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A particle is acted on by two torques about the origin: τ1 has magnitude 10 N m and pointsin the direction of increasing x, and τ2 has a magnitude of 12N m and points in the direction of decreasing y.What are the magnitude and direction of dL/dt, where L is theangular momentum of the particle about the origin? Magnitude?Angle with respect to the x-axis.
A modern sculpture has a large horizontal spring, with a spring constant of 276 N/m, that is attached to a 51.0-kg piece of uniform metal at its end, By how much has the spring stretched
the number of radioactive nuclei present at the state of an experiment is 2.78e15. the number present twenty days later is 5.14e14. what is the half life in days of the nuclei
A 15 N horizontal force pushes a block weighing 4.8 N against a vertical wall, what is the force on the block from the wall
A grating is made of five similar, uniformly spaced, narrow slits. For light of wavelength ? = 675 nm perpendicularly incident on the slits, What is the angular position of the first principal order when the first and fifth slits are covered
A 0.10kg solid rubber ball is attached to the end of a 0.80 m length of light thread. The ball is swung in a vertical circle. Point p, the lowest point of the circle, is 0.20 m above the floor.
a spring without mass has natural length lo. one end is stuck to a fixed point and the other attached to a mass m. the
Consider the reaction 4He + 40Ca -> 3H + 21Sc Find the minimum laboratory kinetic energy for the 4He projectile if 40Ca is stationary
A series AC circuit contains a resistor, an inductor of 230 mH, a capacitor of 4.30 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. obtain the phase angle between the current and the source voltage
What are the volume and linear charge densities.
an 8.1g bullet is fired with a velocity of 109ms into a 98g block of wood at rest on a frictionless surface. the bullet
When you ride a bicycle at constant speed, almost all of the energy you expend goes into the work you do against the drag force of the air. how much power does she expend as she cycles
An unstable particle at rest breaks up into two fragments ofunequal mass. what is the speed of the heavier fragment
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