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Q. what is the net upward force on an airplane wing of area 20 m^2 if the speed of flow is 320 m/s across the top of wing and 305 m/s across the bottom of the wing?
Q. A 10.00kg box on a smooth, frictionless, horizontal surface experiences a downward force of 30n at an angle of 40 degrees to the horizontal. The box moves 1.50 m to the right. What was the work done by gravity?
A flower pot on a balcony railing falls to the ground 8.63m below. A cat directly beneath the pot sees it begin to fall. How long does cat have to move.
Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient..
An atomic nucleus of mass 288 u moving at 405m/s emits an alpha particle of mass 4.0 u in the direction of its velocity. If the remaining nucleus slows to 360m/s, what velocity does the alpha particle have when it is emitted.
An object with a net charge of 44 µC is placed in a uniform electric ?eld of 554 N/C, directed vertically. The acceleration of gravity is 9.81 m/s^2. What is the mass of this object if it ?oats in this electric ?eld?
A skier moving at 4.50 m/s encounters a long, rough horizontal patch of snow having coefficient of kinetic friction 0.230 with her skis. How far does she travel on this patch before stopping.
Discover the horizontal and vertical displacement
suppose the specific heats of milk and coffe are the same as that of water, and neblect the specific heat of the container.
A 70kg man walks out on a 10kg beam that rests on, but is not attached to, two supports. When beam just starts to tip, what is the force exerted on the beam by the right support.
The diameter of the He atom is approximately 0.10nm. Compute the density of the He atom in (assuming that it is a sphere).
A sphere consists of a solid wooden ball of uniform density 800 and radius 0.20 and is covered with a thin coating of lead foil with area density 20.
At time a grinding wheel has an angular velocity of 21.0. It has a constant angular acceleration of 26.0 until a circuit breaker trips at time = 1.6. From then on, the wheel turns through an angle of 435 as it coasts to a stop at constant angular dec..
A 3.5 k and a 1.5 k resistor are connected in parallel and this combination is connected in series with a 1.8 k resistor. If each resistor is rated at 1/2 W, what is the highest voltage that can be applied across the whole network.
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