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A speedboat can travel with a speed of 55 m/s in still water.
a)If the boat is in a river that has a flow speed of 5 m/s , find the maximum value of the boat's speed relative to an observer on the riverbank.b)Find the minimum value of the boat's speed relative to an observer on the riverbank.c)What is the time difference between a downriver trip (with the current) of 1300 m and an upriver trip (against the current)?
An object with a charge of -4.4?C and a mass of 1.7×10?2kg experiences an upward electric force, If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration
The electric field between the plates of a parallel-plate capacitor is horizontal, uniform and has a magnitude E. What is the mass of the object
the fermi level lies 0.520 ev above the valence band in a sample of silicon at 300k. this should be a p type material.
Wile E. Coyote and the Roadrunner are fictional cartoon characters. The premise of the cartoon is that Wile E. Coyote unsuccessfully tries to catch the very fast and clever Roadrunner. What is the momentum of the second wagon after the collision
Makayla is talking to Mia about the whether we ever landed on the Moon. Mia says," I have a theory about that." Using 3 - 4 complete sentences, what is wrong with Mia's use of the term "theory" in this instance
A baseball is thrown from the roof of 21.1 m-tall building with an initial velocity of magnitude 11.6 m/s and directed at an angle of 53.9 above the horizontal. Use = 9.80 m/s^2. What is the speed of the ball just before it strikes the ground
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. (a) What is the distance to the center of the object? (b) What is the magnitude of the charge?
A force of 15N is applied at an angle of 30 degrees to the horizontal on a 0.750kg block at rest on a frictionless surface. what is the magnitude of the normal force
Scientists want to place a 3600.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.8 times the radius of Mars above the surface of the planet. What is the force of attraction between Mars and the satell..
A small 2.97 g plastic ball is suspended by a 20.2cm long string in a uniform electric field of 1460 N/C. The acceleration due to gravity is 9.8m/s^2 and the Coulomb constant is 8.999*10^9N.m^2/C^2. Is the ball's charge positive or negative?
A flywheel has a constant angular deceleration of -2.36 rad/s2. Find the time required for the flywheel to come to rest
a binary star system consists of two equal mass stars that revolve in circular orbits about there center of mass. the
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