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You push your physics book 1.70{\rm m} along a horizontal tabletop with a horizontal push of 2.80{\rm N} while the opposing force of friction is 0.700{\rm N} . What is the net work done on the book?
An astronaut is traveling in a space vehicle that has a speed of 0.485c relative to Earth. The astronaut measures his pulse rate at 77.5 per minute. What pulse rate does the Earth observer measure
A 350-kg roller coaster starts from rest at point A and slides down the frictionless loop-the-loop, How fast is this roller coaster moving at point B
At one instant a bicyclist is 75m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then, 10s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 20.0 m/s.
An electron and a proton are accelerated starting from rest through a potential difference of 10 million volts. Find the momentum (in MeV/c) and the kinetic energy (in MeV) of each
Two polarizers are aligned to the angle between their polarization direction is 45 degrees. what fraction of the incident intensity is transmitted though the second
Does the pivot point (i.e., the triangle in the diagram upon which the ruler balances) exert a force on the ruler? Does it exert a nonzero torque about the pivot.
Two concentric metal spheres are found to have a potential difference of 846.0 V when a charge of 3.186·10-8 C is applied to them. What is the radius of the inner sphere
Suppose an initial speed of 21.4 m/s, at an angle of 61.10° with respect to the positive x axis. Find the velocity at time t0; enter x component, after that the y component.
Two spheres are cut from a certain uniform rock. One has radius 4.30cm. The mass of the other is six times greater. Find its radius.
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.8 m/s at ground level. What is its maximum altitude
A woman with mass 50.5kg is standing on the rim of a large disk that is rotating at 0.505rev/s about an axis perpendicular to it through its center. Calculate the magnitude of the total angular momentum of the woman-plus-disk system
How long does it take the projectile to reach the top of its trajectory? Explain how high does the projectile go before it begins to fall?
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