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An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 70.0 km/h is blowing toward the south. If the speed of the plane relative to the air (called the "air speed") is measured by instruments in the plane to be 300 km/h , in which direction should the pilot head? What is the speed of the plane over the ground (called the "ground speed")?
A student is trying to decide what to wear. His bedroom is at 17.0°C. His skin temperature is 36.0°C, Find the net energy loss from his body by radiation in 10.7 min
A bicycle racer is going downhill at 12.2m/s when, to his horror, one of his 2.42kg wheels comes off when he is 75.0m above the foot of the hill. How much total kinetic energy does the wheel have when it reaches the bottom of the hill
The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. What is the resistance of the ion channel
plan a free-body diagram for the charge.
A beaker of mass 1.5kg containing 3.2kg of water rests on a scale. A 3.2kg block of a metallic alloy of density 53400 kg/m is suspended from a spring scale is submerged in water of density 1000 kg/m.
find the initial velocity of the ball. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source.
each day the average family use 100kg of hot water to kill bacteria the water going into the tank at 20degc must be
What is the magnitude of the magnetic field that the spectrometer uses? In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery
The black hole at the center of the Milky way galaxy is estimated to contain about 4 million solar masses. (msun= 2 x 1030 kg), What is the Schwarzchild radius of our galaxy's black hole
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
Illustrate what is the average emf that is induced in this coil if it is in a region where B=2.0 T upward, and the coil's plane is perpendicular to B?
A chamber with a fixed volume of 1.0 m3 contains a monatomic gas at 3.00 102 K. The chamber is heated to a temperature of 5.00 102 K. How many gas molecules are in the chamber
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