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A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican's initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s?
Three equal point charges, each with a charge of 1.80?C , are placed at the corners of an equilateral triangle whose sides have a length of 0.550m, What is the potential energy of the system
What must the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 610N/C ? Use 9.81m/s^2 for the magnitude
At T = 0ºC and p = 1000mb, 1g of dry air receives during an isochoric process anamount of heat, what is the amount of heat absorbed
You pull your 55.00 kg friend on a 5.00 kg sled across a patch of snow. You pull using a 48-N force on a rope that makes a 35 degree angle with the horizontal. If the friction force between the sled and the snow is a mere 5-N what is the normal fo..
A mountain climber wears a goose down jacket 2.6cm thick with total surface area 0.95 m2. Determine the rate of heat flow by conduction through the jacket assuming it is dry
A 750 g aluminum pan is removed from the stove and plunged into a sink filled with 10.0 liters of water at 20.0 ° C. What was the original temperature of the pan
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
A wire of diameter 0.850 mm and length 50.0 m has a measured resistance of 2.80 ?. What is the resistivity of the wire
In a certain experiment, the pressure of a gas depends on the volume by P=alphaV^3+betaV^2, What is the work done on the gas
Ships A and B leave port together. For the next two hours, ship A travels at 40.0mph in a direction 20.0 ?west of north while the ship B travels 45.0, What is the speed of ship A as seen by ship B
Calculate the speed of the fetal heart wall at the instant this measurement is made.
A person eats a dessert that contains 230 kcal. The skin temperature of this individual is 36° C and that of her environment is 21° C. The emissivity of her skin is 0.85 and its surface area is 1.3 m2. How much time would it take for her to emit the ..
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