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A small plane, having a mass of 3000 kg, is flying in air of density 1.0 kg/m^3. Air moves over the top and bottom surfaces of the wings at 160 m/s and 130 m/s, respectively. What is the net minimum wing area needed?
A person drops an object from a bridge spanning a rushing river, falling a distance h before hitting the water. what would be the object's speed at the moment of impact
Two positive point charges, each of which has a charge of 4.3E-9 are located at y=+.10m and y+-.10m, What is the direction of this force
A tennis ball is struck at the base line of the court, 11.5 m from the net. The ball is given an initialvelocity with a horizontal component equal to 27.0 m/s at an initial elevation of 1.21 m.
A metal cube of mass 3kg is immersed halfway in water. if the volume of water displaced is 3L, What is the density of the metal
You charge a piece of aluminum foil (mass = 6.70 g) by touching it to a charged rod. The charged rod gives the aluminum foil a charge of 11 µC. Calculate the value of the electric field from the charged plate
1.01 kg rolling hoop with a radius of 9 cm rolls without slipping. If the angular speed of the hoop is 2.09 rad/s , compute rotational kinetic energy of the rolling hoop in Joules
Two people on ice skates are at rest and stand facing each other. They then push each other away. The mass of the person on the left is 90 kg. Find the ratio of their speeds immediately afterward
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. What is the mass of the aluminum chunk
an npn transistor of a type whose p is specified to range from 60 to 300 is connected in a circuit with emitter
Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges
A football punter accelerates a football from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.26 s). what average force does the punter exert on the ball
A student librarian lifts a 2.2-kg book from the floor to a height of 1.2-m. How much work does he do on the book
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