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Q. A small steel ball bearing with a mass of 10.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.31 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg from the horizontal.
Q. A small remote-control car with a mass of 1.58 moves at a constant speed of = 12.0 in a vertical circle inside a hollow metal cylinder that has a radius of 5.00 .What is the magnitude of the normal force exerted on the car by the walls of the cylinder at a) point A (at the bottom of the vertical circle)? b) point B (at the top of the vertical circle)?
In the lungs there are tiny sacs of air that are called alveoli. An oxygen molecule (mass = 5.30 x 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.140mm. What is the minimum improbability in the velocity of this oxygen ..
How much work done against force of gravity
find the distance along the ground, measured from a point directly beneath the point of release, to where the package hits the earth.
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
A certain car battery with a 14.0 V emf has an initial charge of 195 A•h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how long in hours can it deliver energy at the rate of 184 W.
Two long parallel wires each carry a current of 5. A directed to the east. The two wires are separated by 8 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires.
A three-phase synchronous generator is connected to a step-up transformer T1, which is connected to a 60km long transmission line. As the far end of the line, a step-down transformer bank T2 is connected. The secondary of T2 supplies two loads L..
If a parallel mirror He-Ne laser had a homogeneous line shape with v=1.5GHz, and small signal peak coefficient of .001/cm length=100cm and reflectance's 100 percent and 97 percent, how many longitudinal modes would initially contribute to the laser o..
What is the terminal speed for an 79 skier going down a 36 snow-covered slope on wooden skis = 0.060? Assume that the skier is 1.8 m tall and 0.50 m wide.
What was the ray's angle of incidence on the diamond. What should be the magnitude of , so that the net work done by it and the kinetic frictional force is zero.
Find out the magnitude of the electric field at a point P on the y-axis 0.529 m from the origin. The value of the Coulomb constant is 8.99 × 109 N • m2/C2.
A 3000 flask is initially open while in a room containing air at 1 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, flask is opened and air is allowed to esc..
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