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A 100-kg object moves on a level surface with a coefficient of friction of 0.40. If the initial velocity is 15 m/s, how long will it take for it to come to rest?
A car starts from the origin and is driven 1.1 km south and then 3.5 km in a direction 53° north of east. what is the car's final location
a string 60 cm longfastened at each end. when driven by an oscillator at frequency of120 Hz L=.60m. ym=.02m. f=120Hz. wavelength=.30, ind wavelength in air of soundwave produced by vibratingstring
A concrete highway is built of slabs 8.0 m long (20°C). How wide should expansion cracks between the slabs be (at 20°C) to prevent buckling if the range of temperature is -35°C to +45°C.
In the macroscopic world, you know that you can hear but cannot see around corners. Explain why sound diffracts easily around a classroom door
q1. a football player runs directly down the field for 16 m before turning to the right at an angle of 33 from his
what is the ball's speed immediately after the collision?
Find the focal length of a concave mirror if an object 12cm from the mirror has a virtual image 2.1 times the object's actual size
What is the minimum speed need to drive through a banked turn such a car won't slip down the road
How many electrons would need to be transferred in order to balance these two forces?
The rate of flow of water through a horizontal pipe is 1.98 m3/min. Determine the speed of flow in m/s at a point
A transformer is to be used to provide power for a computer disk drive that needs 6.4 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
Two skydivers are holding on to each other while falling straight down at a common terminal speed of 51.1 m/s. What is the change in kinetic energy of the system
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