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The pilot of an airplane traveling 190 wants to drop supplies to flood victims isolated on a patch of land 160 below.The supplies should be dropped how many seconds before the plane is directly overhead? Express your answer using two significant figures.
q1. what mass in grams of steam at 100degc have to be mixed with 277 g of ice at its melting point in a thermally
A female gymnast weighs 620 N. If she is hanging stationary from a high bar, how many forces are acting on her.
The "reaction time" of the average automobile driver is about 0.7s. Compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 12.0
A solid cube of wood of side 2a and mass M is resting on a horizontal surface. The cube is constrained to rotate about an axis AB. A bullet of mass m and speed v is shot at the face opposite ABCD at a height of 4a/3. The bullet becomes embedded in th..
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.6 K. What is the increase in the internal energy of the neon?
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, Find the expressions for the electric field inside the sphere
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
You throw a ball straight up in the air. The instant after leaving your hand, the balls speed is 30 meters per second. Ignoring the effects of air resistance, predict how fast the ball will be traveling 2 seconds later.
Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 44.0mph and half the distance at 65.0. What is her average speed on the return trip
A well-insulated container of negligible heat capacity contains 150g of ice at 0 degrees. If 20g of steam is injected into the container, what is the final equilibrium temperature of the system
A satellite with a mass of 310 kg moves in a circular orbit 3.00 multiply.gif 107 m above the Earth's surface. What is the gravitational force on the satellite
A lens for a 35mm- camera has a focal length given by = 40mm, What is the magnification of the image on the film
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