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At a certain time a particle had a speed of 20 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval? _____ m/s^2
An aluminum rod 10.0cm long and a steel rod 80.0cm long are combined to form one rod with a total length of 90.0cm. The initial temperature of both rods is 15 degrees celcius. The expansion coefficient of aluminum is 2.4*10^5 and the expansion coeffi..
An airplane wing is designed so that the speed of the air across the top of the wing is 259 m/s when the speed of the air below the wing is 193 m/s. determine the height of the building
Illustrate what is the safe's coefficient of kinetic friction on the bank floor?
An uncharged 4.70*10^-6 F capacitor and an 8.00 *10^5 Omega resistor are placed in series with a 12.0 V battery. find the Maximum Current through the curcuit after the switch is closed
It takes a force of 65.5N to compress the spring of a toy popgun 0.200m to "load" a 0.190kg ball. With what speed will the ball leave the gun
A sample of an unknown material appears to weigh 255 N in air and 195 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material
three charges each of magnitude 9 nc are at separate corners of a square of edge length 4 cm. the two charges at
An 60 kg skier is sliding down a ski slope at a constant velocity. The slope makes an angle of 5 degrees above the horizontal direction. What is the coefficient of kinetic friction between the skis and the snow
The angular momentum of a flywheel having a rotational inertia of 0.250 kg·m2 about its central axis decreases from 2.80 to 1.800 kg·m2/s in 1.00 s. What is the average power of the flywheel
A 40.0-kg shell is fired from a gun with a muzzle velocity 85.0 m/s at 29.0o above the horizontal. What is the horizontal speed of the other fragment
assuming the average person has a mass of 68kg? Do not avoid the weight of the logs. Assume the specific gravity of wood is 0.6.
A 300g ball swings in a vertical circle at the end of a 1.3-m-long string. When the ball is at the bottom of the circle, the tension in the string is 12N
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