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Two charges are placed on the x axis. One of the the charges (q1=+8.5µC) is at x1=+3.0 cm and the other (q2= -21µC) is at x1=+9.0 cm. Find the net electric field (magnitude and direction) at a) x= 0 cm and b) x= +6.0 cm
A 3.0cm tall object is 50cm in front of a convex mirror that has a -20 cm focal length. Calculate the image position in cm behind the mirror
A heat engine operates between a high-temperature reservoir at670K and a low-temperature reservoir at 320 K. What is the magnitude of the net change in entropy as a result of this cycle
A spring-loaded toy gun is used to shoot a ball of mass straight up in the air, Find v_m the muzzle velocity of the ball
A sphere of radius 1.0 cm is dropped into a glass cylinder filledwith a viscous liquid. The mass of the sphere is 12.0 g and thedensity of the liquid is 1200 kg/m3. The sphere reaches a terminalspeed of 0.15 m/s. What is the viscosity of the liquid?
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
ashlee pulls andy on a skateboard. ashlee pulls with a force of 52.2n to get it moving and 42.0n to keep it at a
Analyse average density of the white dwarf
A raft is 3.9 m wide and 6.5 m long.When cargo is loaded onto the raft, it sinks 2.9 cm deeper into the water. What is the weight of the cargo
A neutron star is a stellar object whose density is about thatof nuclear matter. What would be its radius
Waves moving on a lake have a speed of 2.8 m/s and a distance of 1.6 m between adjacent crests. Find the period of the wave motion
A solid sphere with a radius of 0.70 m can be rotated about an axis through its center by a torque of 10.5 N *m which accelerates it uniformly from rest through a total of 180 revolutions in 15.0 s
A 4.25-kg watermelon is dropped fromrest from the roof of a 20.5-m-tallbuilding and feels no appreciable air resistance.
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