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A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, which is 167 (550 ) tall, and to have the image on the film be 5.0 high. How far should she stand from the Washington Monument?
A loaded railroad car of mass 6000 kg is rolling to the right at 2.0 m/s when it collides and couples with an empty freight car of mass 3000 kg, What is the velocity of the pair after the collision
The position and momentum of a 3.01 keV electron are simultaneously determined, what is the minimum percentage uncertainty in its momentum
0.75mol of argon gas is admitted to an evacuated 70cm3 container at 40 degrees C. estimate the final pressure of the gas
Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second. If a person blows air at this rate through a drinking straw with a diameter of 0.60 cm, what is the speed of air in the stra..
A turtle ambles leisurely-as turtles tend to do-when it moves from a location with position vector r1,x = 1.01 m and r1,y = -2.99 m in a lettuce garden to another location, What are the components and the magnitude of the turtle\'s average velocity
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.02 kg, Find the new angular speed of the student
q1. a vertical electric field of magnitude 3.00 multiplied by 104 nc exists above the earths surface on a day when a
A roller-coaster vehicle has a mass of 506 kg when fully loaded with passengers, If the vehicle has a speed of 19.0 m/s at point A, what is the force of the track on the vehicle at this point
If the x- and y-axes both carry a linear charge density of 3 nC/m, what is the electric flux through a spherical surface of radius 10 cm centered at the origin
Draw vectors indicating the normal force. suppose that the weight of the femur is negligible compared to the applied downward force.
A tank of water sits at the edge of a table of height 0.9 m. The tank springs a very small leak at its base, What is the water level h in the tank
Their motions have equal periods, but the radius of skater A's circle is half that of skater B's circle. Evaluate the ratio of the magnitudes of the forces acting on each skater?
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