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If a supersonic jet traveling at Mach 3 atan altitude of 20 000 m is directly overhead at time=0,
a) How long will it be before a ground observerencounters the shock wave?b) Where will the plane be when it is finally heard.
Two disks are mounted on frictionless bearings on the same axle and can b brought together so that they can couple and rotate as one unit. what is the angular speed after coupling
The velocity in a certain flow field is given by the equation V=(3x^2+1)i - 6xyj. Determine the expressions for the two rectangular components of acceleration.
Two blocks are connected by a lightweight, flexible cord that passes over a single frictionless pulley. If m1 >> m2, find the acceleration of each block
Power lines have a limit on the maximum size of the electric field they produce. In most states a maximum of 4 kN/C at about 21 m from the wires is allowed. determine how much charge per unit length is on the wire
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.795 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
A spacecraft is in circular Earth orbit at 6000 altitude. By how much will its altitude decrease if it moves to a new circular orbit where its orbital period is 5% lower
The voltage impressed across a circuit is held constant. If the resistance is halved, what change will occur in the current
As a new electrical technician, you are designing a large solenoid to produce a uniform 0.200 T magnetic field near its center. You have enough wire for 3950 circular turns, and the solenoid must be 1.60 m long and 20.0 cm in diameter. What current w..
A very small charged block with a mass of 2.10 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, What is the sign and magnitude of the charge on the block
In spherical coordinates, the electrical field of a charge distribution is given by E = Be^(-r/Z) r-hat, where the lengthscale Z is a positive number and B is a constant.
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m=0.10g ) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil, What is the maximum oscillation amplitude that won't rupture the disk
A hot-air balloon is ascending at the rate of 11 m/s and is 68 m above the ground as a package is dropped over the side. How long does it take to reach the ground.
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