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A 5.5 g dart is fired into a block of wood with a mass of 22.6 g.The wood block is initially at rest on a 1.5 m tall post. After thecollision, the wood block and dart land 2.5 m. from the base of thepost. Find the initial speed of the dart.
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.7 m, and the centripetal force acting on the ball, What is the speed of the ball in orbit
The inductive reactance of an RLC circuit is 36ohm. If the frequency is doubled, what is the new inductive reactance
In one day, a 90kg mountain climber ascends from the 1520m level on a vertical cliff to the top at 2360m, What is her change in gravitational potential energy on the first day
One hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0.100 m2. The circuit is completed by connecting the coil to a 10-ohms resistor. As the magnetic field along the coil axis changes from 1.00 T to 4...
An isolated charged conducting sphere of radius 12.0 cm creates an electric field of 4.90 104 N/C at a distance 22.0 cm from its center. What is its surface charge density
You throw a ball straight down from an apartment balcony to the ground below. The ball has an initial velocity of 4.95 m/s, Find the height of the balcony
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.9 kg · m2. What is the resulting angular speed of the student and the stool
A flywheel having constant angular acceleration requires 4.60 to rotate through 170 . Its angular velocity at the end of this time is 104. Find the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 59-m-diameter, What is the car's speed at the top
A square loop 10cm on a side carries a current I' = 1A, and is placed 10cm away from a long,straight wire of current I = 10A, Calculate the net force on the loop
If the laser light wavelength is 1062 (this corresponds to a Neodymium-YAG laser), how many wavelengths are found within the laser pulse
A box (m1=1.2 kg) is being pulled up an (not necessarily frictionless) incline by another mass (m2=0.85 kg), which is descending straight down. How much energy did the hanging mass lose
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