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A 2 kg car moving towards the left at 4 m/s collides head on with an 8 kg car moving towards the right at 2 m/s, and they stick together. After the collision, the velocity of the combined bodies is
two small charges with a mass of 1 gram each are connected by 2 cm long insulating rod of negligible mass. Obtain the moment of inertia around the center of mass
Lead has a critical temperature of 7. 2 K and a critical field at 4. 2 K of 430 A/cm. (a) What is the critical field at T = 1 K? (b) At 4. 2 K, how much current can a 1-mm-diameter lead wire carry without resistance?
A projectile is launched into the air with an initial speed of vi at an launch angle of 30 degrees above the horizontal. The projectile lands on the ground 2.0 seconds later. Calculate initial velocity.
When a certain spring is stretched by an amount x, it produces a restoring force of F(x) = ax=bx^2, where a and b are constants. How much work is done through an external force in stretching the spring by an amount D from its equilibrium length.
A certain substance has a dielectric constant of 2.8 and a dielectric strength of 18.0 MV/m. If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of ..
the right triangle with vertex P at the origin, base b, Determine the potential at the vertex P
It is observed that the size of a real image formed by a concave mirror is three times the size of the object when the object is 31.2 cm in front of the mirror. What is the radius of curvature of this mirror
The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. What is the resistance of the ion channel
a rubber ducky falls from a bridge that is y41.7 m above the river that passes beneath it. the ducky lands in a model
3 30 pound kegs are stacked on a dolley (2 on top of each other and the third on top of both of them opposite of the dolley back (they form kind of a triangle)). Calculate the force the dolley wheel exerts ON the floor
Compute the electric field intensity by using the magnetic field found in part (a). Now check to see that this boundary condition is satisfied to linear terms.
The depth of the pacific ocean in the Mariana Trench is 11 km. What is the pressure at this depth? (density of sea water is 1.025x10^3 kg/m^3.
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