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A meteorologist in a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.24 ms elapses between the sending and the return of a radar pulse. How far away is the cloud?
A tow truck pulls a car 5.2 km along a horizontal roadway using a cable having a tension of 790.
At a certain point in a horizontal pipeline, the water's speed is 4.00{\rm m/s}, Find the gauge pressure at a second point in the line
During a thunderstorm, winds with a speed of 49.4 m/s blow across a flat roof with an area of 751 m2
a 4kg disk travelling at 4 m/s strikes a 2 kg stick of length 4m that is lying flat on frictionless ice. What is the translational speed of the disk
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.37?
what is the acceleration of the wallet. If the contact between ball and ground lasted 1.6ms, what average force was exerted on ball.
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
If a parallel mirror He-Ne laser had a homogeneous line shape with v=1.5GHz, and small signal peak coefficient of .001/cm length=100cm and reflectance's 100 percent and 97 percent, how many longitudinal modes would initially contribute to the laser o..
Two carts are involved in an elastic collision. The dynamics cart A with mass 0.550 kg hits the collision cart B with mass 0.550 kg (initially at rest). What is the final kinetic energy of the system
A constant horizontal force Fa pushes a 1.50kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. gives package's x and y velocity components versus time t.
The racer decides to race against a stock car. Both start from rest. The stock car leaves 1.0 sec before the race car. Find the velocities of both cars at the instant they are side by side
External work equal to 4x10-7 J is needed to move a -5 nC charge at constant speed to a point at which the potential is - 20 V. What is the potential at the initial point
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