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Take the mass of the earth to be 5.974x1024 kg, the mass of the sun to be 1.989x1030 kg, the radius of the earth to be 6.378x106 m, and the distance from the earth to the sun to be 1.49x1011 m. What is the gravitational force of the sun on the earth?
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source, What is the potential difference across the source
Mary Healy, the young woman with severe vaginal bleeding, is admitted to emergency room. She is three months pregnant, and physician is concerned about the volume of the blood she is losing.
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. Explain how many seconds after it is fired does it reach max height?
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force
A 0.5 kg dart is fired vertically from a spring gun that has spring constant of 4000 N/m. Determine maximum height reached by dart.
A beam of unpolarised light with a power of 70 mW is passed through two polarisers in series, with their polarisation directions parallel to each other. What is the maximum power that can be transmitted through the two
A professor's office door is 0.89m wide, 2.0m high, and 4.0cm thick; has a mass of 25kg ; and pivots on frictionless hinges. When the door is open and at rest, the door closer exerts a torque of 4.5N?m
An air-filled toroidal solenoid has a mean radius of 15.0 and a cross-sectional area of 5.02, What is the least number of turns that the winding must have
a sound wave traveling in 26 degrees C air has a pressure amplitude of 0.500 Pa. (assume that the density of air is 1.29 kg/m^3). What is the intensity of the wave
A 1410-kg racecar is driving around a circular track of radius 161 m. What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
A ball is fired at an angle of 45 degrees from ground level in the absence of air resistance. If the maximum range is 27m then what is its inital speed and what is the time of flight
A production line inspector wants a mirror that produces an upright image within magnification of 7.4 when it is located 15 mm from a machine part.
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