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When an automobile moves with constant speed down a highway, mostof the power developed by the engine is used to compensate for themechanical energy loss due to frictional forces exerted on the carby the air and the road. If the power developed by the engine is195 hp, estimate the total friction forceacting on the car when it is moving at a speed of 33 m/s. One horsepower equals 746 W.
How many time constants must elapse for an initially uncharged capacitor in an RC series circuit to be charged to 98% ofits equilibrium charge?
the mutual force of gravitational attraction between two masses is 500 newtons.a if the masses are moved 5 times as far
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 7.00 s, Through how many revolutions does the tub turn while it is in motion
What is the buoyant force acting on a cube of copper that measures 4.49 cm on its each side if it is immersed in water. The density of copper is 8933kg/m3
discuss the mechanism of oscillating reactions using the briggs-rauscher or the belousov-zhabotinsky reactions as
question the 1400-turn coil in a dc motor has an area per turn of 2.0 x 10-2 m2. the design for the motor specifies
When a resistor is connected across the terminals of an ac generator (112 V) that has a fixed frequency, there is a current of 0.500 A in the resistor. When an inductor is connected across the terminals of this generator, there is a current of 4...
Water at 22.0 °C is sprayed onto 0.203 kg of molten gold at 1063 °C (its melting point). What is the minimum mass of water that must be used
When a battery is connected to a 100.0-? resistor, the current is 4.00 A. When the same battery is connected to a 400.0-? Find the emf supplied by the battery
A model rocket blasts off and moves upward with an acceleration of 11m/s^2 until it reaches a height of 28m, What is the maximum height attained by the rocket
A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she arrange to stop before reaching the pothole.
The pilot of an aircraft wishes to fly due west in a 47.7 km/h wind blowing toward the south. In what direction should the aircraft head
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