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A thin, uniform rod is hinged at its midpoint. To begin with, one-half of the rod is bent upward and is perpendicular to the other half. This bent object is rotating at an angular velocity of 5.2 rad/s about an axis that is perpendicular to the left end of the rod and parallel to the rod's upward half (see the drawing). Without the aid of external torques, the rod suddenly assumes its straight shape. What is the angular velocity of the straight rod?
A skateboarder, starting from rest, rolls down a 12.5 m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. Determine the magnitude of her acceleration
Dan is gliding on his skateboard at 4.00 m/s. He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
What is tension in each rope
A car travelling at 95 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.87m. What was the average acceleration of driver during the collision? State the answer in terms of "g's," where 1g = 9..
A 0.75 kg ball attached to the end of a horizontal cord, is rotated in a circle of radius 1.9 m on a frictionless horizontal surface, What is the max speed the ball can have
Water having a density of 1000kg/m^3 is flowing with a velocity of 3 m/s through a pipe. Determine the water velocity at the restriction
A ball is kicked with initial velocity of 14.9 m/s in the horizontal direction and 15.7 in the vertical direction. At what speed does the ball hit the ground
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and HF.
A 224-? and a 211-? resistor are connected in series across an unspecified power supply. what is the exact current (in A) through the 211-? resistor
When an electric circuit is being assembled, a common practice is to twist together two wires carrying equal currents in opposite direction
An unstretched spring has a length of 0.30 m. while the spring is stretched to a total length of 0.60 m, it supports traveling waves moving at 4.5 m/s. How fast would waves travel on this spring if it is stretched to 0.90 m.
If the LED emits light from a circle with diameter 10mm and is to couple to the fiber which has a50 micro meter diameter core .assume it radiates with afull cone angle 30 degree.
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