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There are 8 atoms in a unit cell of Si. Silicon has an atomic weight of 28.09 and a lattice constant equal to 5.43 Amp. Compute the density of silicon.
suppose that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand.
A kid picks up a toy of mass 139g, from the floor. The kid lifts the toy 42.2cm above the floor. How much work does the kid do on the toy
The bellow of a territorial bull hippopotamus has been measured at 110 dB above the threshold of hearing
a 7 kg sample of mercury is completely solidified and liberates 110 kj of energy. what is the original temperature of
The security alarm on a parked car goes off and produces a frequency of 960Hz. The speed of sound is 343m/s. At what speed are you driving
A wire of resistance 9.0 is connected to a battery whose emf script e is 5.0 V and whose internal resistance is 1.0. How much energy appears in the wire as thermal energy in that time
A shopper standing 2.40 m from a convex security mirror sees his image with a magnification of 0.240. What is the focal length of the mirror
a spring has a spring constant of 47.3 nm. a mass of 300 grams is added to the end of the spring and the mass -spring
to study in detail the surface of the moon it is planned to put a geo-synchronous satellite in orbit about the moon.
The pressure in ideal gas is cut in half slowly, while being kept in a container with rigid walls. In the process, 265 kJ of heat left the gas (a) how much work was done during the process. (b) what was the change in internal energy of the gas dur..
1. briefly and clearly explain the concept of inertia held by galilio kepler and descartes. make sure that your
A converging lens has a focal length of 14.0 cm. Locate the images for object distances of (a) 14.0 cm, (b) 4,67 cm, and (c) 28.0 cm, if they exist. For each case, state whether the image is real or virtual, upright or inverted, and find the magnific..
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