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A 2 kg mass hangs motionless from a partially stretched spring having a spring constant of 177 N/m. What is the magnitude of the force (in N) that would be required to pull the mass down by an additional 7 cm?
A 1.0mL syringe has an inner diameter of 6.0mm , a needle inner diameter of 0.29 mm , and a plunger pad diameter (where you place your finger) of 1.2 cm . A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100mmHg...
A molecule of DNA (deoxyribonucleic acid) is 2.26 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
Calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density thickness. Show your work.
If the average energy released in a fission event is 208 MeV, calculate the total number of fission events required to operate a 140 W lightbulb for 6.00 hr
A 1250 kg car is moving at 18.7 m/s. Then, 203 kJ of work is done on the car to increase its speed. What will be the car's new speed
The four tires of an automobile are inflated to a gaugepressure of 2.3 105 Pa.Each tire has an area of 0.024m2 in contact with the ground. Determine the weight of the automobile
A cubical block of wood 10cm on a side, floats at the interface between oil and water with its lower surface 1.50 cm below the surface
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 80.5 kg and a radius R = 0.625..
The displacement of a standing wave on a string is given by D = 9.9 sin(0.55x)cos(56t), where x and D are in centimeters and t is in seconds. What is the distance (cm) between nodes
A 2.0 kg ball is thrown at the suspended 29.4 kg block with a velocity of 3.5 m/s. The coefficient of restitution between the ball and the block is e = 0.69. What is the maximum height h to which the block will swing? (mm)
3.00 m-long, 350 steel beams extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 construction worker stands at the far end of beam.
A car traveling at 24 m/s runs out of gas while traveling up a 9 degree slope. How far will it coast before starting to roll back down.
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