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When a battery is connected to a 100-? resistor, the current is 4.00 A. When the same battery is connected to a 442-? resistor, the current is 1.08 A. Find the emf supplied by the battery and the internal resistance of the battery. (When entering units, use ohm for ?.)
Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. what is the mass of each block
A ball moving at 5ms collides head on elastically with a ball at rest. what are the velocities of the two balls after the collision
Calculate the rotational inertia of a meter stick, with mass 0.576 kg, about an axis perpendicular to the stick and located at the 29.9 cm mark
Assume the mass density of Earth from the center to r= R_cm (radius of the core mantle boundary) is d_cm and from R_cm until the surface r=R_e the density is d_e. Using these densities, determine the gravitational potential energy of the Earth
The moon in its orbital about the earth has a centripetal acceleration about 1/4200 of that an object dropped on Earth's surface. If the moon were twice as far away what would its centripetal acceleration be?
You have a compound microscope with a barrel of length 163 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
A nuclear power plant has an electrical power output of 1700 MW and operates with an efficiency of 34%. what is the rise in temperature of the flowing water
A 1.50 ? 103-kg car starts from rest and accelerates uniformly to 16.5 m/s in 12.4 s. Find the average power developed by the engine
Determine the maximum and minimum of the absolute value of the magnetic flux through a large triangular wire loop that has three equal sides of 1.85 m
A circular surface with a radius of 0.062 m is exposed to a uniform external electric field of magnitude 1.55 104 N/C, What is the angle between the direction of the electric field and the normal to the surface
A 0.13 kg baseball is hit by a .95 kg bat. The contact point on the bat is moving at 40 m/s just prior to ballbat contact, How fast is the ball moving just after impact
An object is 15 cm in front of a diverging lens that has a focal length of -8.7 cm. How far in front of the lens should the object be placed
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