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A small ball with a mass of 55.0 g is loaded into a spring gun, compressing the spring by 15.0 cm. When the trigger is pressed, the ball emerges horizontally from the barrel at a height of 1.70 m above the floor. It then strikes the floor, after traveling a horizontal distance of 2.40 m. Use g = 9.80 m/s2. Assuming all the energy stored in the spring is transferred to the ball, decide the spring constant of the spring.
An 8.00 point mass and a 15 point mass are held in place 50 apart. A particle of mass is released from a point between the two masses 13.00 from the 8 mass along the line connecting the two fixed masses.
Water at 33.0 °C is sprayed onto 0.156 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is the minimum mass of water that must be used?
A student is reading material written on a blackboard. Her contact lenses have a refractive power of 57.50 diopters; the lens-to-retina distance is 1.750 cm. How far (in meters) is the blackboard from her eyes
a charge q1 q is positioned on the x axis at x a. where should a charge q2 9q be placed to produce a net electric
a parallel-plate capacitor is made from two aluminum-foil sheets each 5.7 cm wide and 5.6 m long. between the sheets is
1 the electric potential energy stored in the capacitor of a defibrillator is 83 j and the capacitance is 124 microf.
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
A block of wood with volume V floats in water with 0.65V submerged. In oil the block floats with 0.84V of its volume submerged
q1. suppose a chimpanzee swings through the jungle on vines. if it swings from a tree on a 13 m long vine that starts
A person with a nearsighted eye has near and far points of 20 cm and 26 cm, respectively. Assuming a lens is placed 1.4 cm from the eye, what power must the lens have to correct this condition? If I have found this answer to be -4.065 diopter, what w..
A pulley system has an efficiency of 87.5 percent. How much of the rope must be pulled in if a force of 648 N is is needed to lfit a 150kg desk 2.46m .
Briefly describe how the resulting interference pattern will differ for the various types of particles - the shower of particles will scatter in all directions with equal probability. Is it possible to determine in advance the trajectory of any in..
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