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The Earth's interior currently holds approximately 1017 kg of Uranium-238, which has a half-life of 4.5 billion years. How much was present when the Earth first formed? If the Sun expands and consumes the Earth 9 billion years from now, how much U-238 will be left just before we are engulfed?
A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. What is the pressure on the bottom when water is added to fill the pipe to its top
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1050 A, What is the power loss due to resistance in the line
The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. Determine the skier launch speed
A source delivers an AC voltage of the form ?v = 92.2 sin (60?t), Find the rms voltage of the source
A locomotive slows from a speed of 26 m/s to 0 in 18.0 second. Find what distance is traveled by the locomotive
The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find out the maximum speed the stone can attain without breaking the string.
The only two forces acting on a body have magnitudes F1 and F2 and directions that differ by an angle ?. what is the mass of the body
Consider a proton and an electron separated by a distance of 3 nm. Find the magnitude of the gravitational force between them
A model rocket rises with constant acceleration to the height of 3.7, at which point its speed is 25. what was the magnitude of the rocket's acceleration.
A 0.43 kg soccerball is kicked with a velocity of 25 m/s at an angle of 37 degrees above the horizontal. What is the kinetic energy at the peak of its trajectory
a 3-kg object moving to the right on a frictionless horizontal surface with a speed of 2 ms collides head-on and sticks
A machine componant is subjected to the forces and couples shown. The componant is to be held in place by a single rivet that can resist a force but not a couple. determiune the location of the rivet hole
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