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The ends of a 9-lb rod AB are constrained to move along slots cut in a vertical plate as shown. A spring of constant k=3 lb/in. is attached to end A in such a way that its tension is zero when θ =- 0. If the rod is released from rest θ=0°, determine the angular velocity of the rod and the velocity of end B when θ = 0.
A ball of mass m is suspended from a rope of length R. the ball is set into freely swinging circular motion in a vertical plane. Find the centripetal acceleration of the ball at the bottom of the circle
What is the magnitude and direction of the net force on the box?
A Carnot engine with a hot-reservoir temperature of 360 has the same thermal efficiency. What is the cold-reservoir temperature in C?
Consider two masses, mp and mt, on a surface where friction is negligible. Write the expression for conservation of momentum in the x- and y-directions
Suppose that an electron in hydrogen has been excited to the n=6 orbit. What wavelength of light would be emitted
A parallel-plate air capacitor with a capacitance of 248pF has a charge of magnitude 0.134oC on each plate. The plates have a separation of 0.256mm . What is the potential difference between the plates?
A block of mass m = 4.2 kg, moving on a frictionless surface with a Vi=2.9m/s speed makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 4.2 block recoils with a speed of 0.9m/s. The mass M is closest to.
An electric field of 1.44 kV/m and a magnetic field of 0.363 T act on a moving electron to produce no net force. evaluate what is the electrons speed
Erin is late tp physics class and is coming down the hall as the bells are ringing. There are two bells in the hall, one at the far end and one in front of the classroom she is approaching.
A circular loop of wire with a radius of 0.8cm carries a current of 6 A. Determine the direction the loop will want to rotate. Indicate the direction of rotation on the diagram.
a chinook wind blowing at 800mb has a temperature of 311k and a mixing ratio of 4gkg. is this the same as the air at
A singly charged ion of mass m is accelerated from rest by a potential difference ?V. What is the ratio of the masses of the ions
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