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a small ball rolls off the roof edge of a building with a horizontal speed of 23ms the ball hits the ground a distance
a parallel-plate vacuum capacitor has 856j of energy stored in it the separation between the plates is 380mm if the
a capacitor is made from two hollow coaxial iron cylinders one inside the other the inner cylinder is negatively
a square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field the square loop is then
show that when a region filled with cavity radiation quasistatically and adiabatically expands or contracts the
a single household circuit operates at 120 v and is protected by a 10 a circuit breaker how many 50 w lamps can be
a 3 ohm resistor is mounted in parallel with a resistor r11 ohm and this combination is connected in series with an 4
a parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material the
a helicopter is lifting two crates simultaneously one crate with a mass of 160 kg is attached to the helicopter by
a 29-kg toy locomotive is pulling a 17-kg caboose the frictional force of the track on the caboose is 054 n backward
the power stroke of the myosin protein on an actin filament that generates tension in a muscle appears to be a 10 nm
two workmen are stacking heavy cinder blocks from the ground to a raised pallet if one of them stacks 100 of the blocks
two trains each having a speed of 30 kmh are headed at each other on the same straight track a bird can fly 60kmh flies
find the escape velocity for a partical on a spherical planet of radius r and mass m what is the numerical value for
the potential for a mass hanging from a spring is vyky22mgy when y0 corresponds to the position of the spring when
chadwick is pushing a piano across a level floor he piano can slide across the floor without friction if chadwick
the four particles form a square of edge length a 490 cm and have charges q1 640 nc q2 -617 nc q3 841 nc and q4
superman throws a boulder of weight 2400n at an adversary what horizontal force must superman apply to the boulder to
two children who are bored while waiting for their flight at the airport decide to race from one end of the 20 -long
a graph depicts force versus position what represents the work done by the force over the given displacementa the work
if the net work done on an object is zero what can you determine about the objects kinetic energya the objects kinetic
a parallel-plate capacitor has capacitance 650 microfa how much energy is stored in the capacitor if it is connected to
an object moves in a circular path at a constant speed what is the direction of the net force acting on the objecta the
a warehouse worker pushes a crate along the floor by a force of 70rm n that points downward at an angle of 45circ below
in the amusement park ride known as magic mountain superman powerful magnets accelerate a car and its riders from rest