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Q. At a large business, employees must report to work at 7:30 A.M. The arrival times of employees is approximately symmetric and mound-shaped with mean 7:22 A.M. and standard deviation 4 minutes. a psychological study determinded that the typical worker needs 5 minutes ti adjust to thie surroundings before beginning duties. what percent of his business' employees arrive early enough to make this adjustment?
Q. The springs of a 512-kg motorcycle have an effective force constant of 9130 N/m.
By what percent does the period of oscillation change when a 95 kg person rides the motorcycle?
A car drives north at 48 for 10 and then turns east and goes 5 at 62 . Finally, it goes southwest at 24 for 6. Determine the cars displacement.
The speed of a sound in a container of hydrogen is 201K is 1220m/s. what would be the speed of sound if the temperature were raised to 405K? suppose that hydrogen behaves like an ideal gas.
Using Einsteins formula
Does the pivot point (i.e., the triangle in the diagram upon which the ruler balances) exert a force on the ruler? Does it exert a nonzero torque about the pivot.
A 38.8-cm diameter disk rotates with a constant angular acceleration of 2.60 rad/s2. It starts from rest at t = 0, and the line drawn from the center of the disk to the point P on the rim of the disk makes an angle of 57.3° with the positive x-axis a..
You are asked to design a parallel-plate capacitor having a capacitance of 1 F and a plate separation of 1.00 mm. compute the required surface area of each plate. Is this a realistic size for a capacitor.
The movement of the water because of the tides will give kinetic energy to the turbine blades, causing them to spin. In the calculations that follow ignore any frictional drag because of the seawater.
A glass window pane is exactly 20 cm by 36 cm at 10oC. By how much has its area increased as it temperature is 33oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co.
A person carries a long pole of mass 10kg and length 3.40 m at the angle of 60 degrees. Find the magnitude of the torque on the pole by reason of gravity.
If a disco disk is rotating with a person on it on the outer side, then if he moves inside (towards the center), the angular velocity will change-How will the energy be conserved.
What is the focal length of this mirror. If the object is 25 cm in front of the mirror, what is the image distance.
An airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 7.00 104 Pa. The inside of the box is completely displaced. What is the magnitude of the force es..
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