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A sanding disk with rotational inertia 8.7 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnitude 34 N·m about the central axis of the disk. About that axis and with torque applied for 40 ms, what is the magnitude of the (a) angular momentum and (b) angular velocity of the disk?
A water tank has a mass of 3.65 kg when empty and has a mass of 52.5 kg when filled to a certain level. What is the mass of water in the tank?
In a closed but uninsulated container, 500g of water is shaken until it's temperature increases by 3 degrees Celsius. How much heat is transferred to the environment during the process
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. How much work is done by the variable force that stretches the collagen
a lead ball of mass 18.0 kg is dropped from rest from a height of 23.0 m above the ground, Write in vector format the acceleration of the ball
Suppose the monthly demand for a product is given by p = 400e-0.003x, where p is the price in dollars and x is the number of units.
A speed skater moving across frictionless ice at 8.80 hits a 4.20-m-wide patch of rough ice. What is her acceleration on the rough ice
A particular string of length 3.2 m resonates in four loops at a frequency 360 Hz. What is the distance between two adjacent nodes? What is the frequency of the standing wave that will produce 5 loops?
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively, What is the final overall magnification of the microscope
The average counting rate for a radioactive sample is 486cpm. How do you find the probability that in any given 10 sec interval one gets less than 70 counts? Is this the same as the probability of getting less than 70 x6= 420 counts in 60 secs?
Four resistors are connected to a battery with a terminal voltage of 12 V, as shown in the figure below. (Suppose R 1 = 39.0 and R 2 = 73.0.) Discover the current delivered with the battery to this equivalent resistance. Determine the power delivered..
(a) What is the angular speed of the rod just before it strikes the floor? (Hint: Consider using the principle of conservation of mechanical energy.) (b) What is the magnitude of the angular acceleration of the rod just before it strikes the floor?
A stone held just beneath the surface of a swimming pool isreleased and sinks to the bottom at a constant speed of 0.48 m/s.What is the apparent speed of the stone, as viewed from directlyabove by an observer who is in air?
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