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A 3.0-kg particle has a position vector given by r=(2.0t^2i+3.0j) where r is in meters and t is in seconds. What is the angular momentum of the particle, in kg×m^2/s, about the origin at t = 2 s?
a 5000kg rocket takes off from the surface of the earth with an initial speed of 20m/s. determine the acceleration of the rocket
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
A loud speaker diaphragm is producing a sound for 2.5s by moving back and forth in simple harmonic motion. How many times does the diaphragm move back and forth
When an AC source is connected across a 15.0-? resistor, the rms current in the resistor is 7.10 A. Find the rms voltage across the resistor. Find the peak voltage of the source. Find the maximum current in the resistor
An isolated conductor has a net charge of +7.90*10^- 6 C and a cavity with a particle of charge q = +2.30*10^-6 C, find the charge on the cavity wall and outer surface
Two men decide to use their cars to pull a truck stuck in mud. What is the net forward force exerted on the truck in the direction it is headed
A 100 W lightbulb is plugged into a standard 120 V outlet. How much does it cost per month (30 days) to leave the light turned on continuosly? Assume electrical energy costs 7.5/kWh. (Enter dollars with no unit) What is the resistance of the bulb? Wh..
The average density of a fish can be found by first weighing it in air and then finding the scale reading for the fish completely immersed in water, what is the average density of the fish
A3.50-kg block starts from rest at the top of a 30.0° incline and slides a distance of1.90m down the incline in1.80s. Find the magnitude of the acceleration of the block
The initial kinetic energy of the neutron is 2.50X10^-13 J. Find its final kinetic energy
A 23 bullet traveling 240 penetrates a 4 block of wood and emerges going 170. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
An Atwood machine is made with masses M1 = 100 g, M2 = 120 g, and pulley mass of 100 g. What is the percent error in acceleration
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