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A steel cable with cross-sectional are 3 cm2 has an elastic limit of 2.4x108 Pa. Find the maximum upward acceleration that can be given a 1200kg elevator supported by the cable if the stress is not to exceed one third of the elastic limit. (g = 9.8 m/s2).
a neutron in a reactor makes and elastic head-on collision with a carbon atom at rest. the mass of the carbon atom is
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm, What are the fractions of muscle and fat in the leg
A hot air heating system rated at 84,000 Btu/hr has an efficiency of 65%. The furnace fan can move 225 ft3 of air per minute. If the air enters the furnace at 60.0°F, determine the temperature of the outlet air.
A speedy tortoise can run at 0.01 meters per second and a hare can run 21 times as fast. In a race they both start at the same time; however the hare stops to rest for 1.50 minutes. So the tortoise wins by a shell (20 cm).
Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 4.40 N
A rotating wheel requires 5.00 s to rotate 26.0 revolutions. Its angular velocity at the end of the 5.00-s interval is 99.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel
Some tropical gyrinid beetles (whirligig beetles) are colored byoptical interference that is due to scales whose alignment forms adiffraction grating (which uses scattered instead of transmitted light). If the incident light is perpendicular on th..
The potential dissimilarity between the plates of a capacitor is 280 V. Midway among the plates, a proton and an electron are released. The electron is released from rest. The proton is projected perpendicularly toward the negative plate with an init..
A capacitor consists of two metallic plates of quadratic form with side a. The voltage on the capacitor is V and charge is Q. What is the distance d between the plates of the capacitor
calculate the ratio of the drag force on a passenger jet flying with a speed of 1100 kmh at an altitude of 10 km to the
What is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph and an initial angle of 42.8 o with respect to the horizontal?
Pacemaker Batteries Pacemakers designed for long-term use commonly employ a lithium-iodine battery capable of supplying 0.42A-h of charge. what is the expected lifetime of the device
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