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A wind is blowing with velocity v2 = 10 m/s over your house. Inside the house the air is still, v1 = 0.a) As a result of the wind, is the pressure above the roof larger or smaller than inside the house?b) If the roof has an area of 100 m2, what is the net force (magnitude and direction) on the roof?
In a head-on collision, the car stops in 0.23 {rm s} from a speed of 17 {rm m}/{rm s}. The driver has a mass of 77 {rm kg}, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fract..
Consider two displacements, one of magnitude 2.9 m and another of magnitude 4.4 m. What angle between the directions of this two displacements
Two bumper cars are driving directly toward one another. The first car, mass m1 = 150 kg, What is the total momentum of the system
A tetherball leans against the smooth, frictionless post to which it is attached, What is the force the pole exerts on the ball
A heat engine runs in the cycle A to B to C and back to A. The pressure at C is 200 kPa. The volume at C is 20 liters.
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. Determine the average velocity of the fish for the entire process of jumping and swimming underwater
Power windmills turn in response to the force of high-speed drag. For a sphere moving through a fluid, the resistive force, FR is pro- portional to r2v2, where r is the radius of the sphere and v is the fluid speed.
What is the height of the power line and the initial speed of the ball?
Give a definition of "laissez faire" economics. (An economic doctrine that opposes government regulation of or interference in commerce.) Explain why do you think this was the dominant political and legal view in the 1800s and early 1900s?
Specific volume [ft^3/lbm] at the final state of tank
A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, What muzzle velocity should the soldier report to his sergeant
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both cases
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