Thursday
December 12, 2013

# Posts by elizabeth

Total # Posts: 773

Physics
A rotational axis is directed perpendicular to the plane of a square and is located as shown in the drawing. Two forces, 1 and 2, are applied to diagonally opposite corners, and act along the sides of the square, first as shown in part a and then as shown in part b of the draw...

Physics
A square, 0.36 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. The axis is perpendicular to the plane of the square. A force of 14.4 N lies in this plane and is applied to the square. What is the magnitude of the maximu...

Physics
The wheel of a car has a radius of 0.390 m. The engine of the car applies a torque of 282 N · m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road must be applying a force of static friction to the wheel that produces a ...

algebra 2 trig
8/2+√6

Chemistry
Okay. Please check. If you can please show me how its done when you put it together. I have it scattered so I was a bit stuck when I tried to do each step. I know dimensional analysis allows the cross cancelling when you do it on paper and its hard to see whats cancelled in ea...

Chemistry
I don't know exactly how to start this question: A sample gas contains 2.95 x 10e24 molecules. The sample is 21.0% oxygen. Calculate volume of oxygen in liters assuming oxygen has a density of 1.308 g/L. Please help me how to do this. I have been stuck and still trying to ...

Chemistry
Ok. Please. Check. Thank you both so much. Mass of water: 43.0-26.1=16.9 g H2O Moles of water: (16.9 g H2O)(1 mol H2O/18.0 g H2O)= 0.939 mol H2O Moles of cobalt (II) sulfite: CoSO3= 58.9332+32.066+3(15.9994)=138.9974 g/mol (26.1 g CuSO3)(1 mol CuSO4/138.9974 g CuSO3)= 0.188 mo...

Chemistry
A 43.0 g sample of hydrated cobalt (II) sulfite is heated to drive off the water. The anhydrous cobalt (II) sulfite has a mass of 26.1 g. Calculate the mass of water. Calculate the moles of water. Calculate the moles of cobalt (II) sulfite. Calculate the mole ratio of water to...

Science
For periodic waves, frequency has an inverse relationship to the concept of wavelength. Frequency is inversely proportional to wavelength λ (lambda). The frequency f is equal to the phase velocity v of the wave divided by the wavelength λ of the wave. f= v/w In elect...

Physics
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 92.5 kg. The mass of the rock is 0.310 kg. Initially the wagon is rolling forward at a speed of 0.550 m/s. The...

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