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A cannon at the top of a 181 m high cliff fires at a pirate ship. The cannonball has an initial velocity of 138 m/s at 30° above horizontal. Ignore air resistance.
(a) How long does it take for the cannonball to land in the water near the pirate ship?
s
(b) How far out from the cannon does the cannonball land?
m
(c) At what angle (positive angle below horizontal) is the cannonball traveling when it hits the water?
°
Two charged Ping-Pong balls separated by the distance of 1.62 m exert an electric force of 0.0234N on each other. What will be the force if the objects are brought closer, to a separation of only 31.4 cm.
A uniform solid flywheel of radius 1.4m and mass 15kg rotates at 2.4 rad/s. What is the magnitude of flywheel's angular momentum in kg.m^2/s.
A compound microscope uses a 73.0mm lens as the objective and a 2.1cm lens as the eyepiece. find the total magnification produced by the microscope
A uniform magnetic field , with magnitude 1.2 mT, is directed vertically upward throughout the volume of a laboratory chamber. What magnetic deflecting force acts on the proton as it enters the chamber
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A car traveling 56.1 km/h is 24.6 m from a barrier when the driver slams on the brakes. The car hits the barrier 1.72 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?
An electric dipole has opposite charges of 6.35*10^-15 C seperated by a distance of 0.29mm, Determine magnitude of the torque exerted on the dipole by the electric field.
A 3.2-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
Over a certain region of space, the electric potential is given by: V = 3x^2 - 2xy + xyz, Find the expressions for the x, y, and z components of the electric field over this region
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, What is the charge on the second sphere
A fighter jet lands on the deck of an aircraft carrier. It touches down with a speed of 70.4 m/s and comes to a complete stop over a distance of 197.4 m, What is the acceleration of the jet
Since you are pulling up a little on the crate, the floor doesn't have to support as much weight. When you are pulling up on the rope as described above, what is the upward force that the floor exerts on the crate.
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