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In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth.
(a) How much work was done on the object by Arfeuille in this lift, assuming the object was lifted at constant velocity?
(b) What total force was exerted on Arfeuille's teeth during the lift?
An object 6.0mm high is placed 18cm from a convex mirror of radius of curvature 18cm. Determine the image distance using the mirror equation
A lightweight electric car is powered by ten 12-V batteries. At a speed of 70 km/h, the average frictional force is 1050 N. What must be the power of the electric motor if the car is to travel at a speed of 70 km/h
Three stars, each with the mass and radius of our sun, form the equilateral triangle 5.0×109 {rm m} on a side. If all three are simultaneously released from rest, what are their speeds as they crash together in the center.
Two cylindrical bars, each with diameter of 2.30 cm, are welded together end to end. compute the resistance between the ends of the welded bar
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
At what speed do a bicycle and its rider, with a combined mass of 100-kg, have the equal momentum as a 1500 kg car travelling at 5 ;{ rm m}/ {rm s}.
How much time has elapsed between the two measurements.
q1. what is the minimum distance between two point that will permit them to be resolved at 100km using a terrestrial
A 20.0micro F capacitor is charged by a 155.0-V power supply, then disconnected from the power and connected in series with a 0.280-mH inductor, Calculate the oscillation frequency of the circuit
A person walks north for 20 minutes at a speed of 1.2 m/s. She then has lunch, while resting for 10 minutes. What is her average speed in m/s during this hour
Two 500 g spheres with equal positive charges are suspended by 10.0 cm long strings in a uniform electric field E = 2.00 x 106 N/C, If the charged spheres are in equilibrium when their strings make angles of 20.0. with the vertical, determine the c..
Studies of the relationship of the sun to our Galaxy- The Milky Way - Have revealed that the sun is located near the outer edge of the galatic disc, what is the period of the sun's galactic motion
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