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Two sailboats are approaching a harbor. The velocity of the sloop relative to the schooner is 2.80 m/s in a direction 40.0° east of north. If the sloop has a velocity that is 0.730 m/s due north relative to the harbor, what is the velocity (magnitude and direction) of the schooner relative to the harbor?m/s
A river flows due east at 1.50 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15 m/s due north relative to water.
The antenna on a cordless phone radiates microwaves at a frequencyof 5.0 GHz. What is the maximum length of the antenna if it is not to exceed half of a wavelength
An unstrained horizontal spring has a length of 0.25 m and a spring constant of 180 N/m. Two small charged objects are attached to this spring, one at each end.
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 21.5 m/s, What is the velocity of the end of the train as it leaves
Calculate the energy output when 0.78 kg of water vapor,initially heated to 120°C, condenses to water at 84°C.
A cylinder of mass 250 kg and radius 2.60 m is rotating at 4.00 rad/s on a frictionless surface when two more identical non-rotating cylinders fall on top of the first. What is this final angular velocity
A transformer has 20 turns of wire in its primary coil and 40 turns on its secondary coil. What is the power delivered to this transformer
What must the charge (sign and magnitude) of the particle of mass 1.42 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 650 N/C.
The only two forces acting on a body have magnitudes F1 and F2 and directions that differ by an angle ? (in radians). what is the mass of the body
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. What is the mass of the slower locomotive
In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37000 km/h. What change in the comet's velocity did this collision produce
The elevator is firstly at rest. How far does the elevator move even as accelerating to full speed from rest.
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