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With the engines off, a spaceship is coasting at a velocity of+220 m/s through outer space. The ship carries rockets thatare mounted in friing tubes, the back ends of which areclosed. It fires a rocket straight ahead at an enemyvessel. The mass of the rocket is 1350 kg, and the mass ofthe spaceship (not including th rocket) is 3.0 x 10^6 kg. Thefiring of the rocket brings the spaceship to a halt. What is the velocity of the rocket?
In the example a sharp metallic tip is held just above a conducting surface with a voltage between the tip and the surface with a current flowing. How would the current vary with the separation between tip and sample (just the functional variation..
In the H atom the radius of orbit B is 16 times greater than the radius of orbit A. What is the total energy of the electron in orbit B
Two identical mandolin strings under 200 N of tension are sounding tones with frequencies of 523 Hz. How many beats per second are heard
In a model AC generator, a 505 turn rectangular coil 7.0 cm by 20 cm rotates at 124 rev/min in a uniform magnetic field of 0.56 T. What is the maximum emf induced in the coil
When a beam of white light is incident (vertically) on a thin oil slick (n = 1.25) floating on water, What is the thickness of the oil slick
It is found experimentally that the electric field in a certainregion of Earth's atmosphere is directed vertically down. At analtitude of 260 m the field hasmagnitude 60.0 N/C. At an altitude of 190 m, the magnitude is 100 N/C.
Seat belts and air bags save lives by reducing the forces exerted on the driver, A 58kg person is in a head-on collision. The car's speed at impact is 13m/s. Estimate the net force on the person if he or she is wearing a seat belt and if the air ..
A 98.0 cm pendulum is released from a small angle. After 124 oscillations the amplitude is one half of its original value. The damping is proportional to the speed of the pendulum bob. Find the value of the damping coefficient, ?, (in Hz).
Only two forces act on an object (mass = 2.70 kg), as in the drawing. (F = 63.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object.
A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
A 5.0 kg mass experiences a force of 40 N when placed a height of 5 km. What is the value of acceleration due to gravity at this point
A planet Z has a hole bored in it at its equator , and a shaft of light from it's star goes straight down that hole to the bottom, what is the circumference and radius of planet Z
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