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A 23kg child eats a candy bar containing 230 kcal of chemical energy. If the conversion to mechanical energy was 100% efficient (and it isn't), how high a hill (in meters) can the child climb before needing another snack?
when two lenses are used in combination the first one forms an image that then serves as the object for the second
question1a small asteroid of mass 2.6e9 kg is revealed travelling at a speed of 18kms on a direct heading for starbase
A deuteron (a neutron and a proton) has a mass of 3.34 x 1027 kg and a charge of +e. Find the time required for it to make one half of a revolution
Two pendula of equal length b and equal masses m connected by a spring of force constant k. Write the Lagrangian for the system, and use it to derive the equations of motion of the system
A hollow metal sphere has a potential of +360 V with respect toground (defined to be at V = 0) and has a charge of 5.9 x10-9 C. Find the electric potential at the center of the sphere.
A rotating cylinder about 12.00 km in length and 8.00 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the same acceleration because of gravity on Earth.
Suppose a duck lives in a universe in which h = 2? J · s. The duck has a mass of 2.55 kg and is initially known to be within a pond 1.65 m wide. determine the uncertainty in the duck's position after this time interval
A monochromatic light source used in a diffraction experiment has a wavelength of 4.60 X 10^-7 m. What is the energy of a photon of this light
A 9800 kg boxcar traveling at 19 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s
Write a report on the operations and symmetries
a charge q1 3.00 nc is placed at the origin of an xy-coordinate system and a charge q2 -1.00 nc is placed on the
A rifle with a barrel length of 57cm fires a 12g bullet with a horizontal speed of 450m/s, What resistive force (assumed to be constant) does the wood exert on the bullet
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