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A roller coaster (425 kilogram) moves from C (5.00 meter above the ground) to D (26.0 meter above the ground). Two non conservative forces are present: friction does -2.00 x 104 Joule of work on the car, and a chain mechanism does +3.00 x 104 Joule of work to help the car up a long climb. Determine the change in the car kinetic energy, ΔKE = KEf - KEi, from C to D? What is the answer in J?
the picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection
a small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a
two blocks of mass m and 4m are joined by a rigid rid of negligible mass. the centers of mass of the blocks are separated by length L. find the center of mass relative to the center of the left block
A spherical water drop 4.2 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 15700 N/C. How many excess electrons does it have
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle's position as a function of time is x(t) = 50.0 cm +(2.00 cm/s)t -(.0625 cm/s^2)t^2 At what time is the turt..
a nearsighted person cannot see objects clearly beyond 25 cm her far point. if she has no astigmatism and contact
The pressure inside a bottle of champagne is 4.5 atm higher thanthe air pressure outside. What is the frictional force on the cork due to the neck of the bottle
Your roommate is working on his bicycle and has the bike upside down. He spins the 66.0cm -diameter wheel, Find the pebbles speed and acceleration
What is the oscillator's total mechanical energy as it passes through a position that is 0.749 of the amplitude away from the equilibrium position
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. What is the moment of inertia of the Earth
Liquid water at 453K and 1002 kPA has an internal energy of 762 kJ/kg and a density of 890 kg/m^3 a) what is the enthalpy (per weight)? b) We change the state to 573K and 1500 kPA. The internal energy is now 2784 kJ/kg and the specific volume 169.7 c..
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