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Question1
Two dogs pull horizontally on ropes attached to a post; angle problem 1 between the ropes is 60.0 degrees. If dog A exerts a force of 270N and dog B exerts a force of 300N discover the magnitude of the resultant force and the angle it makes with dog A's rope.
Question2
An industrial water shutoff valve is designed to operate with 30lb of the effort force. The valve will encounter 200lb of the resistance force applied to a 1.5 inch diameter axle. What is an actual mechanical advantage of the system?
How many homes could be heated with the waste heat
The specific heat of ethanol is 2.44 J/g·°C. How various kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C.How far last car travel before momentarily coming to rest.
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
Suppose you have a 9.00 V battery, a 2 ?F capacitor, and a 7.25 ?F capacitor. Find the charge if the capacitors are connected to the batt
Two tug boats are towing a ship. Each exerts a horizontal force of 5 tons, What net force is exerted on the ship
what time delay Delta t is necessary. A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds.
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. find the time that was recorded on Earth
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
a bus contains a 1740 kg wheel (a disk that has a .56 m radius) and has a total mass of 9600 kg. How high can the bus climb with this stored energy and still have a speed of 3.10 m/s at the top of the hill
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30. At 10.0 after blastoff, the engines suddenly fail, which means that force they produce instantly stops.
After a tornado, a 0.55g straw was found embedded 2.6cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was the speed of the straw when it hit the tree.
The question needed to answer this one is "An 800. kg race car has a coefficient of static friction of 0.98 with the road. What is the minimum radius of the turn
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