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A carpenter tosses a shingle horizontally off an 8.8m--high roof at 8.0m/s
a) How long does it take the shingle to reach the ground?
b) How far does it move horizontally?
Why is the human body not an equipotential surface? What is the function of a cell membrane in this respect and what electrical device does it behave like?
a thin glass (n = 1.50) converging lens for which the radii of curvature are R1 = 15.0 cm and R2 = -12.0 cm. Determine the area of the image
Eight books, each 4.9 cm thick with mass 1.2 kg, lie flat on a table. How much work is required to stack them one on top of another.
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on the stone
A wheel accelerates from rest to 12 rad/s at a rate of 78 rad/s^2. Through what angle (in radians) did the wheel turn while accelerating
A motorcyclist is able to ride on the vertical wall of a bowl- shaped track . his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster.
A block of mass of 4kg is dragged 2m along a horizontal surface by a force F=30N acting on a 53 degree to the horizontal. Find change in kinetic energy of the block
A refrigerator does 18 kj of work while moving 115 kg of thermal energy from inside the refrigerator. What is its coefficient of performance
A series RLC circuit consists of a 50ohm resistor, a 3.3 mH inductor, and a 480 nF capacitor. What is the instantaneous current i when e=e_0
A cannonball launched with an initial velocity of 131 m/s at an angle of 40° follows a parabolic path and hits a balloon at the top of its trajectory.
What is magnitude of the gravitational attraction
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