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A weather vane initially at rest has a moment of inertia of 0.107 kg · m2 about its axis of rotation. A 33.5 g piece of clay is thrown at the vane and sticks to it at a point 18.5 cm from the axis. The initial velocity of the clay is 20.5 m/s, directed perpendicular to the vane. Find the angular velocity of the weather vane just after it is struck.
An investigation is performed using a apparatus. Electrons are accelerated from rest from the cathode by an electric potential difference. The cathode and anode are 2.00 x 10 ^-2 cm apart. The electrons reach a speed of 2.10 x 10^7 m/s as they pas..
A 5 kg mass is attached to a 1-m long string. If the speed of the mass at the bottom of the swing is 3 m/s, what it the force in the string at this point
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 585 nm, What is the difference in path lengths from the two slits to the location of a fifth order bright frin..
How much energy is stored by the electric field between two square plates, 6.0cm on a side, separated by a 1.0mm air gap
A baseball pitcher can throw a fastball at a speed of ~150 km/hr. what is the largest size spherical asteriod of density p = 3 g cm^-3 from which he can throw the ball fast enough that it: a) escapes from the asteroid into heliocentric orbit?
a ray of light from the coin travels to the surface of the liquid and is refracted as it enters into the air. how fast is the light traveling in the liquid
Find the approximate mass of the dark and luminous matter in the Milky Way galaxy. Assume the luminous matter is due to approximately 1011 stars of average mass 1.5 times that of our sun
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him, What is the force of friction between the losing player's feet and the grass
A 4.5-kg, three legged stool supports a 68-kg person. If each leg of the stool has a cross-sectional diameter of 3.0 cm, determine the pressure exerted on the floor by each leg
The two springs each have a spring constant of 11. They are stretched by 1 as a current passes through the wire. How big is the current.
A 2000-kg car accelerates uniformly from rest to 30 m/s in a time of 20 s. What is the net force acting on the car
A small mirror is attached to a vertical wall, and it hangs adistance of 1.82 m above the floor. The mirror is facing due east,and a ray of sunlight strikes the mirror early in the morning andthen again later in the morning.
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