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A 102g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
a force of magnitude 7.50 N pushes three boxes with masses m1 = 1.30 kg, m2 = 2.80 kg, and m3 = 5.30 kg. Find the magnitude of the contact force between boxes 1 and 2
A 0.2436-g sample of an unknown substance was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779g/mL. The freezing-point depression was 2.5ºC. Calculate the molar mass of
When measuring the boiling point of a compound, why is the micro boiling point determined at the point when the last bubble has left the bottom of the bell and the liquid begins to rise in the bell
A block of wood, with density 780 kg/m3 has a cubic shape with wides 0.330 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. What is the mass of the lead
If you touch the terminal of a battery, What current will pass through your body if you touch the two terminals of a 9.0 V battery with your two hands
When taking a boiling point of a compound, why is the micro boiling point determined at the point when the last bubble has left the bottom of the bell and the liquid begins to rise in the bell
A 190? resistor is connected to an AC source withE0 = 14V. What is the peak current through the resistor if the emf frequency is 100 Hz
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversib
What is the critical angle for light at the glass-liquid interface when the glass with n = 1.54 is immersed in water
Draw the structures of the products of the neutralization reaction between pyridine and propanoic acid.
A large arm model was constructed with a free arm which weights 1 kg, an additional weight of 1 kg is supported by the arm at a distance of 12 cm from the pivot. What is the total torque of the resis
Draw the structures of the products of the neutralization reaction between methylamine and pyridinium ion.
A 56.0kg cheerleader uses an oil-filled hydraulic lift to hold four 110kg football players at a height of 1.30m. find the diameter of the football players' piston
Devise a version of the van't Hoff equation that applies to vapor pressure by writing the equilibrium constant K for vaporization.
A uniform can with mass M and height H is filled to the top with water. The initial mass of the water is 2M, What is the minimum height of the center of mass as the water drains out
A barge floating in fresh water (? = 1000 kg/m3) is shaped like a hollow rectangular prism with base area A = 650 m2, Find the mass of the coal in kilograms
Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute and compare its density with the actual value of 7.87
A 0.900m -diameter vat of liquid is 2.60m deep. The pressure at the bottom of the vat is 1.40atm
A laser beam of power 4.40 W and diameter 2.70 mm is directed upward at one circular face of a perfectly reflecting cylinder, which is made to "hover" by the beam's radiation pressure
On average, how many collisions between nitrogen molecules and oxygen molecules will occur in one second in 1.00 cm3 of air at 25oC and 1.00 bar
An artificial earth satellite has a circular orbit of radius 7.10 multiply.gif 106 m in an equatorial plane. Compute the (constant) speed of the satellite
Light inside an optical fiber tube hits the wall between the tube and air. What is the index of refraction of the tube
Calculate the percentage of He atoms at 100oC which have speeds in the range between 1200 m/s and 1300 m/s. Calculate the percentage of these He atoms that have speeds greater than 5000 m/s
At what pressure does the mean free path of argon at 25 C become comparable to the diameter of a spherical vessel of volume 1.0 dm^3 that contains it? Take ? =0.36nm^2.