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An internal explosion breaks an object, initially at rest, into two pieces. One piece (m1) is 2 times more massive than the other (m2). If 7500 Joule were released by the explosion, find how much kinetic energy did each piece get?
A military helicopter on a training mission is flying horizontallyat a speed of 60.0 {\rm m/s} and accidentallydrops a bomb (fortunately not armed) at an elevation of300 {\rm m}. You can ignore air resistance.
This is the question: An atomic nucleus at rest decaysradioactively into an alpha particle and a smaller nucleus. What will be the speed of this recoiling nucleus
Three resistors having resistances of R1 = 1.53?, R2 = 2.37?, and R3 = 4.73?respectively, are connected in parallel to a 28.3 V battery that has negligible internal resistance. Find the equivalent resistance of the combination
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. What is her average speed for the round trip
The ratio of the mass of the earth to the mass of the moon is 82.6. Suppose that the radius of the earth is about 6494.0 km and that the distance among the center of the earth and the moon is 387319.0 km. Determine the distance of the center of mass..
The index of refraction for a certain kind of glass is 1.645 for violet light and 1.615 for red light. A ray of violet light and a ray of red light are both incident on this glass from air and both have the same refraction angle of 31.12o. What is th..
In a laboratory, a wavelength of a particular hydrogen emission line (Balmer beta line) is observed as 486.1 nm. what is the stars radial velocity
Two boxes of mass 4.70 and 2.70 kg are in contact and are accelerated across a horizontal surface by an force of 28.24 N applied parallel to the surface and pushing on the lighter box. Find the acceleration of the two boxes
What is least amount of work required by an external force
A 3.0-g bullet traveling at 350 m/s hits a tree and slows down uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What was the force exerted on the bullet in bringing it to rest
a gymnast with mass m1 46 kg is on a balance beam that sits on but is not attached to two supports. the beam has a mass
q1. a 100 kg truck moving at 10 ms runs into a concrete wall. it takes 1.0 sec for the truck to completely stop. what
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