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While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 63-kg person develops a power of 79 W during a race, how fast is the person running? (Assume a running step is 1.5 m long.)
___________m/s
two masses are separated by 3.85m. the mass of objects are 5.98kg and 7.35 kg. how far is the center of mass of the system
It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. Find the direction of the bird's acceleration
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
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
A student shoots spitball at the wall from a height of 1.50 meters. The spitball has an initial horizontal velocity of Vxo, other than has no vertical velocity component. The spitball lands on the ground 8 meters from where it was shot. What is the V..
A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 72.4 x 10^5 kg, of which 11.5 x 10^5 kg is fuel. What is the rocket's thrust
My car has rear defrosters that are made of 13 wires embedded into the rear window. They can melt a thin layer of ice, What is the cross-sectional area of each wire
A hollow sphere of inner radius 6.8 cm and outer radius 7.8 cm floats half-submerged in a liquid of density 750 kg/m3. What is the mass of the sphere
Assume the 601 turns of wire are used to form a single-turn coil with the same shape but much larger area. What is the current if the maximum torque exerted on the coil by the field is 0.009 Nm
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8. Calculate the upward force on the puck in both situations
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. compute the overall magnification of the microscope
A stretched cord has a fundamental frequency of 144 Hz, a length of .9 m, and a mass of 2 g. What is the tension on the cord
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