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A brick is thrown upward from the top of a building at an angle of 40° to the horizontal and with an initial speed of 14 m/s. If the brick is in flight for 3.5 s, how tall is the building?
A uniform rod of mass 3.05×10?2kg and length 0.410mrotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. What is the angular speed of the rod after the rings leave it
A radio telescope, whose two antennas are separated by 55 , is designed to get 3.0- radio waves produced by astronomical objects.
A rectangular corral of widths Lx = L and Ly = 2.16L contains seven electrons. What multiple of h2/8mL2 gives the energy of the ground state of this system? Assume that the electrons do not interact with one another, and do not neglect spin.
a person whose near-point distance is 5 cm wears a pair of glasses that are 2.2 cm from her eyes. with the aid of these
Find the change in the force of gravity between two planets when the dinstance between them becomes 10 times smaller.
A certain copper wire has a resistance of 14 ohm. Determine what is the resistance of each piece
Two hockey pucks, A and B, on a frictionless surface are coverd with velcro. Both pucks have a mass of .50kg. puck A is moving south @ a speed of 1.2m/s and B is moving east at a speed of 1.6m/s. the two collide and stick toge
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
A 90.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
a proton with a momentum of 200 GeV/c collides with a proton at rest. Calculate the total energy in the center-of-mass system
A soccer ball is released from rest at the top of a grassy incline. After 6.3 sec, the ball travels 51m. Find what was the soccer ball acceleration
What is the gravitational potential energy of an interstellar cloud, with a density of 1000 H2 molecules/cm3, and radius of 10 pc
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