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Problem: A Cruise ship has a mass of approximately 10^8 kg and carries 3000 passengers, each whom has an average mass of 70kg. The ship has a velocity of 10 m/s. The passengers decide the ship is moving too slowly and run toward the back with a speed of 2.5 m/s toward the back of the ship. What is the speed when everyone stops at the back? Half the passengers then leap off the back with a speed of 5 m/s. What is the final velocity of the ship?
A uniform electric field with a magnitude of 5550N/C points in the positive x direction. Find the change in electric potential energy when a +16.5-μC charge is moved 5.50cm in the positive x direction
A mass of 6 kg is moving at 31 m/s in the positive x direction. What is the magnitude of the velocity of the masses after the collision in m/s
In the figure the four particles form a square of edge length a = 7.40 cm and have charges q1 = 9.32 nC, q2 = -21.0 nC, q3 = 21.0 nC, and q4 = -9.32 nC. What is the magnitude of the net electric field produced with the particles at the square's cente..
A rocket with mass 1000kg accelerates upwards at a rate of 20m/s2. What is the net force acting on the rocket as it is rising
A rock weighing 7150 N rock with a volumeof 34 L is completely submerged inmercury. The density of mercury is 13.6 kg/L. Determine the buoyant force on the rock
The human body has a surface area of approximately 1.8 m^2, a surface temperature of approximately 30 degrees celsius, how many photons per second does the body emit
A 1.4kg grindstone in the shape of a uniform cylinder of radius 0.2m acquires a rotational rate of 1800 rev/s from rest over a 6.0 s interval at constant angular acceleration
A set of crash tests consists of running a test van moving at a speed of 10.8 m/s (23.76 m/h) into a solid wall. Find the size of the average force which acts on the dummy
A large ant is standing on the middle of a circus tightrope that is stretched with tension Ts. The rope has mass per unit length μ. Wanting to shake the ant off the rope, a tightrope walker moves her foot up and down near the end of the tightrope,..
Two charges, Q1=4.9 nC and Q2=-5.5x10-9 C are situated at the diagonal corners A and C of a rectangle of sides AB=DC=22.6 cm and AD=BC=4.3 cm. What is the magnitude of the electric field at point D?
The coil of a generator has a radius of 0.20 m. When this coil is unwound, the wire from which it is made has a length of 7.50 m. What is the peak emf of this generator
Determine the current in a 14 ohm resistor connected to a battery that has an internal resistance of 0.50 ohm if the voltage across the battery (the terminal voltage) is 18 Volt
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