Physics Rotational Mechanics Level: University
Rotational MotionA car accelerates uniformly from rest to a maximum speed of 27 m/sec in a time of 30 seconds. Each wheel has a radius of .36 m and a mass of 20 kg. Calculate the angular momentum of each wheel the angular acceleration of the wheels ( alpha) and the angular velocity (omega).
Physics Work,Power & Energy Level: University
Rotational MotionA 4.0 kg mass is attached to a string that is wound around a pulley of the same mass as shown in the figure. The mass has gained a speed of 3.0m/s after being released from rest and descending a distance h. The pulleys angular velocity is 40.0 rad/s. The string does not slip on the pulley and there is no friction at the axle of the pulley. Calculate the tension and the Radius of the cylinder.
Question Diagram
Physics Properties Of Matter Level: University
Law of FloattionA uniform solid cube with edge length 10 cm has a mass of 700g. Will this cube float or sink in water? If it floats, how much of its volume will be submerged?
Physics Properties Of Matter Level: University
PressureA hospital patient receives an IV injection under gravity flow. If the blood (gauge) pressure in the vein is 20.0mm hg above what height should the IV bad be places in order to assure flow into the vein. Your normal blood ( gauge) pressure is expressed as 120/80 ( in mm Hg). Why is the blood pressure in the problem so low?
Physics Force & Laws Of Motion Level: University
FrictionA car approaches a level circular curve ( radius + 60.0m). If the coefficient of static friction is 0.7, what is the maximum speed at which the car negotiates the curve at constant speed without skidding?
Physics Rotational Mechanics Level: University
Equation of Rotational MotionThe certain amusement park merry-go-round, moving at its constant operational speed, takes 60 s to complete one complete rotation. Two children are riding hourses one at 3.0 m form the center and the second at 6.0 m from the center. Find the angular speed for each child. Find the linear or tangential speed for each child. If it takes two minutes for the rode to reach its constant operational speed What is the angular acceleration?
Physics Properties Of Matter Level: University
PressureThe four tries of an automobile are each inflated to pressure of 29 psi (2.0 x 10^5 pa ). If each trie has a contact area with the ground of 0.02m^2, find the weight of the car.
Physics Properties Of Matter Level: University
FluidHigh cholesterol in the blood can cause fatty deposits called plaques to form on the walls of the blood vessels suppose a plaque buildup reduces the effective radius of an artery by 25 persent. How does this parital blockage affect the speed of blood through the vein?
Physics Properties Of Matter Level: University
Hydraulic liftIn a car lift used by a service station, compressed air exerts a force on a small piston or radius 5 cm. This pressure is transmitted to a second piston of radius 15 cm. What force must the compressed air exert on the small piston to lift a car whose mass is 1200 kg? What compressed air pressure is necessary to produce this force? Is this a reasonable answer? Explain.
Physics Misc Topic Level: University
TimeperiodWhat happens to the period of a simple pendulum if the length is doubled.What happens if the suspended mass is doubled?
Physics Heat & Thermodynamics Level: University
Why must a room air conditioner be set paratilly out of a window? Why can't it just be set in the center of a room and plugged in? Note that we are talking about an air conditioner not a water evaporative cooler ( swamp cooler).
Physics Heat & Thermodynamics Level: University
Carnot EngineWhen an automobile engine overheats and the radiator water begins to boil the car can still be driven some distance before catastrophic engine damage occurs. why? What determines the onset of really disastrous overheating?
Physics Heat & Thermodynamics Level: University
Kinetic Theory of gasWhy dont the sizes of different molecules present in a gas enter into the equation for the gas laws?
Physics Heat & Thermodynamics Level: University
Thermal ExpansionIf your property must be measured with a metal tape in order to determine the amount of your property taxes would you rather have it measured in the summer or the winter? Remember that your property will not significantly expand or contract with change in season.
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Physics Properties Of Matter Level: University
Explain why a wind blowing past the window of a building causes the window to be blown outward rather than inward.
