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Questions:
TimeLeft: Posted: 
Physics
A string is wrapped several times around the rim of a small hoop with a radius of 8.00×10−2 and a mass of 0.180 .
If th more... 
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Oct 26th 
A liter of water has a mass of 1000 g. What is the density of water?
(Hint: 1 mL = 1 cm3) more... 
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Oct 25th 
A Liter of water has a volume of 2270 cm3 and a mass of 454g. What is the density of the bread? (Hint: 1mL = 1cm3) HELP!! more... 
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Oct 25th 
A hypothetical planet has a radius 2.3 times that of earth, but has the same mass. What is the acceleration due to gravity near its surface? more... 
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Oct 25th 
Tarzan plans to cross a gorge by swimming in an arc from a hanging vine(shown in the figure). If his arms are capable of exerting a force of 1800 N o more... 
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Oct 25th 
Estimate the force a person must exert on a string attached to a .11 kg ball to make the ball revolve in a horizontal circle of radius .6 m. The ball more... 
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Oct 25th 
On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere. This satellite was injected into an orbit 705k more... 
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Oct 24th 
If the net force on an object is zero, does the net torque on the object have to be zero? Why? more... 
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Oct 23rd 
A heavy man and a lightweight girl are balanced on a massless seesaw. If they both move forward so that they are onehalf their original distance from more... 
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Oct 22nd 
A potter's wheel with a moment of inertia of 8.0 kg m^2 has 5.0 N m applied to it. It starts from rest. 10.0 seconds later it has gained what k more... 
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Oct 22nd 
Consider two uniform solid spheres where one has twice the mass and twice the diameter of the other. The ratio of the larger moment of inertia to that more... 
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Oct 22nd 
A bicycle is moving 4.0 m/s. What is the angular speed of a wheel if its radius is 30.0 cm?
(a) 4.8 rad/s
(b) 7.6 rad/s
more... 
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Oct 22nd 
A wheel of diameter 0.70 m rolls without slipping. A point at the top of the wheel moves with a tangential speed of 2.0 m/s. (a) At what speed is the more... 
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Oct 22nd 
Europa, a moon of Jupiter, has an orbital diameter of 1.34 x 10^9 m, and a period of 3.55 days. What is the mass of Jupiter? more... 
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Oct 22nd 
In space a 4.0 kg metal ball moving 30.0 m/s has a headon collision with a stationary 1.0 kg ball. After their perfectly elastic collision, what are more... 
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Oct 22nd 

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