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If the mass of the block is 0.167 kg and has an original speed of 0.70 m/s at a radius of 0.4 meters, what is the tension in the cord in the final situation at a radius of 0.2 meters when the block
Why do chemists prefer to read/record the absorbance, rather than the percent transmittance, of light (electromagnetic radiation) when analyzing a sample having a visible color?
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
What would be the freezing point of the solution if 175 g of sodium chloride (NaCl) is added to 1.00 kg of water? Kf of water is1.86 ºC·kg/mol.
Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 x 10^9 J.
A 1.526 g sample of a polymer dissolved in 1.00 L of a benzene solution at 22°C has an osmotic pressure of 4.52 x 10-2 atm. What is the molar mass of the polymer?
The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final angular velocity in 7.4 s. How long does it take for the second sheet, starting from rest, to reach t
When a 35-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 120 rad/s2. What is the mass of the disk?
When .514g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 degrees C to 29.4degrees C. Find delta E(rxn) for the combustion of biphenylin kJ/mol.
A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 25 rad/s in 0.67 s. Assuming the CD is a uniform solid
A 25.5g Al block is warmed to 65.4 degrees C and plunged into an insulated beaker containing 55.2g water initially @22.2 degrees C. The aluminum and water are allowed to come to thermal equilibrium.
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 9.1 rad/s. The wheel has a radius of 0.35 m. If you ride the bike for 2060 s, h
Dana has a sports medal suspended by a long ribbon from her rearview mirror. As she accelerates onto the highway, she notices that the medal is hanging at an angle of 12^\circ from the vertical.
One tablespoon of peanut butter has a mass of 16 g. It is combusted in a calorimeter whose heat capacity is 120.0kJ/C. The temperature of the calorimeter rises from 22.2 degrees C to 25.4 degrees C.
A physics instructor in an anteroom charges an electrostatic generator to 25uC, then carries it into the lecture hall. Find the net electric flux, in Nm^2/C, through the lecture hall walls.
How many grams of table salt would have to dissolved in 130.0 g ofwater to lower the freezing point by 1.10 degrees celsius?kf = 1.86 K-kg/mol for water.
A diverging lens (f = -11 cm) is located 20.0 cm to the left of a converging lens (f = 34.0 cm). A 3.00 cm tall object stands to the left of the diverging lens, exactly at its focal point. (a) Dete
A) What is the direction of the electric field at P due to the charge +Q on the top half of the rod?
If hydrolysisof a protein is continued until the biuret test becomes negative,what can be concluded regarding the extent of hydrolysis?
Where should the parent push if the mass of the teeter totter were doubled?
Calculate the energy gap between the excited and ground states for the sodiumion. d) if you soaked the pickle for a long time in a different salt solution, such as strontium chloride, would you stil
(a) How far (in meters) from the lens must the screen be located if a slide is placed 108.85 mm from the lens? (b) If the slide measures 24.0 mm 36.0 mm, what are the dimensions (in mm) of its image?
The electromagnet of a bell is constructed by winding copper wire around a cylindrical core, like thread on a spool. The diameter of the copper wire is 0.45mm, the number of turns in the winding is
A circular coil lays flat on a horizontal table in a region where the magnetic field is straight down. The magnetic field is suddenly removed. When viewed from above, what is the direction of the cu
A loudspeaker is placed between 2 observers who are 110 meters apart along a line connecting them. if one observer records a sound level of 60 dB and the other records a sound level of 80 dB, how fa