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Question1
A jet plane w/ a constant speed along a straight line at an angle 30 degrees above horizontal. The plane is 86500 N in weight. Its engines give a 103000 N thrust. Adding to the lift force L (Perpendicular to the wings) and the air resistance R (directed opposite) act on the plane. Find out L and R
Question2
The emf of each flashlight battery is 1.5 volts. Establish the steady-state electric field inside each Nichrome wire. Consider that in the steady state you have to satisfy both the current node rule and energy conservation. These two principles give you two equations for the two unknown fields.
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. find the velocity of the target ball after the collision
If a spaceship orbits an asteroid with a radius of 800m, find the asteroid's moment of inertia in orbit
A block of mass 3.0 kg slides toward the right on a frictionless surface with v0 = 7.5 m/s. What is the position xf where the block stops
A 47.3-cm diameter disk rotates with a constant angular acceleration of 2.70 rad/s2. It starts from rest at t = 0, Find the angular speed of the wheel
A 16.1-m length of hose is wound around a reel, which is initially at rest. The moment of inertia of the reel is 0.42 kg · m2, and its radius is 0.174 m. how long does it take to completely unwind the hose from the reel
A 1.4-m-diameter vat of liquid is 2.2m deep. The pressure at the bottom of the vat is 1.3atm. What is the mass of the liquid in the vat
The spheres are touched together and are then returned to their original separation d. Illustrate what is the force between them.
Three balls with masses of 6 g at (1,9), 1 g at (7,6), and 7 g at (5,1), respectively, are connected by massless rods. What is the acceleration of the center of mass
Two charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm.
A fire truck emitting a siren frequency of 1500 Hz speeds by you at 20.0 m/s (~45 mph). calculate the frequency of the siren as the engine approaches
An electric field of 120000 N/C points due west at a certain spot. What is the magnitude of force that acts on a charge of -7.8C at this spot.
A home receives 1.3kW of electric power from a transformer on a nearby pole. What fraction of the power is lost in this transmission line
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