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A point on the surface of a solid sphere (radius = 0.806 m) is attached directly to a pivot on the ceiling. The sphere swings back and forth as a physical pendulum with a small amplitude. What is the length of a simple pendulum that has the same period as this physical pendulum?
Two soccer players start from rest, 45 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
you send a beam of light from a material with index of refraction 1.23 into an unkown material. in order to help
a person whose weight is W = 658 N doing push-ups. Find the normal force exerted by the floor on each hand
A tennis ball is thrown straight up with an initial speed of 20 m/s, What is the ball's acceleration at its maximum height
The trap-jaw ant can snap its mandibles shut in as little as 1.6x10-4 s. In order to shut, both mandibles rotate through a 87° angle. What is the average angular velocity of one of the mandibles of the trap-jaw ant when the mandibles snap shut?
A 1260 kg is pulling a 335 kg trailer. Together the car and trailer have the acceleration of 2.15 m/s squared. Find out the net force on the car-trailer combination.
A copper wire of radius a = 0.331 mm has an aluminumjacket of outer radius b = 0.459 mm. There is a currenti = 2.23 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8Ω·m and2.75 x 10-8Ω·m.
A straight vertical wire carries a current of 1.45 Amp downward in a region between the poles of a large electromagnet where the field strength is 0.585 T and is horizontal. Find the direction of the magnetic force on a 1.80 cm section of this wir..
Two Hydrogen atoms, both with electrons in ground state, are brought close together. What is the angular momentum of an electron in a Hydrogen ground state
Two sinusoidal waves traveling in opposite directions interfere to produce a standing wave with the wave function y = (2) sin(0.5x) cos(500t), Determine the wavelength of the interfering waves
A subway train rounds an unbanked curve at 70 km/h. Find what is the radius of the turn
The track for a racing event was designed so that riders jump off the slope at 30 angle, from a height of 5 ft. Determine the maximum height he attains
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