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To prevent damage to floors (and to increase friction), a crutch will often have a rubber tip attached to its end. If the end ofthe crutch is a circle of radius 1.4 cm without the tip, and the tip is a circle of radius 2.4 cm , by what factor does the tip reduce the pressure exerted by the crutch?
The label on a 12.0-V truck battery states that it is rated at 181.0 A·h (ampere-hours). Treat the battery as ideal. How much electric energy can the battery supply
Estimate the minimum accelerating voltage required for an X-ray tube with a Fe26 anode to produce a Ka line
A solenoid is 1.6 m long and has 530 turns per meter. what is the cross sectional area of this solenoid if it stores .31 J of energy when it carries I=14A
An airplane with a speed of 87.7 m/s is climbing upward at an angle of 35.1 ° with respect to the horizontal. determine the angle of the velocity vector of the package
A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 7.13 103 W. How much energy does it deliver into a home during 24 h of continuous operation? How much energy does it extract from the outside air?
It is desired to slip an aluminum ring over a steel bar. At 10 the inside diameter of the ring is 4.550 and the diameter of the rod is 4.580. Find the temperature at which the ring can be removed
a speedy tortoise can run with a velocity of 10 cm/s and a hare can run 20 times as fast. in a race they both start at the same time but the hare stops to rest for 2 min, what was the length of the race
a soccer ball is kicked with an initial horizontal speed of 5 m/s and an initial vertical speed of 3m/s. find the ball's verical speed at the apex of the flight
Find the use of an NPN common emitter transistor, advantage of direct - coupled amplifier and bandwidth of an amplifier.
Draw a free body diagram for the block, carefully labeling all forces acting on the block. What is the mass density of the liquid? What will each scale read if block A is pulled up our of the liquid.
Write down an expression for the mass of the nucleus
a monkey pulls a box of bananas with mass 6.2 kg on a surface with a constant speed of 0.50 m/s. how much is the normal force on the box
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