. What acceleration would bring you to rest r..
How much greater is an angular momentum of the Earth orbiting about the sun than the moon orbiting about the Earth? (Set up a ratio of angular momenta using data on inside back cover. The period of the moon is about 27.3 days.)
Two forces act on an object. One has a magnitude of152 newtons and points at an angle of68.0° above the +x axis. What are the magnitude and direction of this third force
What is the required average power.
A bird (mass 31 g) is flying at 11.1 m/s when it flies into a glass window and bounces off at a speed of 4.1 m/s. What is the average force on the bird during the collision
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