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An airplane propeller is 2.14 meter in length (from tip to tip) with mass 107 kilogram and is rotating at 2900rpm about an axis through its center. You can model the propeller as a slender rod. Obtain what is the kinetic rotational energy? Assume that, due to weight constraints, you had to reduce the propeller's mass to 75.0 percent of its original mass, but you still needed to keep the same size and kinetic energy. Determine what would its angular speed have to be?
in rpm
q1. laser light at 635nm falls on a double-slit apparatus with slit separation 6.910-6m. find out the separation
A snowboarder of mass 73 kg slides down the trail shown in the figure below. The first part of the trail is a ramp that makes an angle of 29° with the horizontal, Find the work done by gravity on the snowboarder
A railroad hopper car has a mass of 50000 kg when empty and contains 50000 kg of coal. How fast does the car travel after all the coal is dumped
A radioactive isotope has an activity of 9.32×104 Bq initially. After 3.55 hours the activity is 6.71×104 Bq. What is the half-life of the isotope?
The hot reservoir for a Carnot engine has a temperature of 943 K, while the cold reservoir has a temperature of 495 K. The heat input for this engine is 5280 J. The 495-K reservoir also serves as the hot reservoir for a second Carnot engine.
Standard mathematical constants and symbols (e.g. pi), you may only use the symbols shown in the figure and question description - Which of the following plots correctly represents the electric field intensit
An artillery shell is fired with the initial velocity of 300 m/s at 54.7° above the horizontal. To clear an avalanche, it explodes on the mountainside 55.0 s after firing. What is the x and y components of the shell where it explodes, relative to its..
8 equal drops of water are falling through air with a steady velocity of 10 cm/s. then the terminal velocity of the big drop is
An object has a weight of 0.882 Newton. It is suspended from a scale, which reads 0.735 Newton when the piece is submerged in water. Determine the volume and density of the piece of metal
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air, that the patient and platform start from rest, determine the recoil velocity
Two pole-vaulters just clear the bar at the same height. The first lands at a speed of 7.70 m/s, and the second lands at a speed of 7.95 m/s. The first vaulters clears the bar at a speed of 2.00 m/s. Ignore air resistance and friction and decide the ..
Tom the cat is chasing Jerry the mouse across a table surface1.5 m above the floor. What velocity components will he have just before he hits
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