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A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the other half. This bent object is rotating at an angular velocity of 6.2 rad/s about an axis that is perpendicular to the left end of the rod and parallel to the rod's upward half. Without the aid of external torques, the rod suddenly assumes its straight shape. What is the angular velocity of the straight rod?
a solid, uniform sphere (r=20 cm, density= 850 kg/m cubed) is attached by a massless cable to the ceiling of a room, find the apparent weight (the reading on the scale) when the cable tension is
An 805-kg race car can drive around an unbanked turn at a maximum speed of 54 m/s without slipping. What would be the maximum speed if no downforce acted on the car
Air (density = 1.29kg/m^3) passes over the top and bottom surfaces of an aircraft whose effective wing area is 75.5m2. what is the mass of the plane
A factory worker pushes a 28.4 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32degrees below the horizontal. How much work is done on the crate by friction during this displacement
A 79-kg person is exposed to 83 mrem of α particles (RBE = 12). How much energy (in joules) has this person absorbed
A woman supports a 50 kg barbell at 90 degrees by contracting the biceps in both arms. how much force her biceps must produce to support the barbell
Concrete is pumped from a cement mixer to the place it is being laid, instead of being carried in wheelbarrows. Calculate the resistance of the hose
A Carnot engine whose high-temperature reservoir is at 580 K takes in 520 J of heat at this temperature in each cycle and gives up 309 J to the low-temperature reservoir.
A +45?C point charge is placed 42cm from an identical +45?C charge. How much work would be required for an external force to move a +0.70?C test charge from a point midway
To treat a burn on your hand, you decide to place an ice cube on the burned skin. How much heat is absorbed by the ice cube and resulting water
A projectile is launched from ground level to the top of a cliff which is 195m away and 155 m high, find the initial velocity of the projectile
In the process represented in the figure, 2.4 moles of an ideal monatomic gas start at state a, with pressure 1 atm (1.01*10^5 N/m^2), Find the net work done by the gas in one cycle
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