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A firecracker is tossed straight up into the air. It explodes into three pieces of equal mass just as it reaches the highest point. Two pieces move off at 110 m/s at right angles to each other. How fast is the third piece moving?
A charge of -3.0 nC is at the origin and a second charge of 13.0 nC is at x = 8.00 m. Find the magnitude and direction of the electric field halfway in between the two charges.
Airtight box has a removable lid of area 1x10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85x 10^5Pa. The inside of the box is completely evacuated. What is the magnitude of the force essen..
If the current in the solenoid is ramped at a constant rate from zero to Is= 1.20 A over a time interval of 79.0 ms, What is the mutual inductance between the solenoid and the short coil
A satellite is spinning at 0.01 rev/s. The moment of inertia of the satellite about the spin axis is 2000 kg * m^2. At what rate will the satellite be spinning after 30 pulses
25g of copper pellets are removed from a 300 degrees C oven and immediately dropped into 90 mL of water at 25 degress C in an insulated cup. What will the new water temp be
In a series R-L-C circuit, L = 0.205H , C = 80.5?F and the voltage amplitude of the source is 260V, What is the resonance angular frequency of the circuit
A certain superconducting magnet in the form of a solenoid of length 1.20 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. Find the number of turns in the solenoid
Two rays leave a point source and strike a front-silvered mirror, making angles with the normal of 30.0° and 52.5°, respectively. What is the angle between the two reflected rays
Old MacDonald had a farm, and on that farm he had a gate (see below). The gate is 3m wide and 1.8m high, with hinges attached to the top and bottom. The guy wire makes an angle of 300 with the top of the gate and is tightened by a turn buckle to a..
Dave Johnson, the bronze medalist at the 1992 Olympic decathlon in Barcelona, How far does his center of mass move up as he makes the jump
A 0.54 cm high object is placed 8.7 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image
You are trying to hit a cart of mass 0.3 kg on a frictionless table with a toy projectile launcher. At what angle relative to North do you want to fire the projectile
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