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The moment of inertia of a 4.0m long board pivoted at its center is 25kgm2. Find the moment of inertia when it is used as a see-saw with two 50kg kids sitting 1.8mm from the pivot.
q1.the density of the tightly compressed sugar cube is about 1.4 1.4gml. if a sugar cube weighs very close to 5 grams
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to three times the earth's radius of 6.38 106 m
The treasure map in the figure gives the following directions to the buried treasure, Which direction should you go to reach the treasure and How far should you go to reach the treasure
A photon with energy 1.85 eV is absorbed by a hydrogen atom. Find the speed of the electron released from the state in part (a) when it is far from the nucleus
A lady pushes down on a 35.0 kg crate (constrained to move along a horizontal floor) at an angle of 47.3 degrees to the horizontal with a force of 125N along a frictionless surface. what is the normal force of the surface on the crate
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved? 2. The change in angular momentum with the change in time is equal to what?
question an airplane with an average cross sectional area 10 meters squared experiences a lift force of 60 000 n. what
The downward acceleration of a 74-kg stuntwoman near the end of a fall from a very high building is 5.5m/s2
In an experiment designed to measure the speed of light, a laser isaimed at a mirror that is 59.0 km due north. A detector is placed122 m due east of the laser. The mirror is to be aligned so thatlight from the laser refelects into the detector.
A figure skater is spinning at a rate of 1.2 rev/s with her arms outstretched. What is her new rate of rotation
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
A certain black body radiates 1200 W at a temperature of 2000 K. how much power does this body radiate at 3000 K
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