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A battery produces 41.9V when 7.20A is drawn from it and 48.7V when 1.90A is drawn. What is the internal resistance of the battery? What is the emf of the battery?
A cannon fires a cannon ball at 610.37 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
An armadillo and Earth attract each other gravitationally. Which experiences the greater gravitational force, or do they experience the same force magnitude?
The magnitudes of the four displacement vectorsare A=16.0 m,B=11.0 m,C=12.0 m, and D=26.0 m. Determine the magitude and directional angle for the resultant that occurs whenthese vectors are added together.
A ball of mass 0.190 kg has a velocity of 1.47 i m/s; a ball of mass 0.305 kg has a velocity of -0.392 i m/s.They meet in a head-on elastic collision. Find the velocity of their center of mass
The electric potential at a position located a distance of 19.5 mm from a positive point charge of 8.10x10-9C and 10.3 mm from a second point charge is 1.30kV
A baggage handler throws a 20kg suitcase along the floor of an airplane luggage compartment with a speed of 1.2 m/s. What is the suitcase's coefficient of kinetic friction on the floor
A small statue has a height of 3.8 cm and is placed in front of a concave mirror. evaluate the focal length of the mirror
Given a pair of forces, one with magnitude 27.3 N at an angle of 24 degrees clockwise from the +x direction and the other with magnitude 15.7 N exactly in the +x direction: Find the direction of the acceleration
A playground merry-go-round has a radius of 4.40 m and a moment of inertia of 255 kg*m^2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
A system consists of two indistinguishable spin-1 fermions, both confined inside the same box of length L centred on the origin. The particles do not interact with each other.
A long solenoid of length 7.0 x 10^-2 meters and cross-sectional area of 4.0 x 10^-5 meters^2 contains 6200 turns per meter. Find the energy stored in the solenoid after 3 seconds
a uniform 2000 kg beam 10 m long supports a 500 kg weight 3 m for the right support. calculate the forces in each of the vertical support columns
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